tree 86463821b428df90be7075e25c0a14aea415d77b
parent 6cbd91ea52cbf2b27dc92557cea64f5fd305fcf1
author Florian Hahn <flo@fhahn.com> 1749499152 +0100
committer GitHub <noreply@github.com> 1749499152 +0100
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[VPlan] Add ReductionStartVector VPInstruction. (#142290)

Add a new VPInstruction::ReductionStartVector opcode to create the start
values for wide reductions. This more accurately models the start value
creation in VPlan and simplifies VPReductionPHIRecipe::execute. Down the
line it also allows removing VPReductionPHIRecipe::RdxDesc.

PR: https://github.com/llvm/llvm-project/pull/142290