maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/ARM/pow.75.ll

71 lines
5.5 KiB
LLVM
Raw Normal View History

[DAGCombine] Optimize pow(X, 0.75) to sqrt(X) * sqrt(sqrt(X)) The sqrt case is faster and we already do this for the case where the exponent is 0.25. This adds the 0.75 case which is also not sensitive to signed zeros. Patch by Whitney Tsang (Whitney) Differential revision: https://reviews.llvm.org/D57434 llvm-svn: 353557
2019-02-09 03:50:58 +08:00
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=thumbv8-linux-gnueabihf -mattr=neon -debug 2>&1 | FileCheck %s
; REQUIRES: asserts
declare float @llvm.pow.f32(float, float)
declare <4 x float> @llvm.pow.v4f32(<4 x float>, <4 x float>)
declare double @llvm.pow.f64(double, double)
declare <2 x double> @llvm.pow.v2f64(<2 x double>, <2 x double>)
define float @pow_f32_three_fourth_fmf(float %x) nounwind {
; CHECK: Combining: {{.*}}: f32 = fpow ninf nsz afn [[X:t[0-9]+]], ConstantFP:f32<7.500000e-01>
; CHECK-NEXT: Creating new node: [[SQRT:t[0-9]+]]: f32 = fsqrt ninf nsz afn [[X]]
; CHECK-NEXT: Creating new node: [[SQRTSQRT:t[0-9]+]]: f32 = fsqrt ninf nsz afn [[SQRT]]
; CHECK-NEXT: Creating new node: [[R:t[0-9]+]]: f32 = fmul ninf nsz afn [[SQRT]], [[SQRTSQRT]]
; CHECK-NEXT: ... into: [[R]]: f32 = fmul ninf nsz afn [[SQRT]], [[SQRTSQRT]]
%r = call nsz ninf afn float @llvm.pow.f32(float %x, float 7.5e-01)
ret float %r
}
define double @pow_f64_three_fourth_fmf(double %x) nounwind {
; CHECK: Combining: {{.*}}: f64 = fpow ninf nsz afn t2, ConstantFP:f64<7.500000e-01>
; CHECK-NEXT: Creating new node: [[SQRT:t[0-9]+]]: f64 = fsqrt ninf nsz afn [[X]]
; CHECK-NEXT: Creating new node: [[SQRTSQRT:t[0-9]+]]: f64 = fsqrt ninf nsz afn [[SQRT]]
; CHECK-NEXT: Creating new node: [[R:t[0-9]+]]: f64 = fmul ninf nsz afn [[SQRT]], [[SQRTSQRT]]
; CHECK-NEXT: ... into: [[R]]: f64 = fmul ninf nsz afn [[SQRT]], [[SQRTSQRT]]
%r = call nsz ninf afn double @llvm.pow.f64(double %x, double 7.5e-01)
ret double %r
}
define <4 x float> @pow_v4f32_three_fourth_fmf(<4 x float> %x) nounwind {
; CHECK: Combining: {{.*}}: v4f32 = BUILD_VECTOR [[FORTH:t[0-9]+]], [[THIRD:t[0-9]+]], [[SECOND:t[0-9]+]], [[FIRST:t[0-9]+]]
; CHECK: Combining: [[FIRST]]: f32 = fpow nnan ninf nsz arcp contract afn reassoc [[X:t[0-9]+]], ConstantFP:f32<7.500000e-01>
; CHECK-NEXT: Creating new node: [[SQRT:t[0-9]+]]: f32 = fsqrt nnan ninf nsz arcp contract afn reassoc [[X]]
; CHECK-NEXT: Creating new node: [[SQRTSQRT:t[0-9]+]]: f32 = fsqrt nnan ninf nsz arcp contract afn reassoc [[SQRT]]
; CHECK-NEXT: Creating new node: [[R:t[0-9]+]]: f32 = fmul nnan ninf nsz arcp contract afn reassoc [[SQRT]], [[SQRTSQRT]]
; CHECK-NEXT: ... into: [[R]]: f32 = fmul nnan ninf nsz arcp contract afn reassoc [[SQRT]], [[SQRTSQRT]]
; CHECK: Combining: [[SECOND]]: f32 = fpow nnan ninf nsz arcp contract afn reassoc [[X:t[0-9]+]], ConstantFP:f32<7.500000e-01>
; CHECK-NEXT: Creating new node: [[SQRT:t[0-9]+]]: f32 = fsqrt nnan ninf nsz arcp contract afn reassoc [[X]]
; CHECK-NEXT: Creating new node: [[SQRTSQRT:t[0-9]+]]: f32 = fsqrt nnan ninf nsz arcp contract afn reassoc [[SQRT]]
; CHECK-NEXT: Creating new node: [[R:t[0-9]+]]: f32 = fmul nnan ninf nsz arcp contract afn reassoc [[SQRT]], [[SQRTSQRT]]
; CHECK-NEXT: ... into: [[R]]: f32 = fmul nnan ninf nsz arcp contract afn reassoc [[SQRT]], [[SQRTSQRT]]
; CHECK: Combining: [[THIRD]]: f32 = fpow nnan ninf nsz arcp contract afn reassoc [[X:t[0-9]+]], ConstantFP:f32<7.500000e-01>
; CHECK-NEXT: Creating new node: [[SQRT:t[0-9]+]]: f32 = fsqrt nnan ninf nsz arcp contract afn reassoc [[X]]
; CHECK-NEXT: Creating new node: [[SQRTSQRT:t[0-9]+]]: f32 = fsqrt nnan ninf nsz arcp contract afn reassoc [[SQRT]]
; CHECK-NEXT: Creating new node: [[R:t[0-9]+]]: f32 = fmul nnan ninf nsz arcp contract afn reassoc [[SQRT]], [[SQRTSQRT]]
; CHECK-NEXT: ... into: [[R]]: f32 = fmul nnan ninf nsz arcp contract afn reassoc [[SQRT]], [[SQRTSQRT]]
; CHECK: Combining: [[FORTH]]: f32 = fpow nnan ninf nsz arcp contract afn reassoc [[X:t[0-9]+]], ConstantFP:f32<7.500000e-01>
; CHECK-NEXT: Creating new node: [[SQRT:t[0-9]+]]: f32 = fsqrt nnan ninf nsz arcp contract afn reassoc [[X]]
; CHECK-NEXT: Creating new node: [[SQRTSQRT:t[0-9]+]]: f32 = fsqrt nnan ninf nsz arcp contract afn reassoc [[SQRT]]
; CHECK-NEXT: Creating new node: [[R:t[0-9]+]]: f32 = fmul nnan ninf nsz arcp contract afn reassoc [[SQRT]], [[SQRTSQRT]]
; CHECK-NEXT: ... into: [[R]]: f32 = fmul nnan ninf nsz arcp contract afn reassoc [[SQRT]], [[SQRTSQRT]]
%r = call fast <4 x float> @llvm.pow.v4f32(<4 x float> %x, <4 x float> <float 7.5e-1, float 7.5e-1, float 7.5e-01, float 7.5e-01>)
ret <4 x float> %r
}
define <2 x double> @pow_v2f64_three_fourth_fmf(<2 x double> %x) nounwind {
; CHECK: Combining: {{.*}}: v2f64 = BUILD_VECTOR [[SECOND:t[0-9]+]], [[FIRST:t[0-9]+]]
; CHECK: Combining: [[FIRST]]: f64 = fpow nnan ninf nsz arcp contract afn reassoc [[X:t[0-9]+]], ConstantFP:f64<7.500000e-01>
; CHECK-NEXT: Creating new node: [[SQRT:t[0-9]+]]: f64 = fsqrt nnan ninf nsz arcp contract afn reassoc [[X]]
; CHECK-NEXT: Creating new node: [[SQRTSQRT:t[0-9]+]]: f64 = fsqrt nnan ninf nsz arcp contract afn reassoc [[SQRT]]
; CHECK-NEXT: Creating new node: [[R:t[0-9]+]]: f64 = fmul nnan ninf nsz arcp contract afn reassoc [[SQRT]], [[SQRTSQRT]]
; CHECK-NEXT: ... into: [[R]]: f64 = fmul nnan ninf nsz arcp contract afn reassoc t16, t17
; CHECK: Combining: [[SECOND]]: f64 = fpow nnan ninf nsz arcp contract afn reassoc [[X:t[0-9]+]], ConstantFP:f64<7.500000e-01>
; CHECK-NEXT: Creating new node: [[SQRT:t[0-9]+]]: f64 = fsqrt nnan ninf nsz arcp contract afn reassoc [[X]]
; CHECK-NEXT: Creating new node: [[SQRTSQRT:t[0-9]+]]: f64 = fsqrt nnan ninf nsz arcp contract afn reassoc [[SQRT]]
; CHECK-NEXT: Creating new node: [[R:t[0-9]+]]: f64 = fmul nnan ninf nsz arcp contract afn reassoc [[SQRT]], [[SQRTSQRT]]
; CHECK-NEXT: ... into: [[R]]: f64 = fmul nnan ninf nsz arcp contract afn reassoc t19, t20
%r = call fast <2 x double> @llvm.pow.v2f64(<2 x double> %x, <2 x double> <double 7.5e-1, double 7.5e-1>)
ret <2 x double> %r
}