1; RUN: opt -S -instcombine < %s | FileCheck %s
2
3; Instcombine should preserve metadata and alignment while
4; folding a bitcast into a store.
5
6target 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"
7
8%struct.A = type { i32 (...)** }
9
10@G = external constant [5 x i8*]
11
12; CHECK-LABEL: @foo
13; CHECK: store i32 %x, i32* %{{.*}}, align 16, !noalias !0
14define void @foo(i32 %x, float* %p) nounwind {
15entry:
16  %x.cast = bitcast i32 %x to float
17  store float %x.cast, float* %p, align 16, !noalias !0
18  ret void
19}
20
21; Check instcombine doesn't try and fold the following bitcast into the store.
22; This transformation would not be safe since we would need to use addrspacecast
23; and addrspacecast is not guaranteed to be a no-op cast.
24
25; CHECK-LABEL: @bar
26; CHECK: %cast = bitcast i8** %b to i8 addrspace(1)**
27; CHECK: store i8 addrspace(1)* %a, i8 addrspace(1)** %cast
28define void @bar(i8 addrspace(1)* %a, i8** %b) nounwind {
29entry:
30  %cast = bitcast i8** %b to i8 addrspace(1)**
31  store i8 addrspace(1)* %a, i8 addrspace(1)** %cast
32  ret void
33}
34
35!0 = !{!0}
36