1 ; Test that the pow library call simplifier works correctly. 2 ; 3 ; RUN: opt < %s -instcombine -S | FileCheck %s 4 ; RUN: opt -instcombine -S < %s -mtriple=x86_64-apple-macosx10.9 | FileCheck %s --check-prefix=CHECK-EXP10 5 ; RUN: opt -instcombine -S < %s -mtriple=arm-apple-ios7.0 | FileCheck %s --check-prefix=CHECK-EXP10 6 ; RUN: opt -instcombine -S < %s -mtriple=x86_64-apple-macosx10.8 | FileCheck %s --check-prefix=CHECK-NO-EXP10 7 ; RUN: opt -instcombine -S < %s -mtriple=arm-apple-ios6.0 | FileCheck %s --check-prefix=CHECK-NO-EXP10 8 ; RUN: opt -instcombine -S < %s -mtriple=x86_64-netbsd | FileCheck %s --check-prefix=CHECK-NO-EXP10 9 ; RUN: opt -instcombine -S < %s -mtriple=arm-apple-tvos9.0 | FileCheck %s --check-prefix=CHECK-EXP10 10 ; RUN: opt -instcombine -S < %s -mtriple=arm-apple-watchos2.0 | FileCheck %s --check-prefix=CHECK-EXP10 11 ; rdar://7251832 12 13 ; NOTE: The readonly attribute on the pow call should be preserved 14 ; in the cases below where pow is transformed into another function call. 15 16 declare float @powf(float, float) nounwind readonly 17 declare double @pow(double, double) nounwind readonly 18 19 ; Check pow(1.0, x) -> 1.0. 20 21 define float @test_simplify1(float %x) { 22 ; CHECK-LABEL: @test_simplify1( 23 %retval = call float @powf(float 1.0, float %x) 24 ret float %retval 25 ; CHECK-NEXT: ret float 1.000000e+00 26 } 27 28 define double @test_simplify2(double %x) { 29 ; CHECK-LABEL: @test_simplify2( 30 %retval = call double @pow(double 1.0, double %x) 31 ret double %retval 32 ; CHECK-NEXT: ret double 1.000000e+00 33 } 34 35 ; Check pow(2.0, x) -> exp2(x). 36 37 define float @test_simplify3(float %x) { 38 ; CHECK-LABEL: @test_simplify3( 39 %retval = call float @powf(float 2.0, float %x) 40 ; CHECK-NEXT: [[EXP2F:%[a-z0-9]+]] = call float @exp2f(float %x) [[NUW_RO:#[0-9]+]] 41 ret float %retval 42 ; CHECK-NEXT: ret float [[EXP2F]] 43 } 44 45 define double @test_simplify4(double %x) { 46 ; CHECK-LABEL: @test_simplify4( 47 %retval = call double @pow(double 2.0, double %x) 48 ; CHECK-NEXT: [[EXP2:%[a-z0-9]+]] = call double @exp2(double %x) [[NUW_RO]] 49 ret double %retval 50 ; CHECK-NEXT: ret double [[EXP2]] 51 } 52 53 ; Check pow(x, 0.0) -> 1.0. 54 55 define float @test_simplify5(float %x) { 56 ; CHECK-LABEL: @test_simplify5( 57 %retval = call float @powf(float %x, float 0.0) 58 ret float %retval 59 ; CHECK-NEXT: ret float 1.000000e+00 60 } 61 62 define double @test_simplify6(double %x) { 63 ; CHECK-LABEL: @test_simplify6( 64 %retval = call double @pow(double %x, double 0.0) 65 ret double %retval 66 ; CHECK-NEXT: ret double 1.000000e+00 67 } 68 69 ; Check pow(x, 0.5) -> fabs(sqrt(x)), where x != -infinity. 70 71 define float @test_simplify7(float %x) { 72 ; CHECK-LABEL: @test_simplify7( 73 %retval = call float @powf(float %x, float 0.5) 74 ; CHECK-NEXT: [[SQRTF:%[a-z0-9]+]] = call float @sqrtf(float %x) [[NUW_RO]] 75 ; CHECK-NEXT: [[FABSF:%[a-z0-9]+]] = call float @fabsf(float [[SQRTF]]) [[NUW_RO]] 76 ; CHECK-NEXT: [[FCMP:%[a-z0-9]+]] = fcmp oeq float %x, 0xFFF0000000000000 77 ; CHECK-NEXT: [[SELECT:%[a-z0-9]+]] = select i1 [[FCMP]], float 0x7FF0000000000000, float [[FABSF]] 78 ret float %retval 79 ; CHECK-NEXT: ret float [[SELECT]] 80 } 81 82 define double @test_simplify8(double %x) { 83 ; CHECK-LABEL: @test_simplify8( 84 %retval = call double @pow(double %x, double 0.5) 85 ; CHECK-NEXT: [[SQRT:%[a-z0-9]+]] = call double @sqrt(double %x) [[NUW_RO]] 86 ; CHECK-NEXT: [[FABS:%[a-z0-9]+]] = call double @fabs(double [[SQRT]]) [[NUW_RO]] 87 ; CHECK-NEXT: [[FCMP:%[a-z0-9]+]] = fcmp oeq double %x, 0xFFF0000000000000 88 ; CHECK-NEXT: [[SELECT:%[a-z0-9]+]] = select i1 [[FCMP]], double 0x7FF0000000000000, double [[FABS]] 89 ret double %retval 90 ; CHECK-NEXT: ret double [[SELECT]] 91 } 92 93 ; Check pow(-infinity, 0.5) -> +infinity. 94 95 define float @test_simplify9(float %x) { 96 ; CHECK-LABEL: @test_simplify9( 97 %retval = call float @powf(float 0xFFF0000000000000, float 0.5) 98 ret float %retval 99 ; CHECK-NEXT: ret float 0x7FF0000000000000 100 } 101 102 define double @test_simplify10(double %x) { 103 ; CHECK-LABEL: @test_simplify10( 104 %retval = call double @pow(double 0xFFF0000000000000, double 0.5) 105 ret double %retval 106 ; CHECK-NEXT: ret double 0x7FF0000000000000 107 } 108 109 ; Check pow(x, 1.0) -> x. 110 111 define float @test_simplify11(float %x) { 112 ; CHECK-LABEL: @test_simplify11( 113 %retval = call float @powf(float %x, float 1.0) 114 ret float %retval 115 ; CHECK-NEXT: ret float %x 116 } 117 118 define double @test_simplify12(double %x) { 119 ; CHECK-LABEL: @test_simplify12( 120 %retval = call double @pow(double %x, double 1.0) 121 ret double %retval 122 ; CHECK-NEXT: ret double %x 123 } 124 125 ; Check pow(x, 2.0) -> x*x. 126 127 define float @test_simplify13(float %x) { 128 ; CHECK-LABEL: @test_simplify13( 129 %retval = call float @powf(float %x, float 2.0) 130 ; CHECK-NEXT: [[SQUARE:%[a-z0-9]+]] = fmul float %x, %x 131 ret float %retval 132 ; CHECK-NEXT: ret float [[SQUARE]] 133 } 134 135 define double @test_simplify14(double %x) { 136 ; CHECK-LABEL: @test_simplify14( 137 %retval = call double @pow(double %x, double 2.0) 138 ; CHECK-NEXT: [[SQUARE:%[a-z0-9]+]] = fmul double %x, %x 139 ret double %retval 140 ; CHECK-NEXT: ret double [[SQUARE]] 141 } 142 143 ; Check pow(x, -1.0) -> 1.0/x. 144 145 define float @test_simplify15(float %x) { 146 ; CHECK-LABEL: @test_simplify15( 147 %retval = call float @powf(float %x, float -1.0) 148 ; CHECK-NEXT: [[RECIPROCAL:%[a-z0-9]+]] = fdiv float 1.000000e+00, %x 149 ret float %retval 150 ; CHECK-NEXT: ret float [[RECIPROCAL]] 151 } 152 153 define double @test_simplify16(double %x) { 154 ; CHECK-LABEL: @test_simplify16( 155 %retval = call double @pow(double %x, double -1.0) 156 ; CHECK-NEXT: [[RECIPROCAL:%[a-z0-9]+]] = fdiv double 1.000000e+00, %x 157 ret double %retval 158 ; CHECK-NEXT: ret double [[RECIPROCAL]] 159 } 160 161 declare double @llvm.pow.f64(double %Val, double %Power) 162 define double @test_simplify17(double %x) { 163 ; CHECK-LABEL: @test_simplify17( 164 %retval = call double @llvm.pow.f64(double %x, double 0.5) 165 ; CHECK-NEXT: [[SQRT:%[a-z0-9]+]] = call double @sqrt(double %x) 166 ; CHECK-NEXT: [[FABS:%[a-z0-9]+]] = call double @fabs(double [[SQRT]]) 167 ; CHECK-NEXT: [[FCMP:%[a-z0-9]+]] = fcmp oeq double %x, 0xFFF0000000000000 168 ; CHECK-NEXT: [[SELECT:%[a-z0-9]+]] = select i1 [[FCMP]], double 0x7FF0000000000000, double [[FABS]] 169 ret double %retval 170 ; CHECK-NEXT: ret double [[SELECT]] 171 } 172 173 ; Check pow(10.0, x) -> __exp10(x) on OS X 10.9+ and iOS 7.0+. 174 175 define float @test_simplify18(float %x) { 176 ; CHECK-LABEL: @test_simplify18( 177 %retval = call float @powf(float 10.0, float %x) 178 ; CHECK-EXP10: [[EXP10F:%[_a-z0-9]+]] = call float @__exp10f(float %x) [[NUW_RO:#[0-9]+]] 179 ret float %retval 180 ; CHECK-EXP10: ret float [[EXP10F]] 181 ; CHECK-NO-EXP10: call float @powf 182 } 183 184 define double @test_simplify19(double %x) { 185 ; CHECK-LABEL: @test_simplify19( 186 %retval = call double @pow(double 10.0, double %x) 187 ; CHECK-EXP10: [[EXP10:%[_a-z0-9]+]] = call double @__exp10(double %x) [[NUW_RO]] 188 ret double %retval 189 ; CHECK-EXP10: ret double [[EXP10]] 190 ; CHECK-NO-EXP10: call double @pow 191 } 192 193 ; CHECK: attributes [[NUW_RO]] = { nounwind readonly } 194 195
