[llvm] [VPlan] Model FOR extract of exit value in VPlan. (PR #93395)
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Mon Jun 3 02:15:39 PDT 2024
================
@@ -558,6 +560,29 @@ Value *VPInstruction::generatePerPart(VPTransformState &State, unsigned Part) {
return ReducedPartRdx;
}
+ case VPInstruction::ExtractFromEnd: {
+ if (Part != 0)
+ return State.get(this, 0, /*IsScalar*/ true);
+
+ auto *CI = cast<ConstantInt>(getOperand(1)->getLiveInIRValue());
----------------
fhahn wrote:
Added a comment to where the opcode is defined, thanks. I kept the code general for now, with the constraints that the lane to extract must be <= VF when vectorizing or <= UF otherwise.
https://github.com/llvm/llvm-project/pull/93395
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