1; RUN: llc < %s -O0 -march=x86 | 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-S128"
4target triple = "x86_64-unknown-linux-gnu"
5
6@glbl = extern_weak constant i8
7
8declare i64 @llvm.expect.i64(i64, i64)
9
10define void @test() {
11; CHECK: movl $glbl
12  %tmp = call i64 @llvm.expect.i64(i64 zext (i1 icmp eq (i8* @glbl, i8* null) to i64), i64 0)
13  %tmp2 = icmp ne i64 %tmp, 0
14  br i1 %tmp2, label %bb1, label %bb2
15
16bb1:
17  unreachable
18
19bb2:
20  unreachable
21}
22