[AMDGPU] Remove unnecessary untieRegOperand

[jayfoad]

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

[llvmbot]

@llvm/pr-subscribers-backend-amdgpu

Author: Jay Foad (jayfoad)

Changes

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 --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);
     }

[perlfu]

LGTM

[llvm-ci]

LLVM Buildbot has detected a new failure on builder clang-x86_64-debian-fast running on gribozavr4 while building llvm at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/56/builds/6805

Here is the relevant piece of the build log for the reference

Step 6 (test-build-unified-tree-check-all) failure: 1200 seconds without output running [b'ninja', b'check-all'], attempting to kill
...
PASS: LLVM :: tools/llvm-reduce/remove-instructions.ll (80056 of 80066)
PASS: lit :: googletest-timeout.py (80057 of 80066)
PASS: lit :: selecting.py (80058 of 80066)
PASS: lit :: shtest-timeout.py (80059 of 80066)
PASS: LLVM-Unit :: Support/./SupportTests/127/173 (80060 of 80066)
PASS: lit :: max-time.py (80061 of 80066)
PASS: lit :: shtest-shell.py (80062 of 80066)
PASS: lit :: shtest-define.py (80063 of 80066)
PASS: LLVM-Unit :: Support/./SupportTests/125/173 (80064 of 80066)
PASS: LLVM :: tools/llvm-reduce/parallel-workitem-kill.ll (80065 of 80066)
command timed out: 1200 seconds without output running [b'ninja', b'check-all'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1415.449462