[llvm] 4be3fc3 - [SLP][NFC]Cleanup up operands of the removed insertelements, NFC.

[Alexey Bataev via llvm-commits]

Author: Alexey Bataev
Date: 2022-06-30T17:51:43-07:00
New Revision: 4be3fc35aa8b27494968e9a52eb0afa0672d98e7

URL: https://github.com/llvm/llvm-project/commit/4be3fc35aa8b27494968e9a52eb0afa0672d98e7
DIFF: https://github.com/llvm/llvm-project/commit/4be3fc35aa8b27494968e9a52eb0afa0672d98e7.diff

LOG: [SLP][NFC]Cleanup up operands of the removed insertelements, NFC.

Replace all operands of the insertelement instruction, replaced by
shuffles, by poisons to avoid false-positive reports about incorrect function.

Added: 
    

Modified: 
    llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index a958c36969d53..019a09665a679 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -8827,6 +8827,8 @@ BoUpSLP::vectorizeTree(ExtraValueToDebugLocsMap &ExternallyUsedValues) {
     }
     LastInsert->replaceAllUsesWith(NewInst);
     for (InsertElementInst *IE : reverse(ShuffledInserts[I].InsertElements)) {
+      IE->replaceUsesOfWith(IE->getOperand(0),
+                            PoisonValue::get(IE->getOperand(0)->getType()));
       IE->replaceUsesOfWith(IE->getOperand(1),
                             PoisonValue::get(IE->getOperand(1)->getType()));
       eraseInstruction(IE);