You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
36 lines
1.1 KiB
36 lines
1.1 KiB
; 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
|
|
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
|
|
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
|
|
}
|
|
|
|
!0 = !{!0}
|