[llvm] [InstCombine] Only fold extract element to trunc if vector `hasOneUse` (PR #115627)

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github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff 0ac4821b718dd14e80d3856efa532d52df6878bb 149078c6807da8f0670123a855f7b6c173675e9b --extensions cpp -- llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp b/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
index 7d1d053edd..76878ce4ff 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
@@ -205,7 +205,8 @@ Instruction *InstCombinerImpl::foldBitcastExtElt(ExtractElementInst &Ext) {
     if (IsBigEndian)
       ExtIndexC = NumElts.getKnownMinValue() - 1 - ExtIndexC;
     unsigned ShiftAmountC = ExtIndexC * DestWidth;
-    if ((!ShiftAmountC || isDesirableIntType(X->getType()->getPrimitiveSizeInBits())) &&
+    if ((!ShiftAmountC ||
+         isDesirableIntType(X->getType()->getPrimitiveSizeInBits())) &&
         Ext.getVectorOperand()->hasOneUse()) {
       if (ShiftAmountC)
         X = Builder.CreateLShr(X, ShiftAmountC, "extelt.offset");

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https://github.com/llvm/llvm-project/pull/115627