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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=instcombine -S | FileCheck %s3 4declare void @use(i1)5declare void @usef64(double)6 7; X == 42.0 ? X : 42.0 --> 42.08 9define double @oeq(double %x) {10; CHECK-LABEL: @oeq(11; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq double [[X:%.*]], 4.200000e+0112; CHECK-NEXT: call void @use(i1 [[CMP]])13; CHECK-NEXT: ret double 4.200000e+0114;15 %cmp = fcmp oeq double %x, 42.016 call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization17 %cond = select i1 %cmp, double %x, double 42.018 ret double %cond19}20 21; X == 42.0 ? 42.0 : X --> X22 23define float @oeq_swapped(float %x) {24; CHECK-LABEL: @oeq_swapped(25; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq float [[X:%.*]], 4.200000e+0126; CHECK-NEXT: call void @use(i1 [[CMP]])27; CHECK-NEXT: ret float [[X]]28;29 %cmp = fcmp oeq float %x, 42.030 call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization31 %cond = select i1 %cmp, float 42.0, float %x32 ret float %cond33}34 35; x != y ? x : y -> x if it's the right kind of != and at least36; one of x and y is not negative zero.37 38; X != 42.0 ? X : 42.0 --> X39 40define double @une(double %x) {41; CHECK-LABEL: @une(42; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], 4.200000e+0143; CHECK-NEXT: call void @use(i1 [[CMP]])44; CHECK-NEXT: ret double [[X]]45;46 %cmp = fcmp une double %x, 42.047 call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization48 %cond = select i1 %cmp, double %x, double 42.049 ret double %cond50}51 52; X != 42.0 ? 42.0 : X --> 42.053 54define double @une_swapped(double %x) {55; CHECK-LABEL: @une_swapped(56; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], 4.200000e+0157; CHECK-NEXT: call void @use(i1 [[CMP]])58; CHECK-NEXT: ret double 4.200000e+0159;60 %cmp = fcmp une double %x, 42.061 call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization62 %cond = select i1 %cmp, double 42.0, double %x63 ret double %cond64}65 66define double @une_could_be_negzero(double %x, double %y) {67; CHECK-LABEL: @une_could_be_negzero(68; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], [[Y:%.*]]69; CHECK-NEXT: call void @use(i1 [[CMP]])70; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[X]], double [[Y]]71; CHECK-NEXT: ret double [[COND]]72;73 %cmp = fcmp une double %x, %y74 call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization75 %cond = select i1 %cmp, double %x, double %y76 ret double %cond77}78 79define double @une_swapped_could_be_negzero(double %x, double %y) {80; CHECK-LABEL: @une_swapped_could_be_negzero(81; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], [[Y:%.*]]82; CHECK-NEXT: call void @use(i1 [[CMP]])83; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[Y]], double [[X]]84; CHECK-NEXT: ret double [[COND]]85;86 %cmp = fcmp une double %x, %y87 call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization88 %cond = select i1 %cmp, double %y, double %x89 ret double %cond90}91 92define double @one(double %x) {93; CHECK-LABEL: @one(94; CHECK-NEXT: [[CMP:%.*]] = fcmp one double [[X:%.*]], -1.000000e+0095; CHECK-NEXT: call void @use(i1 [[CMP]])96; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[X]], double -1.000000e+0097; CHECK-NEXT: ret double [[COND]]98;99 %cmp = fcmp one double %x, -1.0100 call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization101 %cond = select i1 %cmp, double %x, double -1.0102 ret double %cond103}104 105define double @one_swapped(double %x) {106; CHECK-LABEL: @one_swapped(107; CHECK-NEXT: [[CMP:%.*]] = fcmp one double [[X:%.*]], -1.000000e+00108; CHECK-NEXT: call void @use(i1 [[CMP]])109; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double -1.000000e+00, double [[X]]110; CHECK-NEXT: ret double [[COND]]111;112 %cmp = fcmp one double %x, -1.0113 call void @use(i1 %cmp) ; extra use to thwart predicate canonicalization114 %cond = select i1 %cmp, double -1.0, double %x115 ret double %cond116}117 118define i1 @fcmp_oeq_select(i1 %cond, float %a, float %b) {119; CHECK-LABEL: @fcmp_oeq_select(120; CHECK-NEXT: [[RES:%.*]] = fcmp oeq float [[A:%.*]], [[B:%.*]]121; CHECK-NEXT: ret i1 [[RES]]122;123 %lhs = select i1 %cond, float %a, float %b124 %rhs = select i1 %cond, float %b, float %a125 %res = fcmp oeq float %lhs, %rhs126 ret i1 %res127}128 129define i1 @fcmp_uno_select(i1 %cond, float %a, float %b) {130; CHECK-LABEL: @fcmp_uno_select(131; CHECK-NEXT: [[RES:%.*]] = fcmp uno float [[A:%.*]], [[B:%.*]]132; CHECK-NEXT: ret i1 [[RES]]133;134 %lhs = select i1 %cond, float %a, float %b135 %rhs = select i1 %cond, float %b, float %a136 %res = fcmp uno float %lhs, %rhs137 ret i1 %res138}139 140define i1 @fcmp_ogt_select(i1 %cond, float %a, float %b) {141; CHECK-LABEL: @fcmp_ogt_select(142; CHECK-NEXT: [[LHS:%.*]] = select i1 [[COND:%.*]], float [[A:%.*]], float [[B:%.*]]143; CHECK-NEXT: [[RHS:%.*]] = select i1 [[COND]], float [[B]], float [[A]]144; CHECK-NEXT: [[RES:%.*]] = fcmp ogt float [[LHS]], [[RHS]]145; CHECK-NEXT: ret i1 [[RES]]146;147 %lhs = select i1 %cond, float %a, float %b148 %rhs = select i1 %cond, float %b, float %a149 %res = fcmp ogt float %lhs, %rhs150 ret i1 %res151}152 153define i1 @test_fcmp_select_const_const(double %x) {154; CHECK-LABEL: @test_fcmp_select_const_const(155; CHECK-NEXT: [[CMP1:%.*]] = fcmp uno double [[X:%.*]], 0.000000e+00156; CHECK-NEXT: ret i1 [[CMP1]]157;158 %cmp1 = fcmp ord double %x, 0.000000e+00159 %sel = select i1 %cmp1, double 0xFFFFFFFFFFFFFFFF, double 0.000000e+00160 %cmp2 = fcmp oeq double %sel, 0.000000e+00161 ret i1 %cmp2162}163 164define i1 @test_fcmp_select_var_const(double %x, double %y) {165; CHECK-LABEL: @test_fcmp_select_var_const(166; CHECK-NEXT: [[CMP1:%.*]] = fcmp ule double [[X:%.*]], 0x3E80000000000000167; CHECK-NEXT: [[TMP1:%.*]] = fcmp olt double [[Y:%.*]], 0x3E80000000000000168; CHECK-NEXT: [[CMP2:%.*]] = select i1 [[CMP1]], i1 true, i1 [[TMP1]]169; CHECK-NEXT: ret i1 [[CMP2]]170;171 %cmp1 = fcmp ogt double %x, 0x3E80000000000000172 %sel = select i1 %cmp1, double %y, double 0.000000e+00173 %cmp2 = fcmp olt double %sel, 0x3E80000000000000174 ret i1 %cmp2175}176 177define i1 @test_fcmp_select_var_const_fmf(double %x, double %y) {178; CHECK-LABEL: @test_fcmp_select_var_const_fmf(179; CHECK-NEXT: [[CMP1:%.*]] = fcmp ule double [[X:%.*]], 0x3E80000000000000180; CHECK-NEXT: [[TMP1:%.*]] = fcmp nnan olt double [[Y:%.*]], 0x3E80000000000000181; CHECK-NEXT: [[CMP2:%.*]] = select i1 [[CMP1]], i1 true, i1 [[TMP1]]182; CHECK-NEXT: ret i1 [[CMP2]]183;184 %cmp1 = fcmp ogt double %x, 0x3E80000000000000185 %sel = select i1 %cmp1, double %y, double 0.000000e+00186 %cmp2 = fcmp nnan olt double %sel, 0x3E80000000000000187 ret i1 %cmp2188}189 190define <2 x i1> @test_fcmp_select_const_const_vec(<2 x double> %x) {191; CHECK-LABEL: @test_fcmp_select_const_const_vec(192; CHECK-NEXT: [[CMP1:%.*]] = fcmp uno <2 x double> [[X:%.*]], zeroinitializer193; CHECK-NEXT: ret <2 x i1> [[CMP1]]194;195 %cmp1 = fcmp ord <2 x double> %x, zeroinitializer196 %sel = select <2 x i1> %cmp1, <2 x double> <double 0xFFFFFFFFFFFFFFFF, double 0xFFFFFFFFFFFFFFFF>, <2 x double> zeroinitializer197 %cmp2 = fcmp oeq <2 x double> %sel, zeroinitializer198 ret <2 x i1> %cmp2199}200 201; Don't break clamp idioms202 203define double @test_fcmp_select_clamp(double %x) {204; CHECK-LABEL: @test_fcmp_select_clamp(205; CHECK-NEXT: [[CMP1:%.*]] = fcmp ogt double [[X:%.*]], 9.000000e-01206; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[CMP1]], double 9.000000e-01, double [[X]]207; CHECK-NEXT: [[CMP2:%.*]] = fcmp olt double [[SEL1]], 5.000000e-01208; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[CMP2]], double 5.000000e-01, double [[SEL1]]209; CHECK-NEXT: ret double [[SEL2]]210;211 %cmp1 = fcmp ogt double %x, 9.000000e-01212 %sel1 = select i1 %cmp1, double 9.000000e-01, double %x213 %cmp2 = fcmp olt double %sel1, 5.000000e-01214 %sel2 = select i1 %cmp2, double 5.000000e-01, double %sel1215 ret double %sel2216}217 218; Don't break fmin/fmax idioms219 220define double @test_fcmp_select_maxnum(double %x) {221; CHECK-LABEL: @test_fcmp_select_maxnum(222; CHECK-NEXT: [[SEL1:%.*]] = call nsz double @llvm.maxnum.f64(double [[X:%.*]], double 1.000000e+00)223; CHECK-NEXT: [[SEL2:%.*]] = call nsz double @llvm.minnum.f64(double [[SEL1]], double 2.550000e+02)224; CHECK-NEXT: ret double [[SEL2]]225;226 %cmp1 = fcmp ogt double %x, 1.0227 %sel1 = select nnan nsz i1 %cmp1, double %x, double 1.0228 %cmp2 = fcmp olt double %sel1, 255.0229 %sel2 = select nnan nsz i1 %cmp2, double %sel1, double 255.0230 ret double %sel2231}232 233define i1 @test_fcmp_select_const_const_multiuse(double %x) {234; CHECK-LABEL: @test_fcmp_select_const_const_multiuse(235; CHECK-NEXT: [[CMP1:%.*]] = fcmp ord double [[X:%.*]], 0.000000e+00236; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP1]], double 0xFFFFFFFFFFFFFFFF, double 0.000000e+00237; CHECK-NEXT: call void @usef64(double [[SEL]])238; CHECK-NEXT: [[CMP2:%.*]] = fcmp oeq double [[SEL]], 0.000000e+00239; CHECK-NEXT: ret i1 [[CMP2]]240;241 %cmp1 = fcmp ord double %x, 0.000000e+00242 %sel = select i1 %cmp1, double 0xFFFFFFFFFFFFFFFF, double 0.000000e+00243 call void @usef64(double %sel)244 %cmp2 = fcmp oeq double %sel, 0.000000e+00245 ret i1 %cmp2246}247 248define i1 @test_fcmp_select_const_const_unordered(double %x) {249; CHECK-LABEL: @test_fcmp_select_const_const_unordered(250; CHECK-NEXT: [[CMP1:%.*]] = fcmp ord double [[X:%.*]], 0.000000e+00251; CHECK-NEXT: ret i1 [[CMP1]]252;253 %cmp1 = fcmp uno double %x, 0.000000e+00254 %sel = select i1 %cmp1, double 0xFFFFFFFFFFFFFFFF, double 0.000000e+00255 %cmp2 = fcmp oeq double %sel, 0.000000e+00256 ret i1 %cmp2257}258 259define i1 @test_fcmp_select_var_const_unordered(double %x, double %y) {260; CHECK-LABEL: @test_fcmp_select_var_const_unordered(261; CHECK-NEXT: [[CMP1:%.*]] = fcmp ult double [[X:%.*]], 0x3E80000000000000262; CHECK-NEXT: [[TMP1:%.*]] = fcmp ugt double [[Y:%.*]], 0x3E80000000000000263; CHECK-NEXT: [[CMP2:%.*]] = select i1 [[CMP1]], i1 [[TMP1]], i1 false264; CHECK-NEXT: ret i1 [[CMP2]]265;266 %cmp1 = fcmp ult double %x, 0x3E80000000000000267 %sel = select i1 %cmp1, double %y, double 0.000000e+00268 %cmp2 = fcmp ugt double %sel, 0x3E80000000000000269 ret i1 %cmp2270}271 272define i1 @test_fcmp_ord_select_fcmp_oeq_var_const(double %x) {273; CHECK-LABEL: @test_fcmp_ord_select_fcmp_oeq_var_const(274; CHECK-NEXT: [[TMP1:%.*]] = fcmp oeq double [[X:%.*]], 1.000000e+00275; CHECK-NEXT: ret i1 [[TMP1]]276;277 %cmp1 = fcmp ord double %x, 0.000000e+00278 %sel = select i1 %cmp1, double %x, double 0.000000e+00279 %cmp2 = fcmp oeq double %sel, 1.000000e+00280 ret i1 %cmp2281}282 283; Make sure that we recognize the SPF correctly.284 285define float @test_select_nnan_nsz_fcmp_olt(float %x) {286; CHECK-LABEL: @test_select_nnan_nsz_fcmp_olt(287; CHECK-NEXT: [[TMP1:%.*]] = fcmp olt float [[X:%.*]], -0.000000e+00288; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[TMP1]], float [[X]], float -0.000000e+00289; CHECK-NEXT: ret float [[SEL1]]290;291 %cmp = fcmp olt float %x, 0.000000e+00292 %sel = select nnan nsz i1 %cmp, float %x, float -0.000000e+00293 ret float %sel294}295 296define float @test_select_nnan_nsz_fcmp_ult(float %x) {297; CHECK-LABEL: @test_select_nnan_nsz_fcmp_ult(298; CHECK-NEXT: [[DOTINV:%.*]] = fcmp oge float [[X:%.*]], 0.000000e+00299; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[DOTINV]], float -0.000000e+00, float [[X]]300; CHECK-NEXT: ret float [[SEL1]]301;302 %cmp = fcmp ult float %x, 0.000000e+00303 %sel = select nnan nsz i1 %cmp, float %x, float -0.000000e+00304 ret float %sel305}306