mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 00:32:23 +00:00
91b2307a89
gep P, (zext x) != gep P, (sext x) DecomposeGEPExpression was getting this wrong, confusing basicaa. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111352 91177308-0d34-0410-b5e6-96231b3b80d8
128 lines
3.9 KiB
LLVM
128 lines
3.9 KiB
LLVM
; This testcase tests for various features the basicaa test should be able to
|
|
; determine, as noted in the comments.
|
|
|
|
; RUN: opt < %s -basicaa -gvn -instcombine -dce -S | FileCheck %s
|
|
target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
|
|
|
|
@Global = external global { i32 }
|
|
|
|
declare void @external(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
|
|
|
|
call void @external(i32* %Array1)
|
|
call void @external(i32* %Array2)
|
|
|
|
%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
|
|
; CHECK: @different_array_test
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
; 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
|
|
call void @external(i32* %Array)
|
|
|
|
%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
|
|
; CHECK: @constant_array_index_test
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
; 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
|
|
; CHECK: @gep_distance_test
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
; 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
|
|
; CHECK: @gep_distance_test2
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
; 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
|
|
store i8 42, i8* %C
|
|
%Y = load i32* %A
|
|
%R = sub i32 %X, %Y
|
|
ret i32 %R
|
|
; CHECK: @gep_distance_test3
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
; Test that we can disambiguate globals reached through constantexpr geps
|
|
define i32 @constexpr_test() {
|
|
%X = alloca i32
|
|
call void @external(i32* %X)
|
|
|
|
%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
|
|
; CHECK: @constexpr_test
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
|
|
|
|
; PR7589
|
|
; These two index expressions are different, this cannot be CSE'd.
|
|
define i16 @zext_sext_confusion(i16* %row2col, i5 %j) nounwind{
|
|
entry:
|
|
%sum5.cast = zext i5 %j to i64 ; <i64> [#uses=1]
|
|
%P1 = getelementptr i16* %row2col, i64 %sum5.cast
|
|
%row2col.load.1.2 = load i16* %P1, align 1 ; <i16> [#uses=1]
|
|
|
|
%sum13.cast31 = sext i5 %j to i6 ; <i6> [#uses=1]
|
|
%sum13.cast = zext i6 %sum13.cast31 to i64 ; <i64> [#uses=1]
|
|
%P2 = getelementptr i16* %row2col, i64 %sum13.cast
|
|
%row2col.load.1.6 = load i16* %P2, align 1 ; <i16> [#uses=1]
|
|
|
|
%.ret = sub i16 %row2col.load.1.6, %row2col.load.1.2 ; <i16> [#uses=1]
|
|
ret i16 %.ret
|
|
; CHECK: @zext_sext_confusion
|
|
; CHECK: ret i16 %.ret
|
|
}
|