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1; RUN: opt -lower-constant-intrinsics -S < %s | FileCheck %s
2
3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
4target triple = "x86_64-apple-darwin10.0.0"
5
6declare i64 @llvm.objectsize.i64(i8*, i1, i1, i1) nounwind readonly
7declare i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)*, i1, i1, i1) nounwind readonly
8declare void @llvm.trap() nounwind
9
10; CHECK-LABEL: @test1(
11; objectsize should fold to a constant, which causes the branch to fold to an
12; uncond branch.
13define i32 @test1(i8* %ptr) nounwind ssp noredzone align 2 {
14entry:
15  %0 = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false, i1 false, i1 false)
16  %1 = icmp ugt i64 %0, 3
17  br i1 %1, label %T, label %trap
18
19; CHECK: entry:
20; CHECK-NOT: label %trap
21
22trap:                                             ; preds = %0, %entry
23  tail call void @llvm.trap() noreturn nounwind
24  unreachable
25
26T:
27; CHECK: ret i32 4
28  ret i32 4
29}
30
31; CHECK-LABEL: @test_objectsize_null_flag(
32define i64 @test_objectsize_null_flag(i8* %ptr) {
33entry:
34  ; CHECK: ret i64 -1
35  %0 = tail call i64 @llvm.objectsize.i64(i8* null, i1 false, i1 true, i1 false)
36  ret i64 %0
37}
38
39; CHECK-LABEL: @test_objectsize_null_flag_min(
40define i64 @test_objectsize_null_flag_min(i8* %ptr) {
41entry:
42  ; CHECK: ret i64 0
43  %0 = tail call i64 @llvm.objectsize.i64(i8* null, i1 true, i1 true, i1 false)
44  ret i64 %0
45}
46
47; Test foldable null pointers because we evaluate them with non-exact modes in
48; CodeGenPrepare.
49; CHECK-LABEL: @test_objectsize_null_flag_noas0(
50define i64 @test_objectsize_null_flag_noas0() {
51entry:
52  ; CHECK: ret i64 -1
53  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 false,
54                                               i1 true, i1 false)
55  ret i64 %0
56}
57
58; CHECK-LABEL: @test_objectsize_null_flag_min_noas0(
59define i64 @test_objectsize_null_flag_min_noas0() {
60entry:
61  ; CHECK: ret i64 0
62  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 true,
63                                               i1 true, i1 false)
64  ret i64 %0
65}
66
67; CHECK-LABEL: @test_objectsize_null_known_flag_noas0
68define i64 @test_objectsize_null_known_flag_noas0() {
69entry:
70  ; CHECK: ret i64 -1
71  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 false,
72                                               i1 false, i1 false)
73  ret i64 %0
74}
75
76; CHECK-LABEL: @test_objectsize_null_known_flag_min_noas0
77define i64 @test_objectsize_null_known_flag_min_noas0() {
78entry:
79  ; CHECK: ret i64 0
80  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 true,
81                                               i1 false, i1 false)
82  ret i64 %0
83}
84
85; CHECK-LABEL: @test_objectsize_byval_arg(
86; CHECK: ret i64 42
87define i64 @test_objectsize_byval_arg([42 x i8]* byval([42 x i8]) %ptr) {
88  %cast = bitcast [42 x i8]* %ptr to i8*
89  %size = tail call i64 @llvm.objectsize.i64(i8* %cast, i1 true, i1 false, i1 false)
90  ret i64 %size
91}
92
93; CHECK-LABEL: @test_objectsize_byref_arg(
94; CHECK: ret i64 42
95define i64 @test_objectsize_byref_arg([42 x i8]* byref([42 x i8]) %ptr) {
96  %cast = bitcast [42 x i8]* %ptr to i8*
97  %size = tail call i64 @llvm.objectsize.i64(i8* %cast, i1 true, i1 false, i1 false)
98  ret i64 %size
99}
100