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This is another step towards ensuring that we produce the optimal code for reductions, but there are other potential benefits as seen in the tests diffs: 1. Memory loads may get scalarized resulting in more efficient code. 2. Memory stores may get scalarized resulting in more efficient code. 3. Complex ops like fdiv/sqrt get scalarized which may be faster instructions depending on uarch. 4. Even simple ops like addss/subss/mulss/roundss may result in faster operation/less frequency throttling when scalarized depending on uarch. The TODO comment suggests 1 or more follow-ups for opcodes that can currently result in regressions. Differential Revision: https://reviews.llvm.org/D58282 llvm-svn: 355130 |
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