[llvm] [AMDGPU] Remove unnecessary untieRegOperand (PR #107695)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Jay Foad (jayfoad)

<details>
<summary>Changes</summary>

As far as I can tell, V_SET_INACTIVE has never had tied operands.


---
Full diff: https://github.com/llvm/llvm-project/pull/107695.diff


1 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp (-1) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp b/llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp
index bc4b1936cb7e38..f9d7ead4ff3ecc 100644
--- a/llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp
+++ b/llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp
@@ -1534,7 +1534,6 @@ bool SIWholeQuadMode::lowerCopyInstrs() {
       if (MI->getOperand(2).isReg())
         RecomputeReg = MI->getOperand(2).getReg();
       MI->removeOperand(2);
-      MI->untieRegOperand(1);
     } else {
       assert(MI->getNumExplicitOperands() == 2);
     }

``````````

</details>


https://github.com/llvm/llvm-project/pull/107695