forked from OSchip/llvm-project
79 lines
2.1 KiB
LLVM
79 lines
2.1 KiB
LLVM
|
; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -verify-machineinstrs | FileCheck %s
|
||
|
|
|
||
|
|
; CHECK-LABEL: test1:
|
||
|
|
; CHECK: fadd d1, d1, d1
|
||
|
|
; CHECK: fsub d0, d0, d1
|
||
|
|
define double @test1(double %a, double %b) local_unnamed_addr #0 {
|
||
|
|
entry:
|
||
|
|
%mul = fmul double %b, -2.000000e+00
|
||
|
|
%add1 = fadd double %a, %mul
|
||
|
|
ret double %add1
|
||
|
|
}
|
||
|
|
|
||
|
|
; DAGCombine will canonicalize 'a - 2.0*b' to 'a + -2.0*b'
|
||
|
|
; CHECK-LABEL: test2:
|
||
|
|
; CHECK: fadd d1, d1, d1
|
||
|
|
; CHECK: fsub d0, d0, d1
|
||
|
|
define double @test2(double %a, double %b) local_unnamed_addr #0 {
|
||
|
|
entry:
|
||
|
|
%mul = fmul double %b, 2.000000e+00
|
||
|
|
%add1 = fsub double %a, %mul
|
||
|
|
ret double %add1
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK-LABEL: test3:
|
||
|
|
; CHECK: fmul d0, d0, d1
|
||
|
|
; CHECK: fadd d1, d2, d2
|
||
|
|
; CHECK: fsub d0, d0, d1
|
||
|
|
define double @test3(double %a, double %b, double %c) local_unnamed_addr #0 {
|
||
|
|
entry:
|
||
|
|
%mul = fmul double %a, %b
|
||
|
|
%mul1 = fmul double %c, 2.000000e+00
|
||
|
|
%sub = fsub double %mul, %mul1
|
||
|
|
ret double %sub
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK-LABEL: test4:
|
||
|
|
; CHECK: fmul d0, d0, d1
|
||
|
|
; CHECK: fadd d1, d2, d2
|
||
|
|
; CHECK: fsub d0, d0, d1
|
||
|
|
define double @test4(double %a, double %b, double %c) local_unnamed_addr #0 {
|
||
|
|
entry:
|
||
|
|
%mul = fmul double %a, %b
|
||
|
|
%mul1 = fmul double %c, -2.000000e+00
|
||
|
|
%add2 = fadd double %mul, %mul1
|
||
|
|
ret double %add2
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK-LABEL: test5:
|
||
|
|
; CHECK: fadd v1.4s, v1.4s, v1.4s
|
||
|
|
; CHECK: fsub v0.4s, v0.4s, v1.4s
|
||
|
|
define <4 x float> @test5(<4 x float> %a, <4 x float> %b) {
|
||
|
|
%mul = fmul <4 x float> %b, <float -2.0, float -2.0, float -2.0, float -2.0>
|
||
|
|
%add = fadd <4 x float> %a, %mul
|
||
|
|
ret <4 x float> %add
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK-LABEL: test6:
|
||
|
|
; CHECK: fadd v1.4s, v1.4s, v1.4s
|
||
|
|
; CHECK: fsub v0.4s, v0.4s, v1.4s
|
||
|
|
define <4 x float> @test6(<4 x float> %a, <4 x float> %b) {
|
||
|
|
%mul = fmul <4 x float> %b, <float 2.0, float 2.0, float 2.0, float 2.0>
|
||
|
|
%add = fsub <4 x float> %a, %mul
|
||
|
|
ret <4 x float> %add
|
||
|
|
}
|
||
|
|
|
||
|
|
; Don't fold (fadd A, (fmul B, -2.0)) -> (fsub A, (fadd B, B)) if the fmul has
|
||
|
|
; multiple uses.
|
||
|
|
; CHECK-LABEL: test7:
|
||
|
|
; CHECK: fmul
|
||
|
|
define double @test7(double %a, double %b) local_unnamed_addr #0 {
|
||
|
|
entry:
|
||
|
|
%mul = fmul double %b, -2.000000e+00
|
||
|
|
%add1 = fadd double %a, %mul
|
||
|
|
call void @use(double %mul)
|
||
|
|
ret double %add1
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @use(double)
|