1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp b/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp
index b2edb362b80..1f8b744155d 100644
--- a/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp
+++ b/llvm/lib/Target/AMDGPU/SIFoldOperands.cpp
@@ -1093,6 +1093,13 @@ void SIFoldOperands::foldInstOperand(MachineInstr &MI,
     Copy->addImplicitDefUseOperands(*MF);
 
   for (FoldCandidate &Fold : FoldList) {
+    if (Fold.isReg() && Register::isVirtualRegister(Fold.OpToFold->getReg())) {
+      Register Reg = Fold.OpToFold->getReg();
+      MachineInstr *DefMI = Fold.OpToFold->getParent();
+      if (DefMI->readsRegister(AMDGPU::EXEC, TRI) &&
+          execMayBeModifiedBeforeUse(*MRI, Reg, *DefMI, *Fold.UseMI))
+        continue;
+    }
     if (updateOperand(Fold, *TII, *TRI, *ST)) {
       // Clear kill flags.
       if (Fold.isReg()) {