[llvm] [NFC][AMDGPU] Remove an obsolete debug assertion trigger (PR #127357)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Shilei Tian (shiltian)

<details>
<summary>Changes</summary>

The removed code block was previously used to trigger an assertion, which has
since been fixed. However, its presence could cause inconsistent check lines
between debug (or assertion-enabled) builds and release builds. The fact that no
test updates were needed further confirms that this issue no longer exists.

Fixes SWDEV-515712.

---
Full diff: https://github.com/llvm/llvm-project/pull/127357.diff


1 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/SILowerI1Copies.cpp (-4) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/SILowerI1Copies.cpp b/llvm/lib/Target/AMDGPU/SILowerI1Copies.cpp
index 5805ec658fd61..e177baa1382c7 100644
--- a/llvm/lib/Target/AMDGPU/SILowerI1Copies.cpp
+++ b/llvm/lib/Target/AMDGPU/SILowerI1Copies.cpp
@@ -512,10 +512,6 @@ bool PhiLoweringHelper::lowerPhis() {
              DT->getNode(RHS.Block)->getDFSNumIn();
     });
 
-#ifndef NDEBUG
-    PhiRegisters.insert(DstReg);
-#endif
-
     // Phis in a loop that are observed outside the loop receive a simple but
     // conservatively correct treatment.
     std::vector<MachineBasicBlock *> DomBlocks = {&MBB};

``````````

</details>


https://github.com/llvm/llvm-project/pull/127357