1 ; RUN: opt < %s -instsimplify -S | FileCheck %s 2 3 declare {i8, i1} @llvm.uadd.with.overflow.i8(i8 %a, i8 %b) 4 declare {i8, i1} @llvm.usub.with.overflow.i8(i8 %a, i8 %b) 5 declare {i8, i1} @llvm.ssub.with.overflow.i8(i8 %a, i8 %b) 6 declare {i8, i1} @llvm.umul.with.overflow.i8(i8 %a, i8 %b) 7 8 define i1 @test_uadd1() { 9 ; CHECK-LABEL: @test_uadd1( 10 %x = call {i8, i1} @llvm.uadd.with.overflow.i8(i8 254, i8 3) 11 %overflow = extractvalue {i8, i1} %x, 1 12 ret i1 %overflow 13 ; CHECK-NEXT: ret i1 true 14 } 15 16 define i8 @test_uadd2() { 17 ; CHECK-LABEL: @test_uadd2( 18 %x = call {i8, i1} @llvm.uadd.with.overflow.i8(i8 254, i8 44) 19 %result = extractvalue {i8, i1} %x, 0 20 ret i8 %result 21 ; CHECK-NEXT: ret i8 42 22 } 23 24 define {i8, i1} @test_usub1(i8 %V) { 25 ; CHECK-LABEL: @test_usub1( 26 %x = call {i8, i1} @llvm.usub.with.overflow.i8(i8 %V, i8 %V) 27 ret {i8, i1} %x 28 ; CHECK-NEXT: ret { i8, i1 } zeroinitializer 29 } 30 31 define {i8, i1} @test_ssub1(i8 %V) { 32 ; CHECK-LABEL: @test_ssub1( 33 %x = call {i8, i1} @llvm.ssub.with.overflow.i8(i8 %V, i8 %V) 34 ret {i8, i1} %x 35 ; CHECK-NEXT: ret { i8, i1 } zeroinitializer 36 } 37 38 define {i8, i1} @test_umul1(i8 %V) { 39 ; CHECK-LABEL: @test_umul1( 40 %x = call {i8, i1} @llvm.umul.with.overflow.i8(i8 %V, i8 0) 41 ret {i8, i1} %x 42 ; CHECK-NEXT: ret { i8, i1 } zeroinitializer 43 } 44 45 declare i256 @llvm.cttz.i256(i256 %src, i1 %is_zero_undef) 46 47 define i256 @test_cttz() { 48 ; CHECK-LABEL: @test_cttz( 49 %x = call i256 @llvm.cttz.i256(i256 10, i1 false) 50 ret i256 %x 51 ; CHECK-NEXT: ret i256 1 52 } 53 54 declare i256 @llvm.ctpop.i256(i256 %src) 55 56 define i256 @test_ctpop() { 57 ; CHECK-LABEL: @test_ctpop( 58 %x = call i256 @llvm.ctpop.i256(i256 10) 59 ret i256 %x 60 ; CHECK-NEXT: ret i256 2 61 } 62 63 ; Test a non-intrinsic that we know about as a library call. 64 declare float @fabs(float %x) 65 66 define float @test_fabs_libcall() { 67 ; CHECK-LABEL: @test_fabs_libcall( 68 69 %x = call float @fabs(float -42.0) 70 ; This is still a real function call, so instsimplify won't nuke it -- other 71 ; passes have to do that. 72 ; CHECK-NEXT: call float @fabs 73 74 ret float %x 75 ; CHECK-NEXT: ret float 4.2{{0+}}e+01 76 } 77 78 79 declare float @llvm.fabs.f32(float) nounwind readnone 80 declare float @llvm.floor.f32(float) nounwind readnone 81 declare float @llvm.ceil.f32(float) nounwind readnone 82 declare float @llvm.trunc.f32(float) nounwind readnone 83 declare float @llvm.rint.f32(float) nounwind readnone 84 declare float @llvm.nearbyint.f32(float) nounwind readnone 85 86 ; Test idempotent intrinsics 87 define float @test_idempotence(float %a) { 88 ; CHECK-LABEL: @test_idempotence( 89 90 ; CHECK: fabs 91 ; CHECK-NOT: fabs 92 %a0 = call float @llvm.fabs.f32(float %a) 93 %a1 = call float @llvm.fabs.f32(float %a0) 94 95 ; CHECK: floor 96 ; CHECK-NOT: floor 97 %b0 = call float @llvm.floor.f32(float %a) 98 %b1 = call float @llvm.floor.f32(float %b0) 99 100 ; CHECK: ceil 101 ; CHECK-NOT: ceil 102 %c0 = call float @llvm.ceil.f32(float %a) 103 %c1 = call float @llvm.ceil.f32(float %c0) 104 105 ; CHECK: trunc 106 ; CHECK-NOT: trunc 107 %d0 = call float @llvm.trunc.f32(float %a) 108 %d1 = call float @llvm.trunc.f32(float %d0) 109 110 ; CHECK: rint 111 ; CHECK-NOT: rint 112 %e0 = call float @llvm.rint.f32(float %a) 113 %e1 = call float @llvm.rint.f32(float %e0) 114 115 ; CHECK: nearbyint 116 ; CHECK-NOT: nearbyint 117 %f0 = call float @llvm.nearbyint.f32(float %a) 118 %f1 = call float @llvm.nearbyint.f32(float %f0) 119 120 %r0 = fadd float %a1, %b1 121 %r1 = fadd float %r0, %c1 122 %r2 = fadd float %r1, %d1 123 %r3 = fadd float %r2, %e1 124 %r4 = fadd float %r3, %f1 125 126 ret float %r4 127 } 128 129 define i8* @operator_new() { 130 entry: 131 %call = tail call noalias i8* @_Znwm(i64 8) 132 %cmp = icmp eq i8* %call, null 133 br i1 %cmp, label %cast.end, label %cast.notnull 134 135 cast.notnull: ; preds = %entry 136 %add.ptr = getelementptr inbounds i8, i8* %call, i64 4 137 br label %cast.end 138 139 cast.end: ; preds = %cast.notnull, %entry 140 %cast.result = phi i8* [ %add.ptr, %cast.notnull ], [ null, %entry ] 141 ret i8* %cast.result 142 143 ; CHECK-LABEL: @operator_new 144 ; CHECK: br i1 false, label %cast.end, label %cast.notnull 145 } 146 147 declare noalias i8* @_Znwm(i64) 148 149 %"struct.std::nothrow_t" = type { i8 } 150 @_ZSt7nothrow = external global %"struct.std::nothrow_t" 151 152 define i8* @operator_new_nothrow_t() { 153 entry: 154 %call = tail call noalias i8* @_ZnamRKSt9nothrow_t(i64 8, %"struct.std::nothrow_t"* @_ZSt7nothrow) 155 %cmp = icmp eq i8* %call, null 156 br i1 %cmp, label %cast.end, label %cast.notnull 157 158 cast.notnull: ; preds = %entry 159 %add.ptr = getelementptr inbounds i8, i8* %call, i64 4 160 br label %cast.end 161 162 cast.end: ; preds = %cast.notnull, %entry 163 %cast.result = phi i8* [ %add.ptr, %cast.notnull ], [ null, %entry ] 164 ret i8* %cast.result 165 166 ; CHECK-LABEL: @operator_new_nothrow_t 167 ; CHECK: br i1 %cmp, label %cast.end, label %cast.notnull 168 } 169 170 declare i8* @_ZnamRKSt9nothrow_t(i64, %"struct.std::nothrow_t"*) nounwind 171 172 define i8* @malloc_can_return_null() { 173 entry: 174 %call = tail call noalias i8* @malloc(i64 8) 175 %cmp = icmp eq i8* %call, null 176 br i1 %cmp, label %cast.end, label %cast.notnull 177 178 cast.notnull: ; preds = %entry 179 %add.ptr = getelementptr inbounds i8, i8* %call, i64 4 180 br label %cast.end 181 182 cast.end: ; preds = %cast.notnull, %entry 183 %cast.result = phi i8* [ %add.ptr, %cast.notnull ], [ null, %entry ] 184 ret i8* %cast.result 185 186 ; CHECK-LABEL: @malloc_can_return_null 187 ; CHECK: br i1 %cmp, label %cast.end, label %cast.notnull 188 } 189 190 declare noalias i8* @malloc(i64) 191
