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llvm-project/llvm/test/CodeGen/PowerPC/vsx-self-copy.ll

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[PowerPC] Use a small cleanup pass to remove VSX self copies As explained in r204976, because of how the allocation of VSX registers interacts with the call-lowering code, we sometimes end up generating self VSX copies. Specifically, things like this: %VSL2<def> = COPY %F2, %VSL2<imp-use,kill> (where %F2 is really a sub-register of %VSL2, and so this copy is a nop) This adds a small cleanup pass to remove these prior to post-RA scheduling. llvm-svn: 204980
2014-03-28 07:12:31 +08:00
; RUN: llc -mcpu=pwr7 -mattr=+vsx < %s | FileCheck %s
[PowerPC]Update Power VSX test cases to also test fast-isel Update of some of the VSX test cases for Power to check fast-isel codegen as well as the regular codegen. http://reviews.llvm.org/D6357 llvm-svn: 223509
2014-12-06 04:32:05 +08:00
; RUN: llc -mcpu=pwr7 -mattr=+vsx -fast-isel -O0 < %s | FileCheck %s
[PowerPC] Use a small cleanup pass to remove VSX self copies As explained in r204976, because of how the allocation of VSX registers interacts with the call-lowering code, we sometimes end up generating self VSX copies. Specifically, things like this: %VSL2<def> = COPY %F2, %VSL2<imp-use,kill> (where %F2 is really a sub-register of %VSL2, and so this copy is a nop) This adds a small cleanup pass to remove these prior to post-RA scheduling. llvm-svn: 204980
2014-03-28 07:12:31 +08:00
target datalayout = "E-m:e-i64:64-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
define double @takFP(double %x, double %y, double %z) #0 {
entry:
br i1 undef, label %if.then, label %return
if.then: ; preds = %if.then, %entry
%x.tr16 = phi double [ %call, %if.then ], [ %x, %entry ]
%call = tail call double @takFP(double undef, double undef, double undef)
%call4 = tail call double @takFP(double undef, double %x.tr16, double undef)
%cmp = fcmp olt double undef, %call
br i1 %cmp, label %if.then, label %return
return: ; preds = %if.then, %entry
%z.tr.lcssa = phi double [ %z, %entry ], [ %call4, %if.then ]
ret double %z.tr.lcssa
; CHECK: @takFP
; CHECK-NOT: xxlor 0, 0, 0
; CHECK: blr
}
attributes #0 = { nounwind readnone }
attributes #1 = { nounwind }