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[AArch64] Use canonical copy idiom

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Use only the canonical form of the alias for register transfers in the
`IsCopyIdiomPred` predicate.

llvm-svn: 349685
This commit is contained in:
Evandro Menezes 2018-12-19 22:24:31 +00:00
parent 045fafaf88
commit c473ea1899
1 changed files with 1 additions and 3 deletions
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4
lib/Target/AArch64/AArch64SchedPredicates.td
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@ -295,9 +295,7 @@ def IsCopyIdiomFn : TIIPredicate<"isCopyIdiom",
CheckIsRegOperand<2>,
CheckAny<
[CheckRegOperand<1, WZR>,
CheckRegOperand<1, XZR>,
CheckRegOperand<2, WZR>,
CheckRegOperand<2, XZR>]>,
CheckRegOperand<1, XZR>]>,
CheckShiftBy0]>>>],
MCReturnStatement<FalsePred>>>;
def IsCopyIdiomPred : MCSchedPredicate<IsCopyIdiomFn>;