[llvm] [RemoveDIs] Use getFirstNonPHIIt to fix crash #85472 (PR #85618)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Orlando Cazalet-Hyams (OCHyams)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/85618.diff


1 Files Affected:

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


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp b/llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
index 0edbbf7cb0af54..f1cc4b524460e2 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
@@ -1987,7 +1987,7 @@ bool AMDGPUCodeGenPrepareImpl::visitPHINode(PHINode &I) {
   for (VectorSlice &S : Slices) {
     // We need to reset the build on each iteration, because getSlicedVal may
     // have inserted something into I's BB.
-    B.SetInsertPoint(I.getParent()->getFirstNonPHI());
+    B.SetInsertPoint(I.getParent()->getFirstNonPHIIt());
     S.NewPHI = B.CreatePHI(S.Ty, I.getNumIncomingValues());
 
     for (const auto &[Idx, BB] : enumerate(I.blocks())) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/85618