diff options
| -rw-r--r-- | llvm/lib/Target/AMDGPU/SIFoldOperands.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp b/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp index a141a22c53f..f24510b1866 100644 --- a/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp +++ b/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp @@ -1468,15 +1468,16 @@ bool SIFoldOperands::runOnMachineFunction(MachineFunction &MF) { tryFoldInst(TII, &MI); if (!TII->isFoldableCopy(MI)) { + // Saw an unknown clobber of m0, so we no longer know what it is. + if (CurrentKnownM0Val && MI.modifiesRegister(AMDGPU::M0, TRI)) + CurrentKnownM0Val = nullptr; + // TODO: Omod might be OK if there is NSZ only on the source // instruction, and not the omod multiply. if (IsIEEEMode || (!HasNSZ && !MI.getFlag(MachineInstr::FmNsz)) || !tryFoldOMod(MI)) tryFoldClamp(MI); - // Saw an unknown clobber of m0, so we no longer know what it is. - if (CurrentKnownM0Val && MI.modifiesRegister(AMDGPU::M0, TRI)) - CurrentKnownM0Val = nullptr; continue; } |
