1 ; RUN: opt -S -instcombine < %s | FileCheck %s
3 ; Instcombine should preserve metadata and alignment while
4 ; folding a bitcast into a store.
6 target 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"
8 %struct.A = type { i32 (...)** }
10 @G = external constant [5 x i8*]
13 ; CHECK: store i32 %x, i32* %{{.*}}, align 16, !noalias !0, !llvm.access.group !1
14 define void @foo(i32 %x, float* %p) nounwind {
16 %x.cast = bitcast i32 %x to float
17 store float %x.cast, float* %p, align 16, !noalias !0, !llvm.access.group !1
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.
26 ; CHECK: %cast = bitcast i8** %b to i8 addrspace(1)**
27 ; CHECK: store i8 addrspace(1)* %a, i8 addrspace(1)** %cast
28 define void @bar(i8 addrspace(1)* %a, i8** %b) nounwind {
30 %cast = bitcast i8** %b to i8 addrspace(1)**
31 store i8 addrspace(1)* %a, i8 addrspace(1)** %cast
35 ; Check that we don't combine the bitcast into the store. This would create a
36 ; bitcast of the swifterror which is invalid.
38 ; CHECK-LABEL; @swifterror_store
40 ; CHECK: store %swift.error
42 %swift.error = type opaque
43 define void @swifterror_store(i64* %x, %swift.error** swifterror %err) {
45 %casted = bitcast i64* %x to %swift.error*
46 store %swift.error* %casted, %swift.error** %err