AMDGPU/SI: The SIShrinkInstructions pass should only fold immediates with one use

[oota-llvm.git] / lib / Target / AMDGPU / SIShrinkInstructions.cpp

diff --git a/lib/Target/AMDGPU/SIShrinkInstructions.cpp b/lib/Target/AMDGPU/SIShrinkInstructions.cpp
index 51e72cdb5f9ed289b5ed585f5c93e5cbeebe2d81..cb9d7f7c59dbf59cfd40d2061e23d9bcdf04b98b 100644 (file)
--- a/lib/Target/AMDGPU/SIShrinkInstructions.cpp
+++ b/lib/Target/AMDGPU/SIShrinkInstructions.cpp
@@ -149,7 +149,7 @@ static void foldImmediates(MachineInstr &MI, const SIInstrInfo *TII,
     return;
 
   // Try to fold Src0
-  if (Src0.isReg()) {
+  if (Src0.isReg() && MRI.hasOneUse(Src0.getReg())) {
     unsigned Reg = Src0.getReg();
     MachineInstr *Def = MRI.getUniqueVRegDef(Reg);
     if (Def && Def->isMoveImmediate()) {