| ; RUN: opt -S -jump-threading -verify -o - %s | FileCheck %s | |
| @a = external global i16, align 1 | |
| ; CHECK-LABEL: f | |
| ; CHECK: bb6: | |
| ; CHECK: bb2: | |
| ; CHECK: bb3: | |
| ; CHECK-NOT: bb0: | |
| ; CHECK-NOT: bb1: | |
| ; CHECK-NOT: bb4: | |
| ; CHECK-NOT: bb5: | |
| define void @f(i32 %p1) { | |
| bb0: | |
| %0 = icmp eq i32 %p1, 0 | |
| br i1 undef, label %bb6, label %bb1 | |
| bb1: | |
| br label %bb2 | |
| bb2: | |
| %1 = phi i1 [ %0, %bb1 ], [ %2, %bb4 ] | |
| %2 = and i1 %1, undef | |
| br i1 %2, label %bb3, label %bb4 | |
| bb3: | |
| store i16 undef, i16* @a, align 1 | |
| br label %bb4 | |
| bb4: | |
| br i1 %0, label %bb2, label %bb5 | |
| bb5: | |
| unreachable | |
| bb6: | |
| ret void | |
| } |