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R600/SI: Fix allocating flat_scr_lo / flat_scr_hi

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Only the super register flat_scr was marked as reserved,
so in some cases with high register usage it would still
try to allocate the subregisters.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222737 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2014-11-25 07:53:06 +00:00
parent c3da97ac99
commit 87926dfe7e
1 changed files with 2 additions and 0 deletions
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2
lib/Target/R600/SIRegisterInfo.cpp
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@ -40,6 +40,8 @@ BitVector SIRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
Reserved.set(AMDGPU::INDIRECT_BASE_ADDR);
Reserved.set(AMDGPU::FLAT_SCR);
Reserved.set(AMDGPU::FLAT_SCR_LO);
Reserved.set(AMDGPU::FLAT_SCR_HI);
// Reserve some VGPRs to use as temp registers in case we have to spill VGPRs
Reserved.set(AMDGPU::VGPR255);