| ; RUN: opt < %s -instcombine -S | FileCheck %s | |
| ; PR12234 | |
| @g = extern_weak global i32 | |
| define i32 @function(i32 %x) nounwind { | |
| entry: | |
| %xor = xor i32 %x, 1 | |
| store volatile i32 %xor, i32* inttoptr (i64 1 to i32*), align 4 | |
| %or4 = or i32 or (i32 zext (i1 icmp eq (i32* @g, i32* null) to i32), i32 1), %xor | |
| ret i32 %or4 | |
| } | |
| ; CHECK: define i32 @function |