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