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