The signature may not have been computed at the time the module reference
is generated (e.g.: in the future while emitting debug info for a clang
module). Using the full module name is safe because each clang module may
only have a single definition.
NFC.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@248037 91177308-0d34-0410-b5e6-96231b3b80d8
clang modules, if -dwarf-ext-refs (DebugTypesExtRefs) is specified.
This reimplements r247369 in about a third of the amount of code.
Thanks to David Blaikie pointing this out in post-commit review!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@247432 91177308-0d34-0410-b5e6-96231b3b80d8
The type of a member pointer is incomplete if it has no inheritance
model. This lets us reuse more general logic already embedded in clang.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@247346 91177308-0d34-0410-b5e6-96231b3b80d8
When -fmodule-format is set to "obj", emit debug info for all types
declared in a module or referenced by a declaration into the module's
object file container.
This patch adds support for Objective-C types and methods.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@247068 91177308-0d34-0410-b5e6-96231b3b80d8
Usually debug info is created on the fly while during codegen.
With this API it becomes possible to create standalone debug info
for types that are not referenced by any code, such as emitting debug info
for a clang module or for implementing something like -gfull.
Because on-the-fly debug info generation may still insert retained types
on top of them, all RetainedTypes are uniqued in CGDebugInfo::finalize().
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@246210 91177308-0d34-0410-b5e6-96231b3b80d8
to enable the use of external type references in the debug info
(a.k.a. module debugging).
The driver expands -gmodules to "-g -fmodule-format=obj -dwarf-ext-refs"
and passes that to cc1. All this does at the moment is set a flag
codegenopts.
http://reviews.llvm.org/D11958
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@246192 91177308-0d34-0410-b5e6-96231b3b80d8
I stared at `false /*declaration*/` for quite some time before giving up
and checking the actual function to see what it meant. Replacing with
`/* isDefinition = */ false` to save myself effort later.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@246095 91177308-0d34-0410-b5e6-96231b3b80d8
After r244870 flush() will only compare two null pointers and return,
doing nothing but wasting run time. The call is not required any more
as the stream and its SmallString are always in sync.
Thanks to David Blaikie for reviewing.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@244928 91177308-0d34-0410-b5e6-96231b3b80d8
Adjust to LLVM DIBuilder API changes in r243764, using
`createAutoVariable()` and `createParameterVariable()` in place of
`createLocalVariable()`. No real functionality change here.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@243765 91177308-0d34-0410-b5e6-96231b3b80d8
Change `getOrCreateLimitedType()` to return a `DICompositeType` and
remove the casts from its callers. Inside, I've strengthened a `cast`
from `DICompositeTypeBase`, but the casts in the callers already prove
that this is safe. There should be no functionality change here.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@243155 91177308-0d34-0410-b5e6-96231b3b80d8
Change `StaticDataMemberCache` to store references to `DIDerivedType`
directly, and remove now-unnecessary casts from the accessors.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@243129 91177308-0d34-0410-b5e6-96231b3b80d8
standards. Remove several hilariously out-of-date and redundant comments
and move the non-redundant ones into the header file.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241733 91177308-0d34-0410-b5e6-96231b3b80d8
different function signatures. (Previously clang would emit all block
pointer types with the type of the first block pointer in the compile
unit.)
rdar://problem/21602473
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241534 91177308-0d34-0410-b5e6-96231b3b80d8
(__block_literal_generic).
The arbitrary nature of the location confuses lldb and prevents type
uniquing.
rdar://problem/21602473
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241511 91177308-0d34-0410-b5e6-96231b3b80d8
Function static variables, typedefs and records (class, struct or union) declared inside
a lexical scope were associated with the function as their parent scope, rather than the
lexical scope they are defined or declared in.
This fixes PR19238
Patch by: amjad.aboud@intel.com
Differential Revision: http://reviews.llvm.org/D9760
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241154 91177308-0d34-0410-b5e6-96231b3b80d8
This allows a module-aware debugger such as LLDB to import the currently
visible modules before dropping into the expression evaluator.
rdar://problem/20965932
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241084 91177308-0d34-0410-b5e6-96231b3b80d8
The representation of a pointer-to-member in the MS ABI is governed by
the layout of the relevant class or if a model has been explicitly
specified. If no model is specified, then an appropriate
"worst-case-scenario" model is implicitly chosen if, and only, if the
pointer-to-member type's representation was needed.
Debug info cannot force a pointer-to-member type to have a
representation so do not try to query the size of such a type unless we
know it is safe to do so.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@238259 91177308-0d34-0410-b5e6-96231b3b80d8
and as artificial local variables in the debug info.
This is a follow-up to r236059. We can't get rid of the local variables
entirely because the gdb buildbot depends on them, but we can mark them
as artificial while still emitting the correct debug info. As I learned
from review comments other compilers also follow this model.
A paired commit in LLVM temporarily relaxes the debug info verifier to
not check the integrity of DW_OP_bit_pieces of artificial variables.
rdar://problem/20730771
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236125 91177308-0d34-0410-b5e6-96231b3b80d8
LLVM r236120 renamed debug info IR constructs to use a `DI` prefix, now
that the `DIDescriptor` hierarchy has been gone for about a week. This
commit was generated using the rename-md-di-nodes.sh upgrade script
attached to PR23080, followed by running clang-format-diff.py on the
`lib/` portion of the patch.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236121 91177308-0d34-0410-b5e6-96231b3b80d8
in the debug info. This patch deletes a hack that emits the members
of local anonymous unions as local variables.
Besides being morally wrong, the existing representation using local
variables breaks internal assumptions about the local variables' storage
size.
Compiling
```
void fn1() {
union {
int i;
char c;
};
i = c;
}
```
with -g -O3 -verify will cause the verifier to fail after SROA splits
the 32-bit storage for the "local variable" c into two pieces because the
second piece is clearly outside the 8-bit range that is expected for a
variable of type char. Given the choice I'd rather fix the debug
representation than weaken the verifier.
Debuggers generally already know how to deal with anonymous unions when
they are members of C++ record types, but they may have problems finding
the local anonymous struct members in the expression evaluator.
rdar://problem/20730771
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236059 91177308-0d34-0410-b5e6-96231b3b80d8
An upcoming LLVM commit will remove the `DIArray` and `DITypeArray`
typedefs that shadow `DebugNodeArray` and `MDTypeRefArray`,
respectively. Use those types directly.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235412 91177308-0d34-0410-b5e6-96231b3b80d8
An upcoming LLVM commit will delete all the remaining subclasses of (the
already deleted) `DIDescriptor`. Stop using them.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235403 91177308-0d34-0410-b5e6-96231b3b80d8
Prepare for the deletion in LLVM of the subclasses of (the already
deleted) `DIScope` by using the raw pointers they were wrapping
directly.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235355 91177308-0d34-0410-b5e6-96231b3b80d8
Subclasses of (the already deleted) `DIType` will be deleted by an
upcoming LLVM commit. Remove references.
While `DICompositeType` wraps `MDCompositeTypeBase` and `DIDerivedType`
wraps `MDDerivedTypeBase`, most uses of each really meant the more
specific `MDCompositeType` and `MDDerivedType`. I updated accordingly.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235350 91177308-0d34-0410-b5e6-96231b3b80d8
LLVM r235111 changed the `DIBuilder` API to stop using `DIDescriptor`
and its subclasses. Rolled into this was some tightening up of types:
- Scopes: `DIDescriptor` => `MDScope*`.
- Generic debug nodes: `DIDescriptor` => `DebugNode*`.
- Subroutine types: `DICompositeType` => `MDSubroutineType*`.
- Composite types: `DICompositeType` => `MDCompositeType*`.
Note that `DIDescriptor` wraps `MDNode`, and `DICompositeType` wraps
`MDCompositeTypeBase`.
It's this new type strictness that requires changes here.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235112 91177308-0d34-0410-b5e6-96231b3b80d8
`DIType` and its subclasses are about to be gutted in LLVM. Prepare for
that by treating these like the raw pointers they wrap.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235063 91177308-0d34-0410-b5e6-96231b3b80d8
An upcoming LLVM commit will gut `DICompileUnit` and `DIFile`, so start
treating them more like pointers.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235054 91177308-0d34-0410-b5e6-96231b3b80d8
Update for LLVM API change r235041 that makes `DIBuilder` require a
`DebugLoc` to create a debug info intrinsic.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@235042 91177308-0d34-0410-b5e6-96231b3b80d8
An upcoming LLVM commit will remove this API, so stop using it. Just
access the raw pointers using `operator->()`.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@234848 91177308-0d34-0410-b5e6-96231b3b80d8
Stop using `DIDescriptor`'s wrapper around
`MDNode::replaceAllUsesWith()` (which is going away). The new home for
this logic is `DIBuilder::replaceTemporary()`, added in LLVM r234695.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@234696 91177308-0d34-0410-b5e6-96231b3b80d8
Update a few calls to `DIBuilder` now that `MDTuple` array-wrappers
don't have implicit conversions to `MDTuple*`. I may circle back and
update `DIBuilder` to take arrays here, to make it easier for the
callers.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@234327 91177308-0d34-0410-b5e6-96231b3b80d8
Error message was:
CGDebugInfo.cpp(1047) : error C2666: 'llvm::MDTypeRefArray::operator []' : 2 overloads have similar conversions
DebugInfoMetadata.h(106): could be 'llvm::MDTypeRef llvm::MDTypeRefArray::operator [](unsigned int) const'
while trying to match the argument list '(llvm::DITypeArray, int)'
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@234308 91177308-0d34-0410-b5e6-96231b3b80d8
The clang edition of r234255: use built-in `isa<>`, `dyn_cast<>`, etc.,
and only build `DIDescriptor`s from pointers that are correctly typed.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@234256 91177308-0d34-0410-b5e6-96231b3b80d8
`getScope()` passes the scope back through a `DILexicalBlock` even
though the underlying pointer may be an incompatible `MDSubprogram`.
Just use `getContext()` directly.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@234245 91177308-0d34-0410-b5e6-96231b3b80d8
An upcoming LLVM commit will make calling
`DIBuilder::retainType(nullptr)` illegal (actually, it already was, but
it wasn't verified). Check for null before calling.
This triggered in test/CodeGenObjC/debug-info-block-helper.m.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@233443 91177308-0d34-0410-b5e6-96231b3b80d8
A WIP patch to turn on stricter `DIDescriptor` accessor checks fires
here; it's obvious from the code that `T` can be null, so add an
explicit check. Caught by dozens of current testcases.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@232791 91177308-0d34-0410-b5e6-96231b3b80d8
When generating debug info for a static inline member which is initialized for
the DLLExport storage class, hoist the definition into a non-composite type
context. Otherwise, we would trigger an assertion when generating the DIE for
the associated global value as the debug context has a type association. This
addresses PR22669.
Thanks to David Blakie for help in coming up with a solution to this!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@230816 91177308-0d34-0410-b5e6-96231b3b80d8
Use the newly minted `DIImportedEntity` default constructor (r230609)
rather than explicitly specifying `nullptr`. The latter will become
ambiguous when the new debug info hierarchy is committed, since we'll
have both of the following:
explicit DIImportedEntity(const MDNode *);
DIImportedEntity(const MDImportedEntity *);
(Currently we just have the former.)
A default constructor is just as clear.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@230610 91177308-0d34-0410-b5e6-96231b3b80d8
a non-uniqueable temporary node that is only turned into a permanent
unique or distinct node after it is finished.
Otherwise an intermediate node may get accidentally uniqued with another
node as illustrated by the testcase.
Paired commit with LLVM.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@228855 91177308-0d34-0410-b5e6-96231b3b80d8
It's slightly cheaper than copying it, if the DebugLoc points to replaceable
metadata every copy is recorded in a DenseMap, moving reduces the peak size of
that map.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@228492 91177308-0d34-0410-b5e6-96231b3b80d8
Now if you break on a dtor and go 'up' in your debugger (or you get an
asan failure in a dtor) during an exception unwind, you'll have more
context. Instead of all dtors appearing to be called from the '}' of the
function, they'll be attributed to the end of the scope of the variable,
the same as the non-exceptional dtor call.
This doesn't /quite/ remove all uses of CurEHLocation (which might be
nice to remove, for a few reasons) - it's still used to choose the
location for some other work in the landing pad. It'd be nice to
attribute that code to the same location as the exception calls within
the block and to remove CurEHLocation.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@228181 91177308-0d34-0410-b5e6-96231b3b80d8
distinction between the different use-cases. With the previous default
behavior we would occasionally emit empty debug locations in situations
where they actually were strictly required (= on invoke insns).
We now have a choice between defaulting to an empty location or an
artificial location.
Specifically, this fixes a bug caused by a missing debug location when
emitting C++ EH cleanup blocks from within an artificial function, such as
an ObjC destroy helper function.
rdar://problem/19670595
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@228003 91177308-0d34-0410-b5e6-96231b3b80d8
This causes things like assignment to refer to the '=' rather than the
LHS when attributing the store instruction, for example.
There were essentially 3 options for this:
* The beginning of an expression (this was the behavior prior to this
commit). This meant that stepping through subexpressions would bounce
around from subexpressions back to the start of the outer expression,
etc. (eg: x + y + z would go x, y, x, z, x (the repeated 'x's would be
where the actual addition occurred)).
* The end of an expression. This seems to be what GCC does /mostly/, and
certainly this for function calls. This has the advantage that
progress is always 'forwards' (never jumping backwards - except for
independent subexpressions if they're evaluated in interesting orders,
etc). "x + y + z" would go "x y z" with the additions occurring at y
and z after the respective loads.
The problem with this is that the user would still have to think
fairly hard about precedence to realize which subexpression is being
evaluated or which operator overload is being called in, say, an asan
backtrace.
* The preferred location or 'exprloc'. In this case you get sort of what
you'd expect, though it's a bit confusing in its own way due to going
'backwards'. In this case the locations would be: "x y + z +" in
lovely postfix arithmetic order. But this does mean that if the op+
were an operator overload, say, and in a backtrace, the backtrace will
point to the exact '+' that's being called, not to the end of one of
its operands.
(actually the operator overload case doesn't work yet for other reasons,
but that's being fixed - but this at least gets scalar/complex
assignments and other plain operators right)
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@227027 91177308-0d34-0410-b5e6-96231b3b80d8
This workaround was to provide unique call sites to ensure LLVM's inline
debug info handling would properly unique two calls to the same function
on the same line. Instead, this has now been fixed in LLVM (r226736) and
the workaround here can be removed.
Originally committed in r176895, but this isn't a straight revert due to
all the changes since then. I just searched for anything ForcedColumn*
related and removed them.
We could test this - but it didn't strike me as terribly valuable once
we're no longer adding this workaround everything just works as expected
& it's no longer a special case to test for.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@226738 91177308-0d34-0410-b5e6-96231b3b80d8
Several pieces of code were relying on implicit debug location setting
which usually lead to incorrect line information anyway. So I've fixed
those (in r225955 and r225845) separately which should pave the way for
this commit to be cleanly reapplied.
The reason these implicit dependencies resulted in crashes with this
patch is that the debug location would no longer implicitly leak from
one place to another, but be set back to invalid. Once a call with
no/invalid location was emitted, if that call was ever inlined it could
produce invalid debugloc chains and assert during LLVM's codegen.
There may be further cases of such bugs in this patch - they're hard to
flush out with regression testing, so I'll keep an eye out for reports
and investigate/fix them ASAP if they come up.
Original commit message:
Reapply "DebugInfo: Generalize debug info location handling"
Originally committed in r224385 and reverted in r224441 due to concerns
this change might've introduced a crash. Turns out this change fixes the
crash introduced by one of my earlier more specific location handling
changes (those specific fixes are reverted by this patch, in favor of
the more general solution).
Recommitted in r224941 and reverted in r224970 after it caused a crash
when building compiler-rt. Looks to be due to this change zeroing out
the debug location when emitting default arguments (which were meant to
inherit their outer expression's location) thus creating call
instructions without locations - these create problems for inlining and
must not be created. That is fixed and tested in this version of the
change.
Original commit message:
This is a more scalable (fixed in mostly one place, rather than many
places that will need constant improvement/maintenance) solution to
several commits I've made recently to increase source fidelity for
subexpressions.
This resetting had to be done at the DebugLoc level (not the
SourceLocation level) to preserve scoping information (if the resetting
was done with CGDebugInfo::EmitLocation, it would've caused the tail end
of an expression's codegen to end up in a potentially different scope
than the start, even though it was at the same source location). The
drawback to this is that it might leave CGDebugInfo out of sync. Ideally
CGDebugInfo shouldn't have a duplicate sense of the current
SourceLocation, but for now it seems it does... - I don't think I'm
going to tackle removing that just now.
I expect this'll probably cause some more buildbot fallout & I'll
investigate that as it comes up.
Also these sort of improvements might be starting to show a weakness/bug
in LLVM's line table handling: we don't correctly emit is_stmt for
statements, we just put it on every line table entry. This means one
statement split over multiple lines appears as multiple 'statements' and
two statements on one line (without column info) are treated as one
statement.
I don't think we have any IR representation of statements that would
help us distinguish these cases and identify the beginning of each
statement - so that might be something we need to add (possibly to the
lexical scope chain - a scope for each statement). This does cause some
problems for GDB and possibly other DWARF consumers.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@225956 91177308-0d34-0410-b5e6-96231b3b80d8
This reverts commit r225000, r225021, r225083, r225086, r225090.
The root change (r225000) still has several issues where it's caused
calls to be emitted without debug locations. This causes assertion
failures if/when those calls are inlined.
I'll work up some test cases and fixes before recommitting this.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@225555 91177308-0d34-0410-b5e6-96231b3b80d8
The optimization (that appears to have been here since the earliest
implementation (r50848) & has become more complicated over the years) to
avoid recreating the debugloc if it would be the same was out of date
because ApplyDebugLocation was not re-updating the CurLoc/PrevLoc. This
optimization doesn't look terribly beneficial/necessary, so I'm removing
it - if it turns up in benchmarks, I'm happy to reconsider/reimplement
this with justification, but for now it just seems to add
complexity/problems.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@225083 91177308-0d34-0410-b5e6-96231b3b80d8
Originally committed in r224385 and reverted in r224441 due to concerns
this change might've introduced a crash. Turns out this change fixes the
crash introduced by one of my earlier more specific location handling
changes (those specific fixes are reverted by this patch, in favor of
the more general solution).
Recommitted in r224941 and reverted in r224970 after it caused a crash
when building compiler-rt. Looks to be due to this change zeroing out
the debug location when emitting default arguments (which were meant to
inherit their outer expression's location) thus creating call
instructions without locations - these create problems for inlining and
must not be created. That is fixed and tested in this version of the
change.
Original commit message:
This is a more scalable (fixed in mostly one place, rather than many
places that will need constant improvement/maintenance) solution to
several commits I've made recently to increase source fidelity for
subexpressions.
This resetting had to be done at the DebugLoc level (not the
SourceLocation level) to preserve scoping information (if the resetting
was done with CGDebugInfo::EmitLocation, it would've caused the tail end
of an expression's codegen to end up in a potentially different scope
than the start, even though it was at the same source location). The
drawback to this is that it might leave CGDebugInfo out of sync. Ideally
CGDebugInfo shouldn't have a duplicate sense of the current
SourceLocation, but for now it seems it does... - I don't think I'm
going to tackle removing that just now.
I expect this'll probably cause some more buildbot fallout & I'll
investigate that as it comes up.
Also these sort of improvements might be starting to show a weakness/bug
in LLVM's line table handling: we don't correctly emit is_stmt for
statements, we just put it on every line table entry. This means one
statement split over multiple lines appears as multiple 'statements' and
two statements on one line (without column info) are treated as one
statement.
I don't think we have any IR representation of statements that would
help us distinguish these cases and identify the beginning of each
statement - so that might be something we need to add (possibly to the
lexical scope chain - a scope for each statement). This does cause some
problems for GDB and possibly other DWARF consumers.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@225000 91177308-0d34-0410-b5e6-96231b3b80d8
Asserting when building compiler-rt when using a GCC host compiler.
Reverting while I investigate.
This reverts commit r224941.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224970 91177308-0d34-0410-b5e6-96231b3b80d8
Originally committed in r224385 and reverted in r224441 due to concerns
this change might've introduced a crash. Turns out this change fixes the
crash introduced by one of my earlier more specific location handling
changes (those specific fixes are reverted by this patch, in favor of
the more general solution).
Original commit message:
This is a more scalable (fixed in mostly one place, rather than many
places that will need constant improvement/maintenance) solution to
several commits I've made recently to increase source fidelity for
subexpressions.
This resetting had to be done at the DebugLoc level (not the
SourceLocation level) to preserve scoping information (if the resetting
was done with CGDebugInfo::EmitLocation, it would've caused the tail end
of an expression's codegen to end up in a potentially different scope
than the start, even though it was at the same source location). The
drawback to this is that it might leave CGDebugInfo out of sync. Ideally
CGDebugInfo shouldn't have a duplicate sense of the current
SourceLocation, but for now it seems it does... - I don't think I'm
going to tackle removing that just now.
I expect this'll probably cause some more buildbot fallout & I'll
investigate that as it comes up.
Also these sort of improvements might be starting to show a weakness/bug
in LLVM's line table handling: we don't correctly emit is_stmt for
statements, we just put it on every line table entry. This means one
statement split over multiple lines appears as multiple 'statements' and
two statements on one line (without column info) are treated as one
statement.
I don't think we have any IR representation of statements that would
help us distinguish these cases and identify the beginning of each
statement - so that might be something we need to add (possibly to the
lexical scope chain - a scope for each statement). This does cause some
problems for GDB and possibly other DWARF consumers.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224941 91177308-0d34-0410-b5e6-96231b3b80d8
Use new `DIBuilder` API from LLVM r224482 to mutate `DICompositeType`s,
rather than changing them directly. This allows `DIBuilder` to track
otherwise orphaned cycles when `CollectContainingType()` creates a
self-reference.
Fixes PR21941.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224483 91177308-0d34-0410-b5e6-96231b3b80d8
Fails an ASan bootstrap - I'll try to reproduce locally & sort that out
before recommitting.
This reverts commit r224385.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224441 91177308-0d34-0410-b5e6-96231b3b80d8
This is a more scalable (fixed in mostly one place, rather than many
places that will need constant improvement/maintenance) solution to
several commits I've made recently to increase source fidelity for
subexpressions.
This resetting had to be done at the DebugLoc level (not the
SourceLocation level) to preserve scoping information (if the resetting
was done with CGDebugInfo::EmitLocation, it would've caused the tail end
of an expression's codegen to end up in a potentially different scope
than the start, even though it was at the same source location). The
drawback to this is that it might leave CGDebugInfo out of sync. Ideally
CGDebugInfo shouldn't have a duplicate sense of the current
SourceLocation, but for now it seems it does... - I don't think I'm
going to tackle removing that just now.
I expect this'll probably cause some more buildbot fallout & I'll
investigate that as it comes up.
Also these sort of improvements might be starting to show a weakness/bug
in LLVM's line table handling: we don't correctly emit is_stmt for
statements, we just put it on every line table entry. This means one
statement split over multiple lines appears as multiple 'statements' and
two statements on one line (without column info) are treated as one
statement.
I don't think we have any IR representation of statements that would
help us distinguish these cases and identify the beginning of each
statement - so that might be something we need to add (possibly to the
lexical scope chain - a scope for each statement). This does cause some
problems for GDB and possibly other DWARF consumers.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224385 91177308-0d34-0410-b5e6-96231b3b80d8
When emitting nested block definitions, the insert-at-point variant of
DIBuilder::insertDeclare() could be called with the insertion point set
to the end-of-BasicBlock sentinel, causing the parent pointer of the
CallInst to be set to the intentionally bogus value of the sentinel.
Fixed by conditionally invoking the correct version of insertDeclare().
rdar://problem/19034882
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222487 91177308-0d34-0410-b5e6-96231b3b80d8
After LLVM r222434, the Variables field of DISubprograms for forward
declarations will always be null. No need to keep code around to
delete them.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222437 91177308-0d34-0410-b5e6-96231b3b80d8
This is a followup to r222373. A better solution to the problem solved
there is to not create the leaked nodes at all (we know that they will
never be used for forward declared functions anyway). To avoid bot
breakage in the interval between the cfe and llvm commits, add a check
that the nMDNode is not null before deleting it. This code can completely
go away after the LLVM part is in.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222433 91177308-0d34-0410-b5e6-96231b3b80d8
Addresses PR21511 by emitting appropriate metadata rather than
faux-global definitions for a variable that doesn't have a definition.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222377 91177308-0d34-0410-b5e6-96231b3b80d8
While emitting debug information for function forward decalrations, we
create DISubprogram objects that aran't stored in the AllSubprograms
list, and thus won't get finalized by the DIBuilder. During the DIBuilder
finalize(), the temporary MDNode allocated for the DISubprogram
Variables field gets RAUWd with a non temporary DIArray. For the forward
declarations, simply delete that temporary node before we delete the
parent node, so that it doesn't leak.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222373 91177308-0d34-0410-b5e6-96231b3b80d8
Currently this function would return nothing for functions or globals that
haven't seen a definition yet. Make it return a forward declaration that will
get RAUWed with the definition if one is seen at a later point. The strategy
used to implement this is similar to what's done for types: the forward
declarations are stored in a vector and post processed upon finilization to
perform the required RAUWs.
For now the only user of getDeclarationOrDefinition() is EmitUsingDecl(), thus
this patch allows to emit correct imported declarations even in the absence of
an actual definition of the imported entity.
(Another user will be the debug info generation for argument default values
that I need to resurect).
Differential Revision: http://reviews.llvm.org/D6173
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222220 91177308-0d34-0410-b5e6-96231b3b80d8
So DWARF5 specs out auto deduced return types as DW_TAG_unspecified_type
with DW_AT_name "auto", and GCC implements this somewhat, but it
presents a few problems to do this with Clang.
GCC's implementation only applies to member functions where the auto
return type isn't deduced immediately (ie: member functions of templates
or member functions defined out of line). In the common case of an
inline deduced return type function, GCC emits the DW_AT_type as the
deduced return type.
Currently GDB doesn't seem to behave too well with this debug info - it
treats the return type as 'void', even though the definition of the
function has the correctly deduced return type (I guess it sees the
return type the declaration has, doesn't understand it, and assumes
void). This means the function's ABI might be broken (non-trivial return
types, etc), etc.
Clang, on the other hand doesn't track this particular case of a
deducable return type that is deduced immediately versus one that is
deduced 'later'. So if we implement the DWARF5 representation, all
deducible return type functions would get adverse GDB behavior
(including deduced return type lambda functions, inline deduced return
type functions, etc).
Also, we can't just do this for auto types that are not deduced -
because Clang marks even the declaration's return type as deduced (&
provides the underlying type) once a definition is seen that allows the
deduction. So we have to ignore even deduced types - but we can't do
that for auto variables (because this representation only applies to
function declarations - variables and function definitions need the real
type so the function can be called, etc) so we'd need to add an extra
flag to the type unwrapping/creation code to indicate when we want to
see through deduced types and when we don't. It's also not as simple as
just checking at the top level when building a function type (for one
thing, we reuse the function type building for building function pointer
types which might also have 'auto' in them - but be the type of a
variable instead) because the auto might be arbitrarily deeply nested
("auto &", "auto (*)()", etc...)
So, with all that said, let's do the simple thing that works in existing
debuggers for now and treat these functions the same way we do function
templates and implicit special members: omit them from the member list,
since they can't be correctly called anyway (without knowing the return
type the ABI isn't know and a function call could put the arguments in
the wrong place) so they're not much use to the user.
At some point in the future, when GDB understands the DWARF5
representation better it might be worth plumbing through the extra type
builder handling to avoid looking through AutoType for some callers,
etc...
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221704 91177308-0d34-0410-b5e6-96231b3b80d8
... instead of a DIScope that might wrap something that's not actually
a DIScope (eg. a DIGlobalVariable);
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221481 91177308-0d34-0410-b5e6-96231b3b80d8
When we are generating the global initializer functions, we call
CGDebugInfo::EmitFunctionStart() with a valid decl which is describing
the initialized global variable. Do not update the DeclCache with this
key as it will overwrite the the cached variable DIGlobalVariable with
the newly created artificial DISubprogram.
One could wonder if we should put artificial subprograms in the DIE tree
at all (there are vaild uses for them carrying line information though).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221385 91177308-0d34-0410-b5e6-96231b3b80d8
This fixes a corner-case where __uuidof as a template argument would
result in us trying to emit a GLValue as an RValue. This would lead to
a crash down the road.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220585 91177308-0d34-0410-b5e6-96231b3b80d8
The previous IR representation used the non-lexical decl context, which
placed the definitions in the same scope as the declarations (ie: within
the class) - this was hidden by the fact that LLVM currently doesn't
respect the context of global variable definitions at all, and always
puts them at the top level (as direct children of the compile_unit).
Having the correct lexical scope improves source fidelity and simplify
backend global variable emission (with changes coming shortly).
Doing something similar for non-member global variables would help
simplify/cleanup things further (see FIXME in the commit) and provide
similar source fidelity benefits to the final debug info.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220488 91177308-0d34-0410-b5e6-96231b3b80d8
I haven't done any actual impact analysis of this change as it's a
strict improvement, but I'd be curious to know how much it helps.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220408 91177308-0d34-0410-b5e6-96231b3b80d8
Plumb through the full QualType of the TemplateArgument::Declaration, as
it's insufficient to only know whether the type is a reference or
pointer (that was necessary for mangling, but insufficient for debug
info). This shouldn't increase the size of TemplateArgument as
TemplateArgument::Integer is still longer by another 32 bits.
Several bits of code were testing that the reference-ness of the
parameters matched, but this seemed to be insufficient (various other
features of the type could've mismatched and wouldn't've been caught)
and unnecessary, at least insofar as removing those tests didn't cause
anything to fail.
(Richard - perchaps you can hypothesize why any of these checks might
need to test reference-ness of the parameters (& explain why
reference-ness is part of the mangling - I would've figured that for the
reference-ness to be different, a prior template argument would have to
be different). I'd be happy to add them in/beef them up and add test
cases if there's a reason for them)
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219900 91177308-0d34-0410-b5e6-96231b3b80d8
When lazily constructing static member variable declarations (when
the vtable optimization fires and the definition of the type is omitted
(or built later, lazily), but the out of line definition of the static
member is provided and must be described in debug info) ensure we use
the canonical declaration when computing the file, line, etc for that
declaration (rather than the definition, which is also a declaration,
but not the canonical one).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219736 91177308-0d34-0410-b5e6-96231b3b80d8
By leaving these members out of the member list, we avoid them being
emitted into type unit definitions - while still allowing the
definition/declaration to be injected into the compile unit as expected.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219101 91177308-0d34-0410-b5e6-96231b3b80d8
By leaving these members out of the member list, we avoid them being
emitted into type unit definitions - while still allowing the
definition/declaration to be injected into the compile unit as expected.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219100 91177308-0d34-0410-b5e6-96231b3b80d8
Most of the debug info emission is powered essentially from function
definitions - if we emit the definition of a function, we emit the types
of its parameters, the members of those types, and so on and so forth.
For types that aren't referenced even indirectly due to this - because
they only appear in temporary expressions, not in any named variable, we
need to explicitly emit/add them as is done here. This is not the only
case of such code, and we might want to consider handling "void
func(void*); ... func(new T());" (currently debug info for T is not
emitted) at some point, though GCC doesn't. There's a much broader
solution to these issues, but it's a lot of work for possibly marginal
gain (but might help us improve the default -fno-standalone-debug
behavior to be even more aggressive in some places). See the original
review thread for more details.
Patch by jyoti allur (jyoti.yalamanchili@gmail.com)!
Differential Revision: http://reviews.llvm.org/D2498
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218390 91177308-0d34-0410-b5e6-96231b3b80d8
Due to the possible presence of return-by-out parameters, using the LLVM
argument number count when numbering debug info arguments can end up
off-by-one. This could produce two arguments with the same number, which
would in turn cause LLVM to emit only one of those arguments (whichever
it found last) or assert (r215157).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215227 91177308-0d34-0410-b5e6-96231b3b80d8
There are no vtable offset offsets in the MS ABI, but vbtable offsets
are analogous. There are no consumers of this information yet, but at
least we don't crash now.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215149 91177308-0d34-0410-b5e6-96231b3b80d8
This reverts commit r215137.
This doesn't work at all, an offset-offset is probably different than an
offset. I'm scared that this passed our normal test suite.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215141 91177308-0d34-0410-b5e6-96231b3b80d8
This fixes an assertion when generating full debug info in the MS ABI
for classes with virtual bases.
Fixes PR20579.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215137 91177308-0d34-0410-b5e6-96231b3b80d8
The MS ABI has a notion of 'required alignment' for fields; this
alignment supercedes pragma pack directives.
MSVC takes into account alignment attributes on typedefs when
determining whether or not a field has a certain required alignment.
Do the same in clang by tracking whether or not we saw such an attribute
when calculating the type's bitwidth and alignment.
This fixes PR20418.
Reviewers: rnk
Differential Revision: http://reviews.llvm.org/D4714
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@214274 91177308-0d34-0410-b5e6-96231b3b80d8
This is the last patch to unique the type array of a subroutine type.
This is the paired commit with llvm r214132.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@214133 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This new debug emission kind supports emitting line location
information in all instructions, but stops code generation
from emitting debug info to the final output.
This mode is useful when the backend wants to track source
locations during code generation, but it does not want to
produce debug info. This is currently used by optimization
remarks (-Rpass, -Rpass-missed and -Rpass-analysis).
When one of the -Rpass flags is used, the front end will enable
location tracking, only if no other debug option is enabled.
To prevent debug information from being generated, a new debug
info kind LocTrackingOnly causes DIBuilder::createCompileUnit() to
not emit the llvm.dbg.cu annotation. This blocks final code generation
from generating debug info in the back end.
Depends on D4234.
Reviewers: echristo, dblaikie
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D4235
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211610 91177308-0d34-0410-b5e6-96231b3b80d8
This looks like the right way for this check to work, but there is
another semi-obvious bug, I would think: why is CurLoc not zero'd out
between functions? The possibility for it to bleed between them seems
problematic. (& indeed I caused tests to fail when I fixed this a
different way, by setting CurLoc to SourceLocation() and the end of
EmitFunctionEnd... )
The changes to debug-info-blocks.m are due to a mismatch between the
source manager's file naming and CGDebugInfo's default handling when no
-main-file-name is specified. This actually reveals somewhat of a bug in
the debug info when using source files from standard in, too. See the
comment in CGDebugInfo::CreateCompileUnit for more details.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208742 91177308-0d34-0410-b5e6-96231b3b80d8
While constructing ObjC Interface types we might create the declaration
of some normal C++ types, thus adding things to the ReplaceMap. Make
sure we process the ReplaceMap after the ObjC interfaces.
In theory we know at this point, since we're at the end of the TU, that
we won't be upgrading any declarations to definitions, so we could just
construct non-temporary nodes, but that would require extra state in
CGDebugInfo to conditionalize the creation of declaration nodes which
seems annoying/more work than is appropriate.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208226 91177308-0d34-0410-b5e6-96231b3b80d8
Reverting r208106 to reapply r208065 with a fix for the regression. The
issue was that the enum tried to be built even if the declaration hadn't
been constructed for debug info - presenting problems for enum templates
and typedefs of enums with names for linkage purposes.
Original commit message:
This regressed a little further 208055 though it was already a little
broken.
While the requiresCompleteType optimization should be implemented here.
Future (possibly near future) work.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208114 91177308-0d34-0410-b5e6-96231b3b80d8
This is breaking the compiler-rt build. Reverting while I
investigate/fix.
This reverts commit r208065.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208106 91177308-0d34-0410-b5e6-96231b3b80d8
This regressed a little further 208055 though it was already a little
broken.
While the requiresCompleteType optimization should be implemented here.
Future (possibly near future) work.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208065 91177308-0d34-0410-b5e6-96231b3b80d8
CGDebugInfo and DIBuilder were lax in their handling of temporary
MDNodes. All temporary nodes need to be deleted, which means they need
to be RAUW'd with a permanent node. This was not happening.
To ensure this, leverage DIBuilder's new ability to create both
permanent and temporary declarations. Ensure all temporary declarations
are RAUW'd, even with itself. (DIDescriptor::RAUW handles the case where
it is replaced with itself and creates a new, duplicate permanent node
to replace itself with)
This means that all temporary declarations must be added to the
ReplacementMap even if they're never upgraded to definitions - so move
the point of insertion into the map to the point of creation of the
declarations.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208055 91177308-0d34-0410-b5e6-96231b3b80d8
This takes a different approach than the
completedType/requiresCompleteType work which relies on AST callbacks to
upgrade the type declaration to a definition. Instead, just defer
constructing the definition to the end of the translation unit.
This works because the definition is never needed by other debug info
(so far as I know), whereas the definition of a struct may be needed by
other debug info before the end of the translation unit (such as
emitting the definition of a member function which must refer to that
member function's declaration).
If we had a callback for whenever an IVar was added to an ObjC interface
we could use that, and remove the need for the ObjCInterfaceCache, which
might be nice. (also would need a callback for when it was more than
just a declaration so we could get properties, etc).
A side benefit is that we also don't need the CompletedTypeCache
anymore. Just rely on the declaration-ness of a type to decide whether
its definition is yet to be emitted.
There's still the PR19562 memory leak, but this should hopefully make
that a bit easier to approach.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208015 91177308-0d34-0410-b5e6-96231b3b80d8
Items were being redundantly added to the replacement map (both when the
declaration was created, and then again when its definition was
constructed) which caused extra handling to be required when walking the
map (as elements may've already been replaced due to prior entries). By
avoiding adding the duplicates, the checks in the replacement handling
can be replaced with assertions.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208000 91177308-0d34-0410-b5e6-96231b3b80d8
parts of Clang. I don't really have any opinion about whether using that
macro is good or bad, but its odd that this is the only one, and Eric
seemed happy with just nuking it for now.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@206806 91177308-0d34-0410-b5e6-96231b3b80d8
specializations collect all arguments and not just the ones from the
class template partial specialization from which this class template
specialization was instantiated. The debug info does not represent the
partial specialization otherwise and so specialized parameters would
go missing.
rdar://problem/16636569.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@206430 91177308-0d34-0410-b5e6-96231b3b80d8
are not associated with any source lines.
Previously, if the Location of a Decl was empty, EmitFunctionStart would
just keep using CurLoc, which would sometimes be correct (e.g., thunks)
but in other cases would just point to a hilariously random location.
This patch fixes this by completely eliminating all uses of CurLoc from
EmitFunctionStart and rather have clients explicitly pass in a
SourceLocation for the function header and the function body.
rdar://problem/14985269
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205999 91177308-0d34-0410-b5e6-96231b3b80d8
sure that a debugger can find them when stepping through code,
for example from the included testcase:
12 int test_it() {
13 c = 1;
14 d = 2;
-> 15 a = 4;
16 return (c == 1);
17 }
18
(lldb) p a
(int) $0 = 2
(lldb) p c
(int) $1 = 2
(lldb) p d
(int) $2 = 2
and a, c, d are all part of the file static anonymous union:
static union {
int c;
int d;
union {
int a;
};
struct {
int b;
};
};
Fixes PR19221.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205952 91177308-0d34-0410-b5e6-96231b3b80d8
We already got the type alias correct (though I've included a test case
here) since Clang represents that like any other typedef - but type
alias templates weren't being handled.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205691 91177308-0d34-0410-b5e6-96231b3b80d8
This was reverted in 205664 and seems to be fixed by 205668... though
that may be more by accident than anything well founded.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205669 91177308-0d34-0410-b5e6-96231b3b80d8
While the folding set would deduplicate the nodes themselves and LLVM
would handle not emitting the same global twice, it still meant creating
a long/redundant list of global variables.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205668 91177308-0d34-0410-b5e6-96231b3b80d8
This reverts commit r205655.
Breaks the compiler-rt build with an assertion failure in LLVM...
reverting while I investigate.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205664 91177308-0d34-0410-b5e6-96231b3b80d8
See the comment for CodeGenFunction::tryEmitAsConstant that describes
how in some contexts (lambdas) we must not emit references to the
variable, but instead use the constant directly - because of this we end
up emitting a constant for the variable, as well as emitting the
variable itself.
Should we just skip putting the variable on the stack at all and omit
the debug info for the constant? It's not clear to me - what if the
address of the local is taken?
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205651 91177308-0d34-0410-b5e6-96231b3b80d8
This was committed 4 years ago in 108916 with insufficient testing to
explain why the "getTypeAsWritten" case was appropriate. Experience says
that it isn't - the presence or absence of an explicit instantiation
declaration was causing this code to generate either i<int> or i<int,
int>.
That didn't seem to be a useful distinction, and omitting the template
arguments was destructive to debuggers being able to associate the two
types across translation units or across compilers (GCC, reasonably,
never omitted the arguments).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205447 91177308-0d34-0410-b5e6-96231b3b80d8
We don't want to encourage the code to emit a lexical block for
a function that needs one in order for the line table to change,
we need to grab the line information from the body of the pattern
that we were instantiated from, this code should do that.
Modify the test case to ensure that we're still looking in the
right place for all of the scopes and also that we haven't
created a lexical block where we didn't need one.
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instead of rolling an inefficient version of the function. This
changes some order of emission of metadata nodes, fix up those
testcases and make them more flexible to some changes.
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location that the next call emitLocation() would default to. Otherwise
setLocation() may wrongly believe that the current source file didn't
change, when in fact it did.
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* detect out of line definitions correctly
* detect member function explicit specializations correctly
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We should only have this optimization fire when the explicit
instantiation definition would cause at least one member function to be
emitted, thus ensuring that even a compiler not performing this
optimization would still emit the full type information elsewhere.
But we should also pessimize output still by always emitting the
definition when the explicit instantiation definition appears so that at
some point in the future we can depend on that information even when no
code had to be emitted in that TU. (this shouldn't happen very often,
since people mostly use explicit spec decl/defs to reduce code size -
but perhaps one day they could use it to explicitly reduce debug info
size too)
This was worth about 2% for Clang and LLVM - so not a huge win, but a
win. It looks really great for simple STL programs (include <string> and
just declare a string - 14k -> 1.4k of .dwo)
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A return type is the declared or deduced part of the function type specified in
the declaration.
A result type is the (potentially adjusted) type of the value of an expression
that calls the function.
Rule of thumb:
* Declarations have return types and parameters.
* Expressions have result types and arguments.
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of the current compilation unit.
As a side effect this enables many more LTO uniquing opportunities.
This reapplies r199757 with a better testcase.
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of the current compilation unit.
As a side effect this enables many more LTO uniquing opportunities.
rdar://problem/15851206
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Fix a perennial source of confusion in the clang type system: Declarations and
function prototypes have parameters to which arguments are supplied, so calling
these 'arguments' was a stretch even in C mode, let alone C++ where default
arguments, templates and overloading make the distinction important to get
right.
Readability win across the board, especially in the casting, ADL and
overloading implementations which make a lot more sense at a glance now.
Will keep an eye on the builders and update dependent projects shortly.
No functional change.
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class and use it pervasively to restore debug locations.
Fixes an interaction between cleanup and EH that caused the location
to not be restored properly after emitting a landing pad.
rdar://problem/15208190
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C and C++ don't emit an extra lexical scope for the compound statement
that is the body of an Objective-C method.
rdar://problem/15010825
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It controls everything that -flimit-debug-info used to, plus the
vtable type optimization. The old -fno-limit-debug-info option is now an
alias to -fstandalone-debug and vice versa.
Standalone is the default on Darwin until dtrace is updated to work with
non-standalone debug info (rdar://problem/15758808).
Note: I kept the LimitedDebugInfo name in CodeGenOptions::DebugInfoKind
because NoStandaloneDebugInfo sounded even more confusing.
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the lexical block formed by the compound statement that is the function
body.
rdar://problem/15010825
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These members will still be lazily added to the relevant DWARF DIEs in
LLVM but when enumerating the members they will not appear. This allows
DWARF type units to be more consistent - the type unit will never
contain these special members (so all instances of the type should have
the same DIEs without some having some special members and others having
others) and the special members will be added to the skeletal
declaration that appears in the relevant compile_unit.
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This patch tries to avoid unrelated changes other than fixing a few
hyphen-related ambiguities in nearby lines.
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Summary:
In general, this type node can be used to represent any type adjustment
that occurs implicitly without losing type sugar. The immediate use of
this is to adjust the calling conventions of member function pointer
types without breaking template instantiation.
Fixes PR17996.
Reviewers: rsmith
Differential Revision: http://llvm-reviews.chandlerc.com/D2332
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GCC ToT doesn't do this & it's worth about 3.2% on Clang's DWO file size
with Clang. Some or all of this may be due to things like r190715 which
could have source fixes/improvements, but it's not clear that's the case
and that doesn't help other source bases.
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By removing the possibility of strange partial definitions with no
members that older GCC's produced for the otherwise unreferenced outer
types of referenced inner types, we can simplify debug info generation
and correct this bug. Newer (4.8.1 and ToT) GCC's don't produce this
quirky debug info, and instead produce the full definition for the outer
type (except in the case where that type is dynamic and its vtable is
not emitted in this TU).
During the creation of the context for a type, we may revisit that type
(due to the need to visit template parameters, among other things) and
used to end up visiting it first there. Then when we would reach the
original code attempting to define that type, we would lose debug info
by overwriting its members.
By avoiding the possibility of latent "defined with no members" types,
we can be sure than whenever we already have a type in a cache (either a
definition or declaration), we can just return that. In the case of a
full definition, our work is done. In the case of a partial definition,
we must already be in the process of completing it. And in the case of a
declaration, the completed/vtable/etc callbacks can handle converting it
to a definition.
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Debug info emission was tripping over an IRGen bug (fixed in r189996)
that was resulting in duplicate emission of static data members of class
templates in namespaces.
We could add more test coverage to debug info for this issue
specifically, but I think the underlying IRGen test is more targeted and
sufficient for the issue.
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This reverts commit r189013.
This is causing a segfault crash in a test case I have. Reverting while
I investigate the issue.
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We use CXX mangler to generate unique identifier for external C++ struct,
union, class and enum. Types with unique identifier are added to retained
types by DIBuilder.
Testing cases are updated to reflect the unique identifier generated for types.
The order of MDNodes is changed because of retained types and testing cases
are updated accordingly.
Testing case debug-info-uuid.cpp now emits error with Itanium mangler, since
uuid is not yet handled in Itanium mangler. And it will check for the error
message.
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We had further discussions on how to retain types, whether to do it in front end
or in DIBuilder. And we agree to do it in DIBuilder so front ends
generating unique identifier do not need to worry about retaining them.
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We use CXX mangler to generate unique identifier for external C++ struct,
union, class and enum. Types with unique identifier are added to RetainedTypes
to make sure they are treated as used even when all uses are replaced with
the identifiers.
A single type can be added to RetainedTypes multiple times. For example, both
createForwardDecl and createLimitedType can add the same type to RetainedTypes.
A set is used to avoid duplication when updating AllRetainTypes in DIBuilder.
Testing cases are updated to reflect the unique identifier generated for types.
The order of MDNodes is changed because of retained types and testing cases
are updated accordingly.
Testing case debug-info-uuid.cpp now emits error with Itanium mangler, since
uuid is not yet handled in Itanium mangler.
We choose to update RetainedTypes in clang, then at finalize(), we update
AllRetainTypes in DIBuilder. The other choice is to update AllRetainTypes
in DIBuilder when creating a DICompositeType with unique identifier. This
option requires using ValueHandle for AllRetainTypes in DIBuilder since
the created DICompositeType can be modified later on by setContainingType etc.
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Both functions will take a Type pointer instead of a Decl pointer. This helps
with follow-up type uniquing patches, which need the Type pointer to call
CXX mangler to generate unique identifiers.
No functionality change.
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In the transition from declaration (with some members) to definition, we
were overwriting the list of members with the empty list when attaching
template parameters.
The fix is in llvm::DICompositeType::addMember (along with asserts that
cause this bug to be covered by existing Clang test cases), including
adding some asserts to catch this sort of issue which found issues fixed
in this commit.
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This reverts commit r189320.
Alexey Samsonov and Dmitry Vyukov presented some arguments for keeping
these around - though it still seems like those tasks could be solved by
a tool just using the symbol table. In a very small number of cases,
thunks may be inlined & debug info might be able to save profilers &
similar tools from misclassifying those cases as part of the caller.
The extra changes here plumb through the VarDecl for various cases to
CodeGenFunction - this provides better fidelity through a few APIs but
generally just causes the CGF::StartFunction to fallback to using the
name of the IR function as the name in the debug info.
The changes to debug-info-global-ctor-dtor.cpp seem like goodness. The
two names that go missing (in favor of only emitting those names as
linkage names) are names that can be demangled - emitting them only as
the linkage name should encourage tools to do just that.
Again, thanks to Dinesh Dwivedi for investigation/work on this issue.
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Summary:
Previously the backend wouldn't get to see the underlying GlobalValue
that corresponds to the template argument because it would be hidden by
a cast at the IR level. Instead strip the pointer casts off of the
value until we see the underlying GlobalValue.
Reviewers: dblaikie, echristo, majnemer
Reviewed By: majnemer
CC: cfe-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D1508
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Summary:
This allows us to handle the general case where a non-type template
argument evaluates to a constant expression which isn't integral or a
declaration.
This fixes PR16939.
Reviewers: dblaikie, rsmith
Reviewed By: dblaikie
CC: cfe-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D1453
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Adrian Prantl