xref: /llvm-project/llvm/test/Transforms/FunctionSpecialization/bug52821-use-after-free.ll (revision f952bc05fda6647bedadf552c5aa5b00672861fc)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -passes="ipsccp<func-spec>" -S < %s | FileCheck %s
3
4%mystruct = type { i32, [2 x i64] }
5
6define internal ptr @myfunc(ptr %arg) {
7; CHECK-LABEL: @myfunc(
8; CHECK-NEXT:  entry:
9; CHECK-NEXT:    br label [[FOR_COND:%.*]]
10; CHECK:       for.cond:
11; CHECK-NEXT:    br label [[FOR_COND2:%.*]]
12; CHECK:       for.cond2:
13; CHECK-NEXT:    br label [[FOR_BODY2:%.*]]
14; CHECK:       for.body2:
15; CHECK-NEXT:    br label [[FOR_COND2]]
16;
17entry:
18  br label %for.cond
19
20for.cond:                                     ; preds = %for.body, %entry
21  %phi = phi ptr [ undef, %for.body ], [ null, %entry ]
22  %cond = icmp eq ptr %phi, null
23  br i1 %cond, label %for.cond2, label %for.body
24
25for.body:                                     ; preds = %for.cond
26  call void @callee(ptr nonnull %phi)
27  br label %for.cond
28
29for.cond2:                                     ; preds = %for.body2, %for.cond
30  %phi2 = phi ptr [ undef, %for.body2 ], [ null, %for.cond ]
31  br i1 false, label %for.end, label %for.body2
32
33for.body2:                                     ; preds = %for.cond2
34  %arrayidx = getelementptr inbounds %mystruct, ptr %phi2, i64 0, i32 1, i64 3
35  br label %for.cond2
36
37for.end:                                      ; preds = %for.cond2
38  ret ptr %arg
39}
40
41define ptr @caller() {
42; CHECK-LABEL: @caller(
43; CHECK-NEXT:  entry:
44; CHECK-NEXT:    [[CALL:%.*]] = call ptr @myfunc(ptr undef)
45; CHECK-NEXT:    ret ptr undef
46;
47entry:
48  %call = call ptr @myfunc(ptr undef)
49  ret ptr %call
50}
51
52declare void @callee(ptr)
53
54