1 ; RUN: opt < %s -instsimplify -S | FileCheck %s
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)
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
13 ; CHECK-NEXT: ret i1 true
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
21 ; CHECK-NEXT: ret i8 42
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)
28 ; CHECK-NEXT: ret { i8, i1 } zeroinitializer
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)
35 ; CHECK-NEXT: ret { i8, i1 } zeroinitializer
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)
42 ; CHECK-NEXT: ret { i8, i1 } zeroinitializer
45 declare i256 @llvm.cttz.i256(i256 %src, i1 %is_zero_undef)
47 define i256 @test_cttz() {
48 ; CHECK-LABEL: @test_cttz(
49 %x = call i256 @llvm.cttz.i256(i256 10, i1 false)
51 ; CHECK-NEXT: ret i256 1
54 declare i256 @llvm.ctpop.i256(i256 %src)
56 define i256 @test_ctpop() {
57 ; CHECK-LABEL: @test_ctpop(
58 %x = call i256 @llvm.ctpop.i256(i256 10)
60 ; CHECK-NEXT: ret i256 2
63 ; Test a non-intrinsic that we know about as a library call.
64 declare float @fabs(float %x)
66 define float @test_fabs_libcall() {
67 ; CHECK-LABEL: @test_fabs_libcall(
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
75 ; CHECK-NEXT: ret float 4.2{{0+}}e+01
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
86 ; Test idempotent intrinsics
87 define float @test_idempotence(float %a) {
88 ; CHECK-LABEL: @test_idempotence(
92 %a0 = call float @llvm.fabs.f32(float %a)
93 %a1 = call float @llvm.fabs.f32(float %a0)
97 %b0 = call float @llvm.floor.f32(float %a)
98 %b1 = call float @llvm.floor.f32(float %b0)
102 %c0 = call float @llvm.ceil.f32(float %a)
103 %c1 = call float @llvm.ceil.f32(float %c0)
107 %d0 = call float @llvm.trunc.f32(float %a)
108 %d1 = call float @llvm.trunc.f32(float %d0)
112 %e0 = call float @llvm.rint.f32(float %a)
113 %e1 = call float @llvm.rint.f32(float %e0)
116 ; CHECK-NOT: nearbyint
117 %f0 = call float @llvm.nearbyint.f32(float %a)
118 %f1 = call float @llvm.nearbyint.f32(float %f0)
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
129 define i8* @operator_new() {
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
135 cast.notnull: ; preds = %entry
136 %add.ptr = getelementptr inbounds i8, i8* %call, i64 4
139 cast.end: ; preds = %cast.notnull, %entry
140 %cast.result = phi i8* [ %add.ptr, %cast.notnull ], [ null, %entry ]
143 ; CHECK-LABEL: @operator_new
144 ; CHECK: br i1 false, label %cast.end, label %cast.notnull
147 declare noalias i8* @_Znwm(i64)
149 %"struct.std::nothrow_t" = type { i8 }
150 @_ZSt7nothrow = external global %"struct.std::nothrow_t"
152 define i8* @operator_new_nothrow_t() {
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
158 cast.notnull: ; preds = %entry
159 %add.ptr = getelementptr inbounds i8, i8* %call, i64 4
162 cast.end: ; preds = %cast.notnull, %entry
163 %cast.result = phi i8* [ %add.ptr, %cast.notnull ], [ null, %entry ]
166 ; CHECK-LABEL: @operator_new_nothrow_t
167 ; CHECK: br i1 %cmp, label %cast.end, label %cast.notnull
170 declare i8* @_ZnamRKSt9nothrow_t(i64, %"struct.std::nothrow_t"*) nounwind
172 define i8* @malloc_can_return_null() {
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
178 cast.notnull: ; preds = %entry
179 %add.ptr = getelementptr inbounds i8, i8* %call, i64 4
182 cast.end: ; preds = %cast.notnull, %entry
183 %cast.result = phi i8* [ %add.ptr, %cast.notnull ], [ null, %entry ]
186 ; CHECK-LABEL: @malloc_can_return_null
187 ; CHECK: br i1 %cmp, label %cast.end, label %cast.notnull
190 declare noalias i8* @malloc(i64)