mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-04 06:09:05 +00:00
e78760e179
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8558 91177308-0d34-0410-b5e6-96231b3b80d8
19 lines
614 B
LLVM
19 lines
614 B
LLVM
; This testcase makes sure that size is taken to account when alias analysis
|
|
; is performed. It is not legal to delete the second load instruction because
|
|
; the value computed by the first load instruction is changed by the store.
|
|
|
|
; RUN: llvm-as < %s | opt -load-vn -gcse -instcombine | llvm-dis | grep DONOTREMOVE
|
|
|
|
int %test() {
|
|
%A = alloca int
|
|
store int 0, int* %A
|
|
%X = load int* %A
|
|
%B = cast int* %A to sbyte*
|
|
%C = getelementptr sbyte* %B, long 1
|
|
store sbyte 1, sbyte* %C ; Aliases %A
|
|
%Y.DONOTREMOVE = load int* %A
|
|
%Z = sub int %X, %Y.DONOTREMOVE
|
|
ret int %Z
|
|
}
|
|
|