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Add tests of redundant load elimination

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2636 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-05-16 01:03:12 +00:00
parent c95057b1b7
commit 5abaa0c290
2 changed files with 53 additions and 0 deletions
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26
test/Analysis/LoadVN/RLE-Eliminate.ll Normal file
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; This testcase ensures that redundant loads are eliminated when they should
; be. All RL variables (redundant loads) should be eliminated.
;
; RUN: if as < %s | opt -gcse | dis | grep %RL
; RUN: then exit 1
; RUN: else exit 0
; RUN: fi
;
int "test1"(int* %P) {
%A = load int* %P
%RL = load int* %P
%C = add int %A, %RL
ret int %C
}
int "test2"(int* %P) {
%A = load int* %P
br label %BB2
BB2:
br label %BB3
BB3:
%RL = load int* %P
%B = add int %A, %RL
ret int %B
}

27
test/Analysis/LoadVN/RLE-Preserve.ll Normal file
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; This testcase ensures that redundant loads are preserved when they are not
; allowed to be eliminated.
; RUN: as < %s | dis > Output/%s.before
; RUN: as < %s | opt -gcse | dis > Output/%s.after
; RUN: diff Output/%s.before Output/%s.after
;
int "test1"(int* %P) {
%A = load int* %P
store int 1, int * %P
%B = load int* %P
%C = add int %A, %B
ret int %C
}
int "test2"(int* %P) {
%A = load int* %P
br label %BB2
BB2:
store int 5, int * %P
br label %BB3
BB3:
%B = load int* %P
%C = add int %A, %B
ret int %C
}