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-rw-r--r--llvm/lib/Target/AMDGPU/SIFrameLowering.cpp5
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIFrameLowering.cpp b/llvm/lib/Target/AMDGPU/SIFrameLowering.cpp
index 5c219c8e740..37a47b45c18 100644
--- a/llvm/lib/Target/AMDGPU/SIFrameLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIFrameLowering.cpp
@@ -184,8 +184,9 @@ void SIFrameLowering::emitPrologue(MachineFunction &MF,
// Pick the first unallocated SGPR. Be careful not to pick an alias of the
// scratch descriptor, since we haven’t added its uses yet.
if (!MRI.isPhysRegUsed(Reg)) {
- assert(MRI.isAllocatable(Reg) &&
- !TRI->isSubRegisterEq(ScratchRsrcReg, Reg));
+ if (!MRI.isAllocatable(Reg) ||
+ TRI->isSubRegisterEq(ScratchRsrcReg, Reg))
+ continue;
MRI.replaceRegWith(ScratchWaveOffsetReg, Reg);
ScratchWaveOffsetReg = Reg;
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