[llvm] [VPlan] Add VPInstruction to unpack vector values to scalars. (PR #155670)

[Florian Hahn via llvm-commits]

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@@ -1189,6 +1189,15 @@ static void simplifyRecipe(VPRecipeBase &R, VPTypeAnalysis &TypeInfo) {
     return;
   }
 
+  VPValue *Idx;
+  if (match(&R, m_VPInstruction<Instruction::ExtractElement>(m_BuildVector(),
+                                                             m_VPValue(Idx)))) {
+    auto *BuildVector = cast<VPInstruction>(R.getOperand(0));
+    Def->replaceAllUsesWith(BuildVector->getOperand(
+        dyn_cast<ConstantInt>(Idx->getLiveInIRValue())->getZExtValue()));
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fhahn wrote:

updated, thanks

https://github.com/llvm/llvm-project/pull/155670