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llvm-6502/test/Transforms/Reassociate/fast-AgressiveSubMove.ll
Chad Rosier 3b41039163 [Reassociation] Add support for reassociation with unsafe algebra.
Vector instructions are (still) not supported for either integer or floating
point.  Hopefully, that work will be landed shortly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215647 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-14 15:23:01 +00:00

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LLVM

; RUN: opt < %s -reassociate -S | FileCheck %s
define float @test1(float %A) {
; CHECK-LABEL: test1
; CHECK-NEXT: %X = fadd float 1.000000e+00, %A
; CHECK-NEXT: %Y = fadd float 1.000000e+00, %A
; CHECK-NEXT: %r = fsub float %X, %Y
; CHECK-NEXT: ret float %r
%X = fadd float %A, 1.000000e+00
%Y = fadd float %A, 1.000000e+00
%r = fsub float %X, %Y
ret float %r
}
define float @test2(float %A) {
; CHECK-LABEL: test2
; CHECK-NEXT: ret float 0.000000e+00
%X = fadd fast float 1.000000e+00, %A
%Y = fadd fast float 1.000000e+00, %A
%r = fsub fast float %X, %Y
ret float %r
}