1; RUN: llc -O3 -mtriple=x86_64-pc-linux < %s | FileCheck --check-prefix=COMMON --check-prefix=NO-FMA --check-prefix=FMACALL64 --check-prefix=FMACALL32 %s 2; RUN: llc -O3 -mtriple=x86_64-pc-linux -mattr=+fma < %s | FileCheck -check-prefix=COMMON --check-prefix=HAS-FMA --check-prefix=FMA64 --check-prefix=FMA32 %s 3 4; Verify that constants aren't folded to inexact results when the rounding mode 5; is unknown. 6; 7; double f1() { 8; // Because 0.1 cannot be represented exactly, this shouldn't be folded. 9; return 1.0/10.0; 10; } 11; 12; CHECK-LABEL: f1 13; COMMON: divsd 14define double @f1() { 15entry: 16 %div = call double @llvm.experimental.constrained.fdiv.f64( 17 double 1.000000e+00, 18 double 1.000000e+01, 19 metadata !"round.dynamic", 20 metadata !"fpexcept.strict") 21 ret double %div 22} 23 24; Verify that 'a - 0' isn't simplified to 'a' when the rounding mode is unknown. 25; 26; double f2(double a) { 27; // Because the result of '0 - 0' is negative zero if rounding mode is 28; // downward, this shouldn't be simplified. 29; return a - 0; 30; } 31; 32; CHECK-LABEL: f2 33; COMMON: subsd 34define double @f2(double %a) { 35entry: 36 %sub = call double @llvm.experimental.constrained.fsub.f64( 37 double %a, 38 double 0.000000e+00, 39 metadata !"round.dynamic", 40 metadata !"fpexcept.strict") 41 ret double %sub 42} 43 44; Verify that '-((-a)*b)' isn't simplified to 'a*b' when the rounding mode is 45; unknown. 46; 47; double f3(double a, double b) { 48; // Because the intermediate value involved in this calculation may require 49; // rounding, this shouldn't be simplified. 50; return -((-a)*b); 51; } 52; 53; CHECK-LABEL: f3: 54; COMMON: subsd 55; COMMON: mulsd 56; COMMON: subsd 57define double @f3(double %a, double %b) { 58entry: 59 %sub = call double @llvm.experimental.constrained.fsub.f64( 60 double -0.000000e+00, double %a, 61 metadata !"round.dynamic", 62 metadata !"fpexcept.strict") 63 %mul = call double @llvm.experimental.constrained.fmul.f64( 64 double %sub, double %b, 65 metadata !"round.dynamic", 66 metadata !"fpexcept.strict") 67 %ret = call double @llvm.experimental.constrained.fsub.f64( 68 double -0.000000e+00, 69 double %mul, 70 metadata !"round.dynamic", 71 metadata !"fpexcept.strict") 72 ret double %ret 73} 74 75; Verify that FP operations are not performed speculatively when FP exceptions 76; are not being ignored. 77; 78; double f4(int n, double a) { 79; // Because a + 1 may overflow, this should not be simplified. 80; if (n > 0) 81; return a + 1.0; 82; return a; 83; } 84; 85; 86; CHECK-LABEL: f4: 87; COMMON: testl 88; COMMON: jle 89; COMMON: addsd 90define double @f4(i32 %n, double %a) { 91entry: 92 %cmp = icmp sgt i32 %n, 0 93 br i1 %cmp, label %if.then, label %if.end 94 95if.then: 96 %add = call double @llvm.experimental.constrained.fadd.f64( 97 double 1.000000e+00, double %a, 98 metadata !"round.dynamic", 99 metadata !"fpexcept.strict") 100 br label %if.end 101 102if.end: 103 %a.0 = phi double [%add, %if.then], [ %a, %entry ] 104 ret double %a.0 105} 106 107; Verify that sqrt(42.0) isn't simplified when the rounding mode is unknown. 108; CHECK-LABEL: f5 109; COMMON: sqrtsd 110define double @f5() { 111entry: 112 %result = call double @llvm.experimental.constrained.sqrt.f64(double 42.0, 113 metadata !"round.dynamic", 114 metadata !"fpexcept.strict") 115 ret double %result 116} 117 118; Verify that pow(42.1, 3.0) isn't simplified when the rounding mode is unknown. 119; CHECK-LABEL: f6 120; COMMON: pow 121define double @f6() { 122entry: 123 %result = call double @llvm.experimental.constrained.pow.f64(double 42.1, 124 double 3.0, 125 metadata !"round.dynamic", 126 metadata !"fpexcept.strict") 127 ret double %result 128} 129 130; Verify that powi(42.1, 3) isn't simplified when the rounding mode is unknown. 131; CHECK-LABEL: f7 132; COMMON: powi 133define double @f7() { 134entry: 135 %result = call double @llvm.experimental.constrained.powi.f64(double 42.1, 136 i32 3, 137 metadata !"round.dynamic", 138 metadata !"fpexcept.strict") 139 ret double %result 140} 141 142; Verify that sin(42.0) isn't simplified when the rounding mode is unknown. 143; CHECK-LABEL: f8 144; COMMON: sin 145define double @f8() { 146entry: 147 %result = call double @llvm.experimental.constrained.sin.f64(double 42.0, 148 metadata !"round.dynamic", 149 metadata !"fpexcept.strict") 150 ret double %result 151} 152 153; Verify that cos(42.0) isn't simplified when the rounding mode is unknown. 154; CHECK-LABEL: f9 155; COMMON: cos 156define double @f9() { 157entry: 158 %result = call double @llvm.experimental.constrained.cos.f64(double 42.0, 159 metadata !"round.dynamic", 160 metadata !"fpexcept.strict") 161 ret double %result 162} 163 164; Verify that exp(42.0) isn't simplified when the rounding mode is unknown. 165; CHECK-LABEL: f10 166; COMMON: exp 167define double @f10() { 168entry: 169 %result = call double @llvm.experimental.constrained.exp.f64(double 42.0, 170 metadata !"round.dynamic", 171 metadata !"fpexcept.strict") 172 ret double %result 173} 174 175; Verify that exp2(42.1) isn't simplified when the rounding mode is unknown. 176; CHECK-LABEL: f11 177; COMMON: exp2 178define double @f11() { 179entry: 180 %result = call double @llvm.experimental.constrained.exp2.f64(double 42.1, 181 metadata !"round.dynamic", 182 metadata !"fpexcept.strict") 183 ret double %result 184} 185 186; Verify that log(42.0) isn't simplified when the rounding mode is unknown. 187; CHECK-LABEL: f12 188; COMMON: log 189define double @f12() { 190entry: 191 %result = call double @llvm.experimental.constrained.log.f64(double 42.0, 192 metadata !"round.dynamic", 193 metadata !"fpexcept.strict") 194 ret double %result 195} 196 197; Verify that log10(42.0) isn't simplified when the rounding mode is unknown. 198; CHECK-LABEL: f13 199; COMMON: log10 200define double @f13() { 201entry: 202 %result = call double @llvm.experimental.constrained.log10.f64(double 42.0, 203 metadata !"round.dynamic", 204 metadata !"fpexcept.strict") 205 ret double %result 206} 207 208; Verify that log2(42.0) isn't simplified when the rounding mode is unknown. 209; CHECK-LABEL: f14 210; COMMON: log2 211define double @f14() { 212entry: 213 %result = call double @llvm.experimental.constrained.log2.f64(double 42.0, 214 metadata !"round.dynamic", 215 metadata !"fpexcept.strict") 216 ret double %result 217} 218 219; Verify that rint(42.1) isn't simplified when the rounding mode is unknown. 220; CHECK-LABEL: f15 221; NO-FMA: rint 222; HAS-FMA: vroundsd 223define double @f15() { 224entry: 225 %result = call double @llvm.experimental.constrained.rint.f64(double 42.1, 226 metadata !"round.dynamic", 227 metadata !"fpexcept.strict") 228 ret double %result 229} 230 231; Verify that nearbyint(42.1) isn't simplified when the rounding mode is 232; unknown. 233; CHECK-LABEL: f16 234; NO-FMA: nearbyint 235; HAS-FMA: vroundsd 236define double @f16() { 237entry: 238 %result = call double @llvm.experimental.constrained.nearbyint.f64( 239 double 42.1, 240 metadata !"round.dynamic", 241 metadata !"fpexcept.strict") 242 ret double %result 243} 244 245; Verify that fma(3.5) isn't simplified when the rounding mode is 246; unknown. 247; CHECK-LABEL: f17 248; FMACALL32: jmp fmaf # TAILCALL 249; FMA32: vfmadd213ss 250define float @f17() { 251entry: 252 %result = call float @llvm.experimental.constrained.fma.f32( 253 float 3.5, 254 float 3.5, 255 float 3.5, 256 metadata !"round.dynamic", 257 metadata !"fpexcept.strict") 258 ret float %result 259} 260 261; Verify that fma(42.1) isn't simplified when the rounding mode is 262; unknown. 263; CHECK-LABEL: f18 264; FMACALL64: jmp fma # TAILCALL 265; FMA64: vfmadd213sd 266define double @f18() { 267entry: 268 %result = call double @llvm.experimental.constrained.fma.f64( 269 double 42.1, 270 double 42.1, 271 double 42.1, 272 metadata !"round.dynamic", 273 metadata !"fpexcept.strict") 274 ret double %result 275} 276 277@llvm.fp.env = thread_local global i8 zeroinitializer, section "llvm.metadata" 278declare double @llvm.experimental.constrained.fdiv.f64(double, double, metadata, metadata) 279declare double @llvm.experimental.constrained.fmul.f64(double, double, metadata, metadata) 280declare double @llvm.experimental.constrained.fadd.f64(double, double, metadata, metadata) 281declare double @llvm.experimental.constrained.fsub.f64(double, double, metadata, metadata) 282declare double @llvm.experimental.constrained.sqrt.f64(double, metadata, metadata) 283declare double @llvm.experimental.constrained.pow.f64(double, double, metadata, metadata) 284declare double @llvm.experimental.constrained.powi.f64(double, i32, metadata, metadata) 285declare double @llvm.experimental.constrained.sin.f64(double, metadata, metadata) 286declare double @llvm.experimental.constrained.cos.f64(double, metadata, metadata) 287declare double @llvm.experimental.constrained.exp.f64(double, metadata, metadata) 288declare double @llvm.experimental.constrained.exp2.f64(double, metadata, metadata) 289declare double @llvm.experimental.constrained.log.f64(double, metadata, metadata) 290declare double @llvm.experimental.constrained.log10.f64(double, metadata, metadata) 291declare double @llvm.experimental.constrained.log2.f64(double, metadata, metadata) 292declare double @llvm.experimental.constrained.rint.f64(double, metadata, metadata) 293declare double @llvm.experimental.constrained.nearbyint.f64(double, metadata, metadata) 294declare float @llvm.experimental.constrained.fma.f32(float, float, float, metadata, metadata) 295declare double @llvm.experimental.constrained.fma.f64(double, double, double, metadata, metadata) 296