xref: /llvm-project/llvm/test/Transforms/JumpThreading/threading_prof3.ll (revision a1b78fb929fccf96acaa0212cf68fee82298e747) 
1; RUN: opt -passes=jump-threading -S < %s | FileCheck %s
2
3; Check that all zero branch weights do not cause a crash.
4define void @zero_branch_weights(i32 %tmp, i32 %tmp3) {
5bb:
6  %tmp1 = icmp eq i32 %tmp, 1
7  br i1 %tmp1, label %bb5, label %bb2
8; CHECK-NOT: br i1 %tmp1,{{.*}} !prof
9
10bb2:
11  %tmp4 = icmp ne i32 %tmp3, 1
12  br label %bb5
13; CHECK: br i1 %tmp4, {{.*}} !prof ![[PROF:[0-9]+]]
14
15bb5:
16  %tmp6 = phi i1 [ false, %bb ], [ %tmp4, %bb2 ]
17  br i1 %tmp6, label %bb8, label %bb7, !prof !{!"branch_weights", i32 0, i32 0}
18
19bb7:
20  br label %bb9
21
22bb8:
23  br label %bb9
24
25bb9:
26  ret void
27}
28
29;CHECK: ![[PROF]] = !{!"branch_weights", i32 -2147483648, i32 0}
30