[llvm] r349685 - [AArch64] Use canonical copy idiom

[Evandro Menezes via llvm-commits]

Author: evandro
Date: Wed Dec 19 14:24:31 2018
New Revision: 349685

URL: http://llvm.org/viewvc/llvm-project?rev=349685&view=rev
Log:
[AArch64] Use canonical copy idiom

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

Modified:
    llvm/trunk/lib/Target/AArch64/AArch64SchedPredicates.td

Modified: llvm/trunk/lib/Target/AArch64/AArch64SchedPredicates.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AArch64/AArch64SchedPredicates.td?rev=349685&r1=349684&r2=349685&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AArch64/AArch64SchedPredicates.td (original)
+++ llvm/trunk/lib/Target/AArch64/AArch64SchedPredicates.td Wed Dec 19 14:24:31 2018
@@ -295,9 +295,7 @@ def IsCopyIdiomFn     : TIIPredicate<"is
                                                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>;