[PATCH] D102675: [SLP] Fix "gathering" of vector values

[Alexey Bataev via Phabricator via llvm-commits]

ABataev added inline comments.


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Comment at: llvm/test/Transforms/SLPVectorizer/X86/insert-element-build-vector-inseltpoison.ll:149-156
+; MINTREESIZE-NEXT:    [[Q4:%.*]] = fadd float [[Q0]], [[Q1]]
+; MINTREESIZE-NEXT:    [[Q5:%.*]] = fadd float [[Q2]], [[Q3]]
+; MINTREESIZE-NEXT:    [[TMP3:%.*]] = insertelement <2 x float> poison, float [[Q4]], i32 0
+; MINTREESIZE-NEXT:    [[TMP4:%.*]] = insertelement <2 x float> [[TMP3]], float [[Q5]], i32 1
+; MINTREESIZE-NEXT:    [[Q6:%.*]] = fadd float [[Q4]], [[Q5]]
+; MINTREESIZE-NEXT:    [[TMP5:%.*]] = insertelement <2 x float> poison, float [[Q6]], i32 0
+; MINTREESIZE-NEXT:    [[TMP6:%.*]] = insertelement <2 x float> [[TMP5]], float [[Q5]], i32 1
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Why are the instructions reordered if no vectorization should happen?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D102675/new/

https://reviews.llvm.org/D102675