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New testcase for size tracking brokenness

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5644 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-02-26 21:39:52 +00:00
parent a36635aba7
commit 2271fddb6d
4 changed files with 52 additions and 0 deletions
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18
test/Analysis/BasicAA/2003-02-26-AccessSizeTest.ll Normal file
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@ -0,0 +1,18 @@
; 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: as < %s | opt -load-vn -gcse -instcombine | 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
}

8
test/Analysis/BasicAA/featuretest.ll
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@ -62,3 +62,11 @@ int %gep_distance_test2({int,int}* %A, long %distance) {
%r = sub int %REMOVEu, %REMOVEv
ret int %r
}
int %foo(int * %A) {
%X = load int* %A
%B = cast int* %A to sbyte*
%C = getelementptr sbyte* %B, long 4
%Y = load sbyte* %C
ret int 8
}

18
test/Transforms/BasicAA/2003-02-26-AccessSizeTest.ll Normal file
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@ -0,0 +1,18 @@
; 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: as < %s | opt -load-vn -gcse -instcombine | 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
}

8
test/Transforms/BasicAA/featuretest.ll
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@ -62,3 +62,11 @@ int %gep_distance_test2({int,int}* %A, long %distance) {
%r = sub int %REMOVEu, %REMOVEv
ret int %r
}
int %foo(int * %A) {
%X = load int* %A
%B = cast int* %A to sbyte*
%C = getelementptr sbyte* %B, long 4
%Y = load sbyte* %C
ret int 8
}