Restore isRenamable in isBackwardPropagatableCopy

BeMg · BeMg · commit 9b4a3fdf87ed · 2024-08-26T19:09:36.000-07:00
diff --git a/llvm/lib/CodeGen/MachineCopyPropagation.cpp b/llvm/lib/CodeGen/MachineCopyPropagation.cpp
@@ -983,7 +983,7 @@ static bool isBackwardPropagatableCopy(const DestSourcePair &CopyOperands,
   if (MRI.isReserved(Def) || MRI.isReserved(Src))
     return false;
 
-  return CopyOperands.Source->isKill();
+  return CopyOperands.Source->isRenamable() && CopyOperands.Source->isKill();
 }
 
 void MachineCopyPropagation::propagateDefs(MachineInstr &MI) {

Original file line number	Diff line number	Diff line change
`@@ -983,7 +983,7 @@ static bool isBackwardPropagatableCopy(const DestSourcePair &CopyOperands,`
`983`	`983`	`if (MRI.isReserved(Def) \|\| MRI.isReserved(Src))`
`984`	`984`	`return false;`
`985`	`985`
`986`		`- return CopyOperands.Source->isKill();`
	`986`	`+ return CopyOperands.Source->isRenamable() && CopyOperands.Source->isKill();`
`987`	`987`	`}`
`988`	`988`
`989`	`989`	`void MachineCopyPropagation::propagateDefs(MachineInstr &MI) {`