| ; Test that the pow library call simplifier works correctly. |
| ; |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| ; RUN: opt -instcombine -S < %s -mtriple=x86_64-apple-macosx10.9 | FileCheck %s --check-prefix=CHECK-EXP10 |
| ; RUN: opt -instcombine -S < %s -mtriple=arm-apple-ios7.0 | FileCheck %s --check-prefix=CHECK-EXP10 |
| ; RUN: opt -instcombine -S < %s -mtriple=x86_64-apple-macosx10.8 | FileCheck %s --check-prefix=CHECK-NO-EXP10 |
| ; RUN: opt -instcombine -S < %s -mtriple=arm-apple-ios6.0 | FileCheck %s --check-prefix=CHECK-NO-EXP10 |
| ; RUN: opt -instcombine -S < %s -mtriple=x86_64-netbsd | FileCheck %s --check-prefix=CHECK-NO-EXP10 |
| ; RUN: opt -instcombine -S < %s -mtriple=arm-apple-tvos9.0 | FileCheck %s --check-prefix=CHECK-EXP10 |
| ; RUN: opt -instcombine -S < %s -mtriple=arm-apple-watchos2.0 | FileCheck %s --check-prefix=CHECK-EXP10 |
| ; rdar://7251832 |
| |
| ; NOTE: The readonly attribute on the pow call should be preserved |
| ; in the cases below where pow is transformed into another function call. |
| |
| declare float @powf(float, float) nounwind readonly |
| declare double @pow(double, double) nounwind readonly |
| |
| ; Check pow(1.0, x) -> 1.0. |
| |
| define float @test_simplify1(float %x) { |
| ; CHECK-LABEL: @test_simplify1( |
| %retval = call float @powf(float 1.0, float %x) |
| ret float %retval |
| ; CHECK-NEXT: ret float 1.000000e+00 |
| } |
| |
| define double @test_simplify2(double %x) { |
| ; CHECK-LABEL: @test_simplify2( |
| %retval = call double @pow(double 1.0, double %x) |
| ret double %retval |
| ; CHECK-NEXT: ret double 1.000000e+00 |
| } |
| |
| ; Check pow(2.0, x) -> exp2(x). |
| |
| define float @test_simplify3(float %x) { |
| ; CHECK-LABEL: @test_simplify3( |
| %retval = call float @powf(float 2.0, float %x) |
| ; CHECK-NEXT: [[EXP2F:%[a-z0-9]+]] = call float @exp2f(float %x) [[NUW_RO:#[0-9]+]] |
| ret float %retval |
| ; CHECK-NEXT: ret float [[EXP2F]] |
| } |
| |
| define double @test_simplify4(double %x) { |
| ; CHECK-LABEL: @test_simplify4( |
| %retval = call double @pow(double 2.0, double %x) |
| ; CHECK-NEXT: [[EXP2:%[a-z0-9]+]] = call double @exp2(double %x) [[NUW_RO]] |
| ret double %retval |
| ; CHECK-NEXT: ret double [[EXP2]] |
| } |
| |
| ; Check pow(x, 0.0) -> 1.0. |
| |
| define float @test_simplify5(float %x) { |
| ; CHECK-LABEL: @test_simplify5( |
| %retval = call float @powf(float %x, float 0.0) |
| ret float %retval |
| ; CHECK-NEXT: ret float 1.000000e+00 |
| } |
| |
| define double @test_simplify6(double %x) { |
| ; CHECK-LABEL: @test_simplify6( |
| %retval = call double @pow(double %x, double 0.0) |
| ret double %retval |
| ; CHECK-NEXT: ret double 1.000000e+00 |
| } |
| |
| ; Check pow(x, 0.5) -> fabs(sqrt(x)), where x != -infinity. |
| |
| define float @test_simplify7(float %x) { |
| ; CHECK-LABEL: @test_simplify7( |
| %retval = call float @powf(float %x, float 0.5) |
| ; CHECK-NEXT: [[SQRTF:%[a-z0-9]+]] = call float @sqrtf(float %x) [[NUW_RO]] |
| ; CHECK-NEXT: [[FABSF:%[a-z0-9]+]] = call float @fabsf(float [[SQRTF]]) [[NUW_RO]] |
| ; CHECK-NEXT: [[FCMP:%[a-z0-9]+]] = fcmp oeq float %x, 0xFFF0000000000000 |
| ; CHECK-NEXT: [[SELECT:%[a-z0-9]+]] = select i1 [[FCMP]], float 0x7FF0000000000000, float [[FABSF]] |
| ret float %retval |
| ; CHECK-NEXT: ret float [[SELECT]] |
| } |
| |
| define double @test_simplify8(double %x) { |
| ; CHECK-LABEL: @test_simplify8( |
| %retval = call double @pow(double %x, double 0.5) |
| ; CHECK-NEXT: [[SQRT:%[a-z0-9]+]] = call double @sqrt(double %x) [[NUW_RO]] |
| ; CHECK-NEXT: [[FABS:%[a-z0-9]+]] = call double @fabs(double [[SQRT]]) [[NUW_RO]] |
| ; CHECK-NEXT: [[FCMP:%[a-z0-9]+]] = fcmp oeq double %x, 0xFFF0000000000000 |
| ; CHECK-NEXT: [[SELECT:%[a-z0-9]+]] = select i1 [[FCMP]], double 0x7FF0000000000000, double [[FABS]] |
| ret double %retval |
| ; CHECK-NEXT: ret double [[SELECT]] |
| } |
| |
| ; Check pow(-infinity, 0.5) -> +infinity. |
| |
| define float @test_simplify9(float %x) { |
| ; CHECK-LABEL: @test_simplify9( |
| %retval = call float @powf(float 0xFFF0000000000000, float 0.5) |
| ret float %retval |
| ; CHECK-NEXT: ret float 0x7FF0000000000000 |
| } |
| |
| define double @test_simplify10(double %x) { |
| ; CHECK-LABEL: @test_simplify10( |
| %retval = call double @pow(double 0xFFF0000000000000, double 0.5) |
| ret double %retval |
| ; CHECK-NEXT: ret double 0x7FF0000000000000 |
| } |
| |
| ; Check pow(x, 1.0) -> x. |
| |
| define float @test_simplify11(float %x) { |
| ; CHECK-LABEL: @test_simplify11( |
| %retval = call float @powf(float %x, float 1.0) |
| ret float %retval |
| ; CHECK-NEXT: ret float %x |
| } |
| |
| define double @test_simplify12(double %x) { |
| ; CHECK-LABEL: @test_simplify12( |
| %retval = call double @pow(double %x, double 1.0) |
| ret double %retval |
| ; CHECK-NEXT: ret double %x |
| } |
| |
| ; Check pow(x, 2.0) -> x*x. |
| |
| define float @test_simplify13(float %x) { |
| ; CHECK-LABEL: @test_simplify13( |
| %retval = call float @powf(float %x, float 2.0) |
| ; CHECK-NEXT: [[SQUARE:%[a-z0-9]+]] = fmul float %x, %x |
| ret float %retval |
| ; CHECK-NEXT: ret float [[SQUARE]] |
| } |
| |
| define double @test_simplify14(double %x) { |
| ; CHECK-LABEL: @test_simplify14( |
| %retval = call double @pow(double %x, double 2.0) |
| ; CHECK-NEXT: [[SQUARE:%[a-z0-9]+]] = fmul double %x, %x |
| ret double %retval |
| ; CHECK-NEXT: ret double [[SQUARE]] |
| } |
| |
| ; Check pow(x, -1.0) -> 1.0/x. |
| |
| define float @test_simplify15(float %x) { |
| ; CHECK-LABEL: @test_simplify15( |
| %retval = call float @powf(float %x, float -1.0) |
| ; CHECK-NEXT: [[RECIPROCAL:%[a-z0-9]+]] = fdiv float 1.000000e+00, %x |
| ret float %retval |
| ; CHECK-NEXT: ret float [[RECIPROCAL]] |
| } |
| |
| define double @test_simplify16(double %x) { |
| ; CHECK-LABEL: @test_simplify16( |
| %retval = call double @pow(double %x, double -1.0) |
| ; CHECK-NEXT: [[RECIPROCAL:%[a-z0-9]+]] = fdiv double 1.000000e+00, %x |
| ret double %retval |
| ; CHECK-NEXT: ret double [[RECIPROCAL]] |
| } |
| |
| declare double @llvm.pow.f64(double %Val, double %Power) |
| define double @test_simplify17(double %x) { |
| ; CHECK-LABEL: @test_simplify17( |
| %retval = call double @llvm.pow.f64(double %x, double 0.5) |
| ; CHECK-NEXT: [[SQRT:%[a-z0-9]+]] = call double @sqrt(double %x) |
| ; CHECK-NEXT: [[FABS:%[a-z0-9]+]] = call double @fabs(double [[SQRT]]) |
| ; CHECK-NEXT: [[FCMP:%[a-z0-9]+]] = fcmp oeq double %x, 0xFFF0000000000000 |
| ; CHECK-NEXT: [[SELECT:%[a-z0-9]+]] = select i1 [[FCMP]], double 0x7FF0000000000000, double [[FABS]] |
| ret double %retval |
| ; CHECK-NEXT: ret double [[SELECT]] |
| } |
| |
| ; Check pow(10.0, x) -> __exp10(x) on OS X 10.9+ and iOS 7.0+. |
| |
| define float @test_simplify18(float %x) { |
| ; CHECK-LABEL: @test_simplify18( |
| %retval = call float @powf(float 10.0, float %x) |
| ; CHECK-EXP10: [[EXP10F:%[_a-z0-9]+]] = call float @__exp10f(float %x) [[NUW_RO:#[0-9]+]] |
| ret float %retval |
| ; CHECK-EXP10: ret float [[EXP10F]] |
| ; CHECK-NO-EXP10: call float @powf |
| } |
| |
| define double @test_simplify19(double %x) { |
| ; CHECK-LABEL: @test_simplify19( |
| %retval = call double @pow(double 10.0, double %x) |
| ; CHECK-EXP10: [[EXP10:%[_a-z0-9]+]] = call double @__exp10(double %x) [[NUW_RO]] |
| ret double %retval |
| ; CHECK-EXP10: ret double [[EXP10]] |
| ; CHECK-NO-EXP10: call double @pow |
| } |
| |
| ; CHECK: attributes [[NUW_RO]] = { nounwind readonly } |
| |