1; RUN: opt -simplifycfg -S %s | FileCheck %s
2; Make sure we don't speculate loads under ThreadSanitizer.
3@g = global i32 0, align 4
4
5define i32 @TestNoTsan(i32 %cond) nounwind readonly uwtable {
6entry:
7  %tobool = icmp eq i32 %cond, 0
8  br i1 %tobool, label %return, label %if.then
9
10if.then:                                          ; preds = %entry
11  %0 = load i32* @g, align 4
12  br label %return
13
14return:                                           ; preds = %entry, %if.then
15  %retval = phi i32 [ %0, %if.then ], [ 0, %entry ]
16  ret i32 %retval
17; CHECK-LABEL: @TestNoTsan
18; CHECK: %[[LOAD:[^ ]*]] = load
19; CHECK: select{{.*}}[[LOAD]]
20; CHECK: ret i32
21}
22
23define i32 @TestTsan(i32 %cond) nounwind readonly uwtable sanitize_thread {
24entry:
25  %tobool = icmp eq i32 %cond, 0
26  br i1 %tobool, label %return, label %if.then
27
28if.then:                                          ; preds = %entry
29  %0 = load i32* @g, align 4
30  br label %return
31
32return:                                           ; preds = %entry, %if.then
33  %retval = phi i32 [ %0, %if.then ], [ 0, %entry ]
34  ret i32 %retval
35; CHECK-LABEL: @TestTsan
36; CHECK: br i1
37; CHECK: load i32* @g
38; CHECK: br label
39; CHECK: ret i32
40}
41