forked from OSchip/llvm-project
157 lines
4.2 KiB
LLVM
157 lines
4.2 KiB
LLVM
; RUN: opt -reassociate -gvn -S < %s | FileCheck %s
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; (x + 0.1234 * y) * (x + -0.1234 * y) -> (x + 0.1234 * y) * (x - 0.1234 * y)
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define double @test1(double %x, double %y) {
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; CHECK-LABEL: @test1
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; CHECK-NEXT: fmul double %y, 1.234000e-01
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; CHECK-NEXT: fadd double %x, %mul
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; CHECK-NEXT: fsub double %x, %mul
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; CHECK-NEXT: fmul double %add{{.*}}, %add{{.*}}
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; CHECK-NEXT: ret double %mul
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%mul = fmul double 1.234000e-01, %y
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%add = fadd double %mul, %x
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%mul1 = fmul double -1.234000e-01, %y
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%add2 = fadd double %mul1, %x
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%mul3 = fmul double %add, %add2
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ret double %mul3
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}
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; (x + -0.1234 * y) * (x + -0.1234 * y) -> (x - 0.1234 * y) * (x - 0.1234 * y)
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define double @test2(double %x, double %y) {
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; CHECK-LABEL: @test2
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; CHECK-NEXT: fmul double %y, 1.234000e-01
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; CHECK-NEXT: fsub double %x, %mul
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; CHECK-NEXT: fmul double %add{{.*}}, %add{{.*}}
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; CHECK-NEXT: ret double %mul
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%mul = fmul double %y, -1.234000e-01
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%add = fadd double %mul, %x
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%mul1 = fmul double %y, -1.234000e-01
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%add2 = fadd double %mul1, %x
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%mul3 = fmul double %add, %add2
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ret double %mul3
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}
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; (x + 0.1234 * y) * (x - -0.1234 * y) -> (x + 0.1234 * y) * (x + 0.1234 * y)
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define double @test3(double %x, double %y) {
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; CHECK-LABEL: @test3
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; CHECK-NEXT: fmul double %y, 1.234000e-01
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; CHECK-NEXT: fadd double %x, %mul
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; CHECK-NEXT: fmul double %add{{.*}}, %add{{.*}}
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; CHECK-NEXT: ret double
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%mul = fmul double %y, 1.234000e-01
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%add = fadd double %mul, %x
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%mul1 = fmul double %y, -1.234000e-01
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%add2 = fsub double %x, %mul1
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%mul3 = fmul double %add, %add2
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ret double %mul3
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}
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; Canonicalize (x - -0.1234 * y)
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define double @test5(double %x, double %y) {
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; CHECK-LABEL: @test5
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; CHECK-NEXT: fmul double %y, 1.234000e-01
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; CHECK-NEXT: fadd double %x, %mul
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; CHECK-NEXT: ret double
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%mul = fmul double -1.234000e-01, %y
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%sub = fsub double %x, %mul
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ret double %sub
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}
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; Don't modify (-0.1234 * y - x)
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define double @test6(double %x, double %y) {
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; CHECK-LABEL: @test6
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; CHECK-NEXT: fmul double %y, -1.234000e-01
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; CHECK-NEXT: fsub double %mul, %x
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; CHECK-NEXT: ret double %sub
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%mul = fmul double -1.234000e-01, %y
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%sub = fsub double %mul, %x
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ret double %sub
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}
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; Canonicalize (-0.1234 * y + x) -> (x - 0.1234 * y)
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define double @test7(double %x, double %y) {
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; CHECK-LABEL: @test7
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; CHECK-NEXT: fmul double %y, 1.234000e-01
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; CHECK-NEXT: fsub double %x, %mul
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; CHECK-NEXT: ret double %add
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%mul = fmul double -1.234000e-01, %y
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%add = fadd double %mul, %x
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ret double %add
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}
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; Canonicalize (y * -0.1234 + x) -> (x - 0.1234 * y)
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define double @test8(double %x, double %y) {
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; CHECK-LABEL: @test8
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; CHECK-NEXT: fmul double %y, 1.234000e-01
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; CHECK-NEXT: fsub double %x, %mul
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; CHECK-NEXT: ret double %add
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%mul = fmul double %y, -1.234000e-01
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%add = fadd double %mul, %x
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ret double %add
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}
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; Canonicalize (x - -0.1234 / y)
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define double @test9(double %x, double %y) {
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; CHECK-LABEL: @test9
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; CHECK-NEXT: fdiv double 1.234000e-01, %y
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; CHECK-NEXT: fadd double %x, %div
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; CHECK-NEXT: ret double
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%div = fdiv double -1.234000e-01, %y
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%sub = fsub double %x, %div
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ret double %sub
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}
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; Don't modify (-0.1234 / y - x)
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define double @test10(double %x, double %y) {
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; CHECK-LABEL: @test10
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; CHECK-NEXT: fdiv double -1.234000e-01, %y
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; CHECK-NEXT: fsub double %div, %x
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; CHECK-NEXT: ret double %sub
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%div = fdiv double -1.234000e-01, %y
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%sub = fsub double %div, %x
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ret double %sub
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}
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; Canonicalize (-0.1234 / y + x) -> (x - 0.1234 / y)
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define double @test11(double %x, double %y) {
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; CHECK-LABEL: @test11
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; CHECK-NEXT: fdiv double 1.234000e-01, %y
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; CHECK-NEXT: fsub double %x, %div
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; CHECK-NEXT: ret double %add
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%div = fdiv double -1.234000e-01, %y
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%add = fadd double %div, %x
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ret double %add
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}
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; Canonicalize (y / -0.1234 + x) -> (x - y / 0.1234)
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define double @test12(double %x, double %y) {
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; CHECK-LABEL: @test12
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; CHECK-NEXT: fdiv double %y, 1.234000e-01
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; CHECK-NEXT: fsub double %x, %div
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; CHECK-NEXT: ret double %add
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%div = fdiv double %y, -1.234000e-01
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%add = fadd double %div, %x
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ret double %add
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}
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; Don't create an NSW violation
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define i4 @test13(i4 %x) {
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; CHECK-LABEL: @test13
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; CHECK-NEXT: %[[mul:.*]] = mul nsw i4 %x, -2
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; CHECK-NEXT: %[[add:.*]] = add i4 %[[mul]], 3
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%mul = mul nsw i4 %x, -2
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%add = add i4 %mul, 3
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ret i4 %add
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}
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