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-rw-r--r--lib/Target/R600/SIInstrInfo.cpp20
1 files changed, 0 insertions, 20 deletions
diff --git a/lib/Target/R600/SIInstrInfo.cpp b/lib/Target/R600/SIInstrInfo.cpp
index 8343362d116..1a0010c03dc 100644
--- a/lib/Target/R600/SIInstrInfo.cpp
+++ b/lib/Target/R600/SIInstrInfo.cpp
@@ -326,26 +326,6 @@ SIInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
unsigned Opcode;
const int16_t *SubIndices;
- if (AMDGPU::M0 == DestReg) {
- // Check if M0 isn't already set to this value
- for (MachineBasicBlock::reverse_iterator E = MBB.rend(),
- I = MachineBasicBlock::reverse_iterator(MI); I != E; ++I) {
-
- if (!I->definesRegister(AMDGPU::M0))
- continue;
-
- unsigned Opc = I->getOpcode();
- if (Opc != TargetOpcode::COPY && Opc != AMDGPU::S_MOV_B32)
- break;
-
- if (!I->readsRegister(SrcReg))
- break;
-
- // The copy isn't necessary
- return;
- }
- }
-
if (AMDGPU::SReg_32RegClass.contains(DestReg)) {
assert(AMDGPU::SReg_32RegClass.contains(SrcReg));
BuildMI(MBB, MI, DL, get(AMDGPU::S_MOV_B32), DestReg)