mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 00:32:23 +00:00
14285c89e7
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8544 91177308-0d34-0410-b5e6-96231b3b80d8
67 lines
1.5 KiB
LLVM
67 lines
1.5 KiB
LLVM
; Test that GCSE uses ds-aa to do alias analysis, which is capable of
|
|
; disambiguating some cases.
|
|
|
|
; RUN: llvm-as < %s | opt -no-aa -ds-aa -load-vn -gcse -instcombine -dce | llvm-dis | not grep ELIM
|
|
|
|
%intpair = type {int*, int*}
|
|
implementation
|
|
|
|
%intpair *%alloc_pair() {
|
|
%Ap = malloc int
|
|
%Bp = malloc int
|
|
%C = malloc {int*, int*}
|
|
%C1p = getelementptr {int*, int*}* %C, long 0, ubyte 0
|
|
store int* %Ap, int** %C1p
|
|
%C2p = getelementptr {int*, int*}* %C, long 0, ubyte 1
|
|
store int* %Bp, int** %C2p
|
|
ret %intpair* %C
|
|
}
|
|
|
|
int* %getp(%intpair* %P) {
|
|
%pp = getelementptr %intpair* %P, long 0, ubyte 0
|
|
%V = load int** %pp
|
|
ret int *%V
|
|
}
|
|
|
|
int* %getq(%intpair* %P) {
|
|
%pp = getelementptr %intpair* %P, long 0, ubyte 1
|
|
%V = load int** %pp
|
|
ret int *%V
|
|
}
|
|
|
|
int %test() {
|
|
%C = call %intpair* %alloc_pair()
|
|
%A = call int* %getp(%intpair* %C)
|
|
%B = call int* %getp(%intpair* %C)
|
|
%A1 = load int* %A
|
|
|
|
store int 123, int* %B ; Store does alias %A
|
|
|
|
%A2 = load int* %A
|
|
%x = sub int %A1, %A2
|
|
ret int %x
|
|
}
|
|
|
|
int %test2() { ; Test context sensitivity
|
|
%C1 = call %intpair* %alloc_pair()
|
|
%C2 = call %intpair* %alloc_pair()
|
|
%P1 = call int* %getp(%intpair* %C1)
|
|
%P2 = call int* %getp(%intpair* %C2)
|
|
%X = load int* %P1
|
|
store int 7, int* %P2
|
|
%Y = load int* %P1
|
|
%ELIM_x = sub int %X, %Y
|
|
ret int %ELIM_x
|
|
}
|
|
|
|
int %test3() {
|
|
%C = call %intpair* %alloc_pair()
|
|
%P1 = call int* %getp(%intpair* %C)
|
|
%P2 = call int* %getq(%intpair* %C)
|
|
%X = load int* %P1
|
|
store int 7, int* %P2
|
|
%Y = load int* %P1
|
|
%ELIM_x = sub int %X, %Y ; Check field sensitivity
|
|
ret int %ELIM_x
|
|
}
|