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| author | Matt Arsenault <Matthew.Arsenault@amd.com> | 2023-07-27 08:55:43 -0400 |
|---|---|---|
| committer | Matt Arsenault <Matthew.Arsenault@amd.com> | 2023-08-11 10:29:53 -0400 |
| commit | 8f18cf77e79e1f1534d97220a14d684095f7b92a (patch) | |
| tree | ce7aa52d90910ea5214bcc1c25dafaaccff3af58 /llvm/lib/CodeGen/MachineInstr.cpp | |
| parent | 1030483561d6abf0a160bca324509d0c7ef4e398 (diff) | |
| download | llvm-8f18cf77e79e1f1534d97220a14d684095f7b92a.zip llvm-8f18cf77e79e1f1534d97220a14d684095f7b92a.tar.gz llvm-8f18cf77e79e1f1534d97220a14d684095f7b92a.tar.bz2 | |
AMDGPU: Check for implicit defs before constant folding instruction
Can't delete the constant folded instruction if scc is used.
Fixes #63986
https://reviews.llvm.org/D157504
Diffstat (limited to 'llvm/lib/CodeGen/MachineInstr.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineInstr.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp index 0c4353f..13673fb 100644 --- a/llvm/lib/CodeGen/MachineInstr.cpp +++ b/llvm/lib/CodeGen/MachineInstr.cpp @@ -1497,6 +1497,16 @@ bool MachineInstr::allDefsAreDead() const { return true; } +bool MachineInstr::allImplicitDefsAreDead() const { + for (const MachineOperand &MO : implicit_operands()) { + if (!MO.isReg() || MO.isUse()) + continue; + if (!MO.isDead()) + return false; + } + return true; +} + /// copyImplicitOps - Copy implicit register operands from specified /// instruction to this instruction. void MachineInstr::copyImplicitOps(MachineFunction &MF, |