1; RUN: opt -codegenprepare -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
6; CHECK-LABEL: @test1(
7; objectsize should fold to a constant, which causes the branch to fold to an
8; uncond branch. Next, we fold the control flow alltogether.
9; rdar://8785296
10define i32 @test1(i8* %ptr) nounwind ssp noredzone align 2 {
11entry:
12  %0 = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false, i1 false)
13  %1 = icmp ugt i64 %0, 3
14  br i1 %1, label %T, label %trap
15
16; CHECK: entry:
17; CHECK-NOT: br label %
18
19trap:                                             ; preds = %0, %entry
20  tail call void @llvm.trap() noreturn nounwind
21  unreachable
22
23T:
24; CHECK: ret i32 4
25  ret i32 4
26}
27
28; CHECK-LABEL: @test_objectsize_null_flag(
29define i64 @test_objectsize_null_flag(i8* %ptr) {
30entry:
31  ; CHECK: ret i64 -1
32  %0 = tail call i64 @llvm.objectsize.i64(i8* null, i1 false, i1 true)
33  ret i64 %0
34}
35
36; CHECK-LABEL: @test_objectsize_null_flag_min(
37define i64 @test_objectsize_null_flag_min(i8* %ptr) {
38entry:
39  ; CHECK: ret i64 0
40  %0 = tail call i64 @llvm.objectsize.i64(i8* null, i1 true, i1 true)
41  ret i64 %0
42}
43
44; Test foldable null pointers because we evaluate them with non-exact modes in
45; CodeGenPrepare.
46; CHECK-LABEL: @test_objectsize_null_flag_noas0(
47define i64 @test_objectsize_null_flag_noas0() {
48entry:
49  ; CHECK: ret i64 -1
50  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 false,
51                                               i1 true)
52  ret i64 %0
53}
54
55; CHECK-LABEL: @test_objectsize_null_flag_min_noas0(
56define i64 @test_objectsize_null_flag_min_noas0() {
57entry:
58  ; CHECK: ret i64 0
59  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 true,
60                                               i1 true)
61  ret i64 %0
62}
63
64; CHECK-LABEL: @test_objectsize_null_known_flag_noas0
65define i64 @test_objectsize_null_known_flag_noas0() {
66entry:
67  ; CHECK: ret i64 -1
68  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 false,
69                                               i1 false)
70  ret i64 %0
71}
72
73; CHECK-LABEL: @test_objectsize_null_known_flag_min_noas0
74define i64 @test_objectsize_null_known_flag_min_noas0() {
75entry:
76  ; CHECK: ret i64 0
77  %0 = tail call i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)* null, i1 true,
78                                               i1 false)
79  ret i64 %0
80}
81
82
83declare i64 @llvm.objectsize.i64(i8*, i1, i1) nounwind readonly
84declare i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)*, i1, i1) nounwind readonly
85
86declare void @llvm.trap() nounwind
87