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9cb82be410
E.g., ( a / D; b / D ) -> ( recip = 1.0 / D; a * recip; b * recip) A hook is added to allow the target to control whether it needs to do such combine. Reviewed in http://reviews.llvm.org/D6334 llvm-svn: 222510
95 lines
2.6 KiB
LLVM
95 lines
2.6 KiB
LLVM
; RUN: llc -march=aarch64 < %s | FileCheck %s
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; Following test cases check:
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; a / D; b / D; c / D;
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; =>
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; recip = 1.0 / D; a * recip; b * recip; c * recip;
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define void @three_fdiv_float(float %D, float %a, float %b, float %c) #0 {
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; CHECK-LABEL: three_fdiv_float:
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; CHECK: fdiv
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; CHECK-NEXT-NOT: fdiv
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; CHECK: fmul
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; CHECK: fmul
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; CHECK: fmul
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%div = fdiv float %a, %D
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%div1 = fdiv float %b, %D
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%div2 = fdiv float %c, %D
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tail call void @foo_3f(float %div, float %div1, float %div2)
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ret void
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}
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define void @three_fdiv_double(double %D, double %a, double %b, double %c) #0 {
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; CHECK-LABEL: three_fdiv_double:
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; CHECK: fdiv
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; CHECK-NEXT-NOT: fdiv
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; CHECK: fmul
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; CHECK: fmul
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; CHECK: fmul
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%div = fdiv double %a, %D
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%div1 = fdiv double %b, %D
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%div2 = fdiv double %c, %D
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tail call void @foo_3d(double %div, double %div1, double %div2)
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ret void
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}
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define void @three_fdiv_4xfloat(<4 x float> %D, <4 x float> %a, <4 x float> %b, <4 x float> %c) #0 {
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; CHECK-LABEL: three_fdiv_4xfloat:
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; CHECK: fdiv
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; CHECK-NEXT-NOT: fdiv
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; CHECK: fmul
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; CHECK: fmul
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; CHECK: fmul
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%div = fdiv <4 x float> %a, %D
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%div1 = fdiv <4 x float> %b, %D
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%div2 = fdiv <4 x float> %c, %D
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tail call void @foo_3_4xf(<4 x float> %div, <4 x float> %div1, <4 x float> %div2)
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ret void
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}
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define void @three_fdiv_2xdouble(<2 x double> %D, <2 x double> %a, <2 x double> %b, <2 x double> %c) #0 {
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; CHECK-LABEL: three_fdiv_2xdouble:
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; CHECK: fdiv
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; CHECK-NEXT-NOT: fdiv
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; CHECK: fmul
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; CHECK: fmul
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; CHECK: fmul
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%div = fdiv <2 x double> %a, %D
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%div1 = fdiv <2 x double> %b, %D
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%div2 = fdiv <2 x double> %c, %D
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tail call void @foo_3_2xd(<2 x double> %div, <2 x double> %div1, <2 x double> %div2)
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ret void
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}
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; Following test cases check we never combine two FDIVs if neither of them
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; calculates a reciprocal.
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define void @two_fdiv_float(float %D, float %a, float %b) #0 {
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; CHECK-LABEL: two_fdiv_float:
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; CHECK: fdiv
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; CHECK: fdiv
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; CHECK-NEXT-NOT: fmul
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%div = fdiv float %a, %D
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%div1 = fdiv float %b, %D
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tail call void @foo_2f(float %div, float %div1)
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ret void
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}
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define void @two_fdiv_double(double %D, double %a, double %b) #0 {
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; CHECK-LABEL: two_fdiv_double:
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; CHECK: fdiv
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; CHECK: fdiv
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; CHECK-NEXT-NOT: fmul
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%div = fdiv double %a, %D
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%div1 = fdiv double %b, %D
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tail call void @foo_2d(double %div, double %div1)
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ret void
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}
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declare void @foo_3f(float, float, float)
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declare void @foo_3d(double, double, double)
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declare void @foo_3_4xf(<4 x float>, <4 x float>, <4 x float>)
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declare void @foo_3_2xd(<2 x double>, <2 x double>, <2 x double>)
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declare void @foo_2f(float, float)
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declare void @foo_2d(double, double)
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attributes #0 = { "unsafe-fp-math"="true" }
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