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[VPlan] Use one VPWidenRecipe per original IR instruction. (NFC).

Authored by fhahn on Mar 29 2020, 3:35 AM.

Description

[VPlan] Use one VPWidenRecipe per original IR instruction. (NFC).

This patch changes VPWidenRecipe to only store a single original IR
instruction. This is the first required step towards modeling it's
operands as VPValues and also towards breaking it up into a
VPInstruction.

Discussed as part of D74695.

Reviewers: Ayal, gilr, rengolin

Reviewed By: gilr

Differential Revision: https://reviews.llvm.org/D76988

Details

Committed
fhahnMar 29 2020, 5:47 AM
Reviewer
gilr
Differential Revision
D76988: [VPlan] Use on VPWidenRecipe per original IR instruction. (NFC).
Parents
rG6ba63510720f: [PostOrderIterator] Use SmallVector to store stack; NFC
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