Vendor import of llvm-project branch release/21.x llvmorg-21.1.7-0-gcd708029e0b2, a.k.a. 21.1.7 release.vendor/llvm-project/llvmorg-21.1.7-0-gcd708029e0b2

1 files changed, 0 insertions, 10 deletions

diff --git a/llvm/lib/CodeGen/MachineCopyPropagation.cpp b/llvm/lib/CodeGen/MachineCopyPropagation.cpp
index 742de1101faa..620767a39b91 100644
--- a/llvm/lib/CodeGen/MachineCopyPropagation.cpp
+++ b/llvm/lib/CodeGen/MachineCopyPropagation.cpp
@@ -937,16 +937,6 @@ void MachineCopyPropagation::ForwardCopyPropagateBlock(MachineBasicBlock &MBB) {
     if (CopyOperands) {
       Register RegSrc = CopyOperands->Source->getReg();
       Register RegDef = CopyOperands->Destination->getReg();
-      // It's possible that the previous transformations have resulted in a
-      // no-op register move (i.e. one where source and destination registers
-      // are the same and are not referring to a reserved register). If so,
-      // delete it.
-      if (RegSrc == RegDef && !MRI->isReserved(RegSrc)) {
-        MI.eraseFromParent();
-        NumDeletes++;
-        Changed = true;
-        continue;
-      }
 
       if (!TRI->regsOverlap(RegDef, RegSrc)) {
         // Copy is now a candidate for deletion.