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      1 ; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
      2 
      3 target datalayout =
      4 "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-f128:128:128-n8:16:32:64"
      5 target triple = "x86_64-unknown-linux-gnu"
      6 
      7 @g = external global i31
      8 
      9 define void @main() nounwind uwtable {
     10 entry:
     11 ; CHECK: store i32
     12   store i32 402662078, i32* bitcast (i31* @g to i32*), align 8
     13 ; CHECK-NOT: load i31
     14   %0 = load i31, i31* @g, align 8
     15 ; CHECK: store i31
     16   store i31 %0, i31* undef, align 1
     17   unreachable
     18 }
     19