1; RUN: opt -S -instcombine < %s | FileCheck %s
2
3; When merging zero sized alloca check that requested alignments of the allocas
4; are obeyed.
5
6@x = global i8* null, align 8
7@y = global i8* null, align 8
8
9target 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"
10target triple = "x86_64-apple-macosx10.8.0"
11
12; CHECK-LABEL: @f(
13; CHECK-NEXT: alloca [0 x i8], align 1024
14; CHECK-NOT: alloca
15; CHECK: ret void
16define void @f() {
17  %1 = alloca [0 x i8], align 1
18  %2 = alloca [0 x i8], align 1024
19  %3 = getelementptr inbounds [0 x i8]* %1, i64 0, i64 0
20  %4 = getelementptr inbounds [0 x i8]* %2, i64 0, i64 0
21  store i8* %3, i8** @x, align 8
22  store i8* %4, i8** @y, align 8
23  ret void
24}
25