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llvm-project/llvm/lib
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Max Kazantsev 34ae308c73 [SCEV] Use context to strengthen flags of BinOps 
Sometimes SCEV cannot infer nuw/nsw from something as simple as
```
  len in [0, MAX_INT]
...
  iv = phi(0, iv.next)
  guard(iv <s len)
  guard(iv <u len)
  iv.next = iv + 1
```
just because flag strenthening only relies on definition and does not use local facts.
This patch adds support for the simplest case: inference of flags of `add(x, constant)`
if we can contextually prove that `x <= max_int - constant`.

In case if it has negative CT impact, we can add an option to switch it off. I woudln't
expect that though.

Differential Revision: https://reviews.llvm.org/D129643
Reviewed By: apilipenko
 		2022-08-03 14:08:57 +07:00
..
Analysis [SCEV] Use context to strengthen flags of BinOps 2022-08-03 14:08:57 +07:00
AsmParser Remove 'no_sanitize_memtag'. Add 'sanitize_memtag'. 2022-07-13 08:54:41 -07:00
BinaryFormat [AMDGPU] Add the uses_dynamic_stack field to the kernel descriptor and the kernel metadata map 2022-07-18 10:07:13 +05:30
Bitcode [NFC] Switch a few uses of undef to poison as placeholders for unreachable code 2022-07-30 13:55:56 +01:00
Bitstream
…
CodeGen [llvm][NFC] Refactor code to use ProfDataUtils 2022-08-03 00:09:45 +00:00
DWARFLinker [Reland][Debuginfo][llvm-dwarfutil] Add check for unsupported debug sections. 2022-07-28 21:29:16 +03:00
DWP llvm-dwp: Include dwo name even when the input is a dwo 2022-07-28 20:24:05 +00:00
DebugInfo [Debuginfo][DWARF][NFC] Add paired methods working with DWARFDebugInfoEntry. 2022-07-29 16:40:17 +03:00
Debuginfod [llvm] Use value instead of getValue (NFC) 2022-07-13 23:11:56 -07:00
Demangle [MicrosoftDemangle] Set error to true when returning nullptr. 2022-06-08 17:18:09 -07:00
ExecutionEngine [IntelJITEvents] Add missing include. 2022-08-02 08:45:14 +09:00
Extensions
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FileCheck [llvm][FileCheck] Fix unit tests failures with EXPENSIVE_CHECKS 2022-07-25 08:19:28 +00:00
Frontend Add support for lowering simd if clause to LLVM IR 2022-08-01 04:43:32 -05:00
FuzzMutate
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Fuzzer
…
IR [IRBuilder] Handle constexpr-bitcast for IRBuilder::CreateThreadLocalAddress 2022-08-03 11:13:49 +08:00
IRReader
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InterfaceStub [llvm] Use value instead of getValue (NFC) 2022-07-13 23:11:56 -07:00
LTO [libLTO] Set data-sections by default in libLTO. 2022-07-27 09:39:39 -05:00
LineEditor Use drop_begin (NFC) 2022-07-31 15:17:09 -07:00
Linker [IR] Allow absence for Min module flags and make AArch64 BTI/PAC-RET flags backward compatible 2022-07-18 09:35:12 -07:00
MC Use drop_begin (NFC) 2022-07-31 15:17:09 -07:00
MCA [MCA] Allow mca::Instruction-s to be recycled and reused 2022-06-24 15:39:51 -07:00
ObjCopy Revert D130458 "[llvm-objcopy] Support --{,de}compress-debug-sections for zstd" 2022-07-29 15:46:51 -07:00
Object [AIX] support read global symbol of big archive 2022-07-18 10:43:30 -04:00
ObjectYAML [LoongArch] Parse LoongArch base ABI in ObjectYAML and llvm-readobj 2022-07-25 20:40:57 +08:00
Option
…
Passes [StandardInstrumentations] Assign names to basic blocks without names 2022-08-02 11:04:01 -07:00
ProfileData [llvm-cov] Improve error message by printing the object file name that produces error 2022-07-21 11:26:51 -07:00
Remarks Don't use Optional::hasValue (NFC) 2022-06-20 20:05:16 -07:00
Support CommandLine: add and use cl::SubCommand::get{All,TopLevel} 2022-08-02 23:49:16 +02:00
TableGen [TableGen] Drop an unnecessary const from a return type (NFC) 2022-07-23 11:30:23 -07:00
Target [RISCV] Use InstVisitor in RISCVCodeGenPrepare. NFC 2022-08-02 21:19:30 -07:00
Testing [llvm] Use value_or instead of getValueOr (NFC) 2022-06-18 23:07:11 -07:00
TextAPI
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ToolDrivers [llvm-lib] Ignore /VERBOSE flag 2022-07-21 10:06:13 -07:00
Transforms [llvm][NFC] Refactor code to use ProfDataUtils 2022-08-03 00:09:45 +00:00
WindowsDriver [llvm] Don't use Optional::hasValue (NFC) 2022-06-25 21:42:52 -07:00
WindowsManifest
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XRay
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CMakeLists.txt
…