diff options
Diffstat (limited to 'llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp index ef6ad4ad0c8..4a3fbb4593b 100644 --- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp +++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp @@ -207,7 +207,11 @@ BitVector SIRegisterInfo::getReservedRegs(const MachineFunction &MF) const { assert(!isSubRegister(ScratchRSrcReg, ScratchWaveOffsetReg)); } + // We have to assume the SP is needed in case there are calls in the function, + // which is detected after the function is lowered. If we aren't really going + // to need SP, don't bother reserving it. unsigned StackPtrReg = MFI->getStackPtrOffsetReg(); + if (StackPtrReg != AMDGPU::NoRegister) { reserveRegisterTuples(Reserved, StackPtrReg); assert(!isSubRegister(ScratchRSrcReg, StackPtrReg)); |
