Fix the translation error of the COPY instruction in IR. Previously,
the COPY instruction for float registers would be translated into vmv incorrectly.
This is because the GPRF class inherits from the GPR class, so float registers
were also considered GPR. Now an additional check has been added to translate
COPY instructions accurately.
There are two stacks in ventus for registers spill, SGPRSpill and VGPRSpill,
SGPRSpill is for global/constant memory related GPR registers spill, VGPRSpill
is for private/shared memory related VGPR registers spill
Initially implemented 2 stacks support for sGPR spill/restore stack and per-thread stack,
but stack size calculation is computed as a sum of 2 stacks(this works but wastes lot of
spaces).
Now TP register is used as per-thread stack pointer, SP register is used for sGPR spill/restore.
Clean up RVV related stack frame code etc.
FIXME: The stack pointer RISCV::X4 for vALU is not yet correctly used, but related infrastructure
should work(MFI.isEntryFunction() is used to check RISCV::X2 or RISCV::X4 to be used as stack pointer).
This patch mechanically replaces None with std::nullopt where the
compiler would warn if None were deprecated. The intent is to reduce
the amount of manual work required in migrating from Optional to
std::optional.
This is part of an effort to migrate from llvm::Optional to
std::optional:
https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716
To check reassociation correctness for RISCV, we must ensure that the root and
it's sibling have equal rounding modes (for floating point instructions).
`hasReassociableSibling` is a good place to make additional target-dependend
checks.
This patch allows us to enable default machine combiner mechanism to gather
reassociation candidates on RISCV.
Differential Revision: https://reviews.llvm.org/D138302
This patch add the support of RISCV Zca ext
`Zca` is a subset of C extension instructions that are compatible with the Zc extension.
So this patch implements Zca code generation with reference to the C extension and sets the 2-byte alignment for the Zca extension, just like C extension does.
Reviewed By: craig.topper
Differential Revision: https://reviews.llvm.org/D130483
This patch adds tranformation of fmul+fadd/fsub chains to fused multiply
instructions:
* fmul+fadd->fmadd
* fmul+fsub->fmsub/fnmsub
We also will try to combine these instructions if the fmul has more than one use
and cannot be deleted. However, removing the dependence between fmul and fadd can
still be profitable, and we rely on machine combiner approximations of scheduling.
Differential Revision: https://reviews.llvm.org/D136764
sifive-7-series has macrofusion support to convert a branch over
a single instruction into a conditional instruction. This can be
an improvement if the branch is hard to predict.
This patch adds support for the most basic case, a branch over a
move instruction. This is implemented as a pseudo instruction so
we can hide the control flow until all code motion passes complete.
I've disabled a recent select optimization if this feature is enabled
in the subtarget.
Related gcc patch for the same optimization https://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg211045.html
Reviewed By: reames
Differential Revision: https://reviews.llvm.org/D135814
This is a non-trivial property relied upon by D135396. I wrote this to convince myself it was true.
Differential Revision: https://reviews.llvm.org/D135403
This is a refactor for another patch. For now we move the vreg
creation to the caller.
Reviewed By: frasercrmck
Differential Revision: https://reviews.llvm.org/D135008
Various bits of existing code assume the presence of one operand implies the presence of another. Add verifier rules to catch violations.
Differential Revision: https://reviews.llvm.org/D133810
This code was written as if it lived in the MC layer instead of
the CodeGen layer. We get the MCInstrDesc directly from MachineInstr.
And we can use RISCVSubtarget::is64Bit instead of going to the
Triple.
Differential Revision: https://reviews.llvm.org/D133905
zhoujingya
zhoujingya
Aries