mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-14 13:07:31 +00:00
7c856c09cd
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54832 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.5 KiB
LLVM
83 lines
2.5 KiB
LLVM
; This testcase tests for various features the basicaa test should be able to
|
|
; determine, as noted in the comments.
|
|
|
|
; RUN: llvm-as < %s | opt -basicaa -gvn -instcombine -dce | llvm-dis | not grep REMOVE
|
|
|
|
@Global = external global { i32 }
|
|
|
|
; Array test: Test that operations on one local array do not invalidate
|
|
; operations on another array. Important for scientific codes.
|
|
;
|
|
define i32 @different_array_test(i64 %A, i64 %B) {
|
|
%Array1 = alloca i32, i32 100
|
|
%Array2 = alloca i32, i32 200
|
|
|
|
%pointer = getelementptr i32* %Array1, i64 %A
|
|
%val = load i32* %pointer
|
|
|
|
%pointer2 = getelementptr i32* %Array2, i64 %B
|
|
store i32 7, i32* %pointer2
|
|
|
|
%REMOVE = load i32* %pointer ; redundant with above load
|
|
%retval = sub i32 %REMOVE, %val
|
|
ret i32 %retval
|
|
}
|
|
|
|
; Constant index test: Constant indexes into the same array should not
|
|
; interfere with each other. Again, important for scientific codes.
|
|
;
|
|
define i32 @constant_array_index_test() {
|
|
%Array = alloca i32, i32 100
|
|
%P1 = getelementptr i32* %Array, i64 7
|
|
%P2 = getelementptr i32* %Array, i64 6
|
|
|
|
%A = load i32* %P1
|
|
store i32 1, i32* %P2 ; Should not invalidate load
|
|
%BREMOVE = load i32* %P1
|
|
%Val = sub i32 %A, %BREMOVE
|
|
ret i32 %Val
|
|
}
|
|
|
|
; Test that if two pointers are spaced out by a constant getelementptr, that
|
|
; they cannot alias.
|
|
define i32 @gep_distance_test(i32* %A) {
|
|
%REMOVEu = load i32* %A
|
|
%B = getelementptr i32* %A, i64 2 ; Cannot alias A
|
|
store i32 7, i32* %B
|
|
%REMOVEv = load i32* %A
|
|
%r = sub i32 %REMOVEu, %REMOVEv
|
|
ret i32 %r
|
|
}
|
|
|
|
; Test that if two pointers are spaced out by a constant offset, that they
|
|
; cannot alias, even if there is a variable offset between them...
|
|
define i32 @gep_distance_test2({i32,i32}* %A, i64 %distance) {
|
|
%A1 = getelementptr {i32,i32}* %A, i64 0, i32 0
|
|
%REMOVEu = load i32* %A1
|
|
%B = getelementptr {i32,i32}* %A, i64 %distance, i32 1
|
|
store i32 7, i32* %B ; B cannot alias A, it's at least 4 bytes away
|
|
%REMOVEv = load i32* %A1
|
|
%r = sub i32 %REMOVEu, %REMOVEv
|
|
ret i32 %r
|
|
}
|
|
|
|
; Test that we can do funny pointer things and that distance calc will still
|
|
; work.
|
|
define i32 @gep_distance_test3(i32 * %A) {
|
|
%X = load i32* %A
|
|
%B = bitcast i32* %A to i8*
|
|
%C = getelementptr i8* %B, i64 4
|
|
%Y = load i8* %C
|
|
ret i32 8
|
|
}
|
|
|
|
; Test that we can disambiguate globals reached through constantexpr geps
|
|
define i32 @constexpr_test() {
|
|
%X = alloca i32
|
|
%Y = load i32* %X
|
|
store i32 5, i32* getelementptr ({ i32 }* @Global, i64 0, i32 0)
|
|
%REMOVE = load i32* %X
|
|
%retval = sub i32 %Y, %REMOVE
|
|
ret i32 %retval
|
|
}
|