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[SLC] Test simplification of pow(x, 0.333...) to cbrt(x) (NFC) 

Add test case for simplifying `pow(x, 0.333...)` into `cbrt(x)`, which
D49040 enables.

llvm-svn: 338152
This commit is contained in:
Evandro Menezes 2018-07-27 18:56:47 +00:00
parent 1a6d7ab55d
commit f611ce82c0
1 changed files with 117 additions and 0 deletions
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117
llvm/test/Transforms/InstCombine/pow-cbrt.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
define double @pow_intrinsic_third_fast(double %x) {
; CHECK-LABEL: @pow_intrinsic_third_fast(
; CHECK-NEXT: [[POW:%.*]] = call fast double @llvm.pow.f64(double [[X:%.*]], double 0x3FD5555555555555)
; CHECK-NEXT: ret double [[POW]]
;
%pow = call fast double @llvm.pow.f64(double %x, double 0x3fd5555555555555)
ret double %pow
}
define float @powf_intrinsic_third_fast(float %x) {
; CHECK-LABEL: @powf_intrinsic_third_fast(
; CHECK-NEXT: [[POW:%.*]] = call fast float @llvm.pow.f32(float [[X:%.*]], float 0x3FD5555560000000)
; CHECK-NEXT: ret float [[POW]]
;
%pow = call fast float @llvm.pow.f32(float %x, float 0x3fd5555560000000)
ret float %pow
}
define double @pow_intrinsic_third_approx(double %x) {
; CHECK-LABEL: @pow_intrinsic_third_approx(
; CHECK-NEXT: [[POW:%.*]] = call afn double @llvm.pow.f64(double [[X:%.*]], double 0x3FD5555555555555)
; CHECK-NEXT: ret double [[POW]]
;
%pow = call afn double @llvm.pow.f64(double %x, double 0x3fd5555555555555)
ret double %pow
}
define float @powf_intrinsic_third_approx(float %x) {
; CHECK-LABEL: @powf_intrinsic_third_approx(
; CHECK-NEXT: [[POW:%.*]] = call afn float @llvm.pow.f32(float [[X:%.*]], float 0x3FD5555560000000)
; CHECK-NEXT: ret float [[POW]]
;
%pow = call afn float @llvm.pow.f32(float %x, float 0x3fd5555560000000)
ret float %pow
}
define double @pow_libcall_third_fast(double %x) {
; CHECK-LABEL: @pow_libcall_third_fast(
; CHECK-NEXT: [[POW:%.*]] = call fast double @pow(double [[X:%.*]], double 0x3FD5555555555555)
; CHECK-NEXT: ret double [[POW]]
;
%pow = call fast double @pow(double %x, double 0x3fd5555555555555)
ret double %pow
}
define float @powf_libcall_third_fast(float %x) {
; CHECK-LABEL: @powf_libcall_third_fast(
; CHECK-NEXT: [[POW:%.*]] = call fast float @powf(float [[X:%.*]], float 0x3FD5555560000000)
; CHECK-NEXT: ret float [[POW]]
;
%pow = call fast float @powf(float %x, float 0x3fd5555560000000)
ret float %pow
}
define double @pow_intrinsic_negthird_fast(double %x) {
; CHECK-LABEL: @pow_intrinsic_negthird_fast(
; CHECK-NEXT: [[POW:%.*]] = call fast double @llvm.pow.f64(double [[X:%.*]], double 0xBFD5555555555555)
; CHECK-NEXT: ret double [[POW]]
;
%pow = call fast double @llvm.pow.f64(double %x, double 0xbfd5555555555555)
ret double %pow
}
define float @powf_intrinsic_negthird_fast(float %x) {
; CHECK-LABEL: @powf_intrinsic_negthird_fast(
; CHECK-NEXT: [[POW:%.*]] = call fast float @llvm.pow.f32(float [[X:%.*]], float 0xBFD5555560000000)
; CHECK-NEXT: ret float [[POW]]
;
%pow = call fast float @llvm.pow.f32(float %x, float 0xbfd5555560000000)
ret float %pow
}
define double @pow_intrinsic_negthird_approx(double %x) {
; CHECK-LABEL: @pow_intrinsic_negthird_approx(
; CHECK-NEXT: [[POW:%.*]] = call afn double @llvm.pow.f64(double [[X:%.*]], double 0xBFD5555555555555)
; CHECK-NEXT: ret double [[POW]]
;
%pow = call afn double @llvm.pow.f64(double %x, double 0xbfd5555555555555)
ret double %pow
}
define float @powf_intrinsic_negthird_approx(float %x) {
; CHECK-LABEL: @powf_intrinsic_negthird_approx(
; CHECK-NEXT: [[POW:%.*]] = call afn float @llvm.pow.f32(float [[X:%.*]], float 0xBFD5555560000000)
; CHECK-NEXT: ret float [[POW]]
;
%pow = call afn float @llvm.pow.f32(float %x, float 0xbfd5555560000000)
ret float %pow
}
define double @pow_libcall_negthird_fast(double %x) {
; CHECK-LABEL: @pow_libcall_negthird_fast(
; CHECK-NEXT: [[POW:%.*]] = call fast double @pow(double [[X:%.*]], double 0xBFD5555555555555)
; CHECK-NEXT: ret double [[POW]]
;
%pow = call fast double @pow(double %x, double 0xbfd5555555555555)
ret double %pow
}
define float @powf_libcall_negthird_fast(float %x) {
; CHECK-LABEL: @powf_libcall_negthird_fast(
; CHECK-NEXT: [[POW:%.*]] = call fast float @powf(float [[X:%.*]], float 0xBFD5555560000000)
; CHECK-NEXT: ret float [[POW]]
;
%pow = call fast float @powf(float %x, float 0xbfd5555560000000)
ret float %pow
}
declare double @llvm.pow.f64(double, double) #0
declare float @llvm.pow.f32(float, float) #0
declare double @pow(double, double)
declare float @powf(float, float)
attributes #0 = { nounwind readnone speculatable }