1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
; RUN: opt -S -instcombine < %s | FileCheck %s
; Instcombine should preserve metadata and alignment while
; folding a bitcast into a store.
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"
%struct.A = type { i32 (...)** }
@G = external constant [5 x i8*]
; CHECK-LABEL: @foo
; CHECK: store i32 %x, i32* %{{.*}}, align 16, !noalias !0, !llvm.access.group !3
define void @foo(i32 %x, float* %p) nounwind {
entry:
%x.cast = bitcast i32 %x to float
store float %x.cast, float* %p, align 16, !noalias !0, !llvm.access.group !3
ret void
}
; Check instcombine doesn't try and fold the following bitcast into the store.
; This transformation would not be safe since we would need to use addrspacecast
; and addrspacecast is not guaranteed to be a no-op cast.
; CHECK-LABEL: @bar
; CHECK: %cast = bitcast i8** %b to i8 addrspace(1)**
; CHECK: store i8 addrspace(1)* %a, i8 addrspace(1)** %cast
define void @bar(i8 addrspace(1)* %a, i8** %b) nounwind {
entry:
%cast = bitcast i8** %b to i8 addrspace(1)**
store i8 addrspace(1)* %a, i8 addrspace(1)** %cast
ret void
}
; Check that we don't combine the bitcast into the store. This would create a
; bitcast of the swifterror which is invalid.
; CHECK-LABEL: @swifterror_store
; CHECK: bitcast i64
; CHECK: store %swift.error
%swift.error = type opaque
define void @swifterror_store(i64* %x, %swift.error** swifterror %err) {
entry:
%casted = bitcast i64* %x to %swift.error*
store %swift.error* %casted, %swift.error** %err
ret void
}
; CHECK-LABEL: @ppcf128_ones_store
; CHECK: store ppc_fp128 0xMFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF, ppc_fp128* %dest, align 16
define void @ppcf128_ones_store(ppc_fp128* %dest) {
entry:
%int = or i128 0, 340282366920938463463374607431768211455 ; 128 ones
%val = bitcast i128 %int to ppc_fp128
store ppc_fp128 %val, ppc_fp128* %dest, align 16
ret void
}
!0 = !{!1}
!1 = !{!1, !2}
!2 = !{!2}
!3 = !{}
|
