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Added LICM test cases to:

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1) Check that trapping instructionns that are not guaranteed to execute are not hoisted.
2) Check that trapping instructions that are guaranteed to execute are hoisted.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7613 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tanya Lattner 2003-08-05 18:52:42 +00:00
parent 9966c03aad
commit 7526eed382
2 changed files with 47 additions and 0 deletions
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27
test/Transforms/LICM/2003-08-04-TrappingInstHoist.ll Normal file
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; This testcase tests for a problem where LICM hoists
; potentially trapping instructions when they are not guaranteed to execute.
;
; RUN: as < %s | opt -licm | dis | grep -C 2 "IfUnEqual" | grep div
%X = global int 0
declare void %foo()
int %test(bool %c) {
%A = load int *%X
br label %Loop
Loop:
call void %foo()
br bool %c, label %LoopTail, label %IfUnEqual
IfUnEqual:
%B1 = div int 4, %A ;; Should not hoist this div!
br label %LoopTail
LoopTail:
%B = phi int [ 0, %Loop ], [ %B1, %IfUnEqual]
br bool %c, label %Loop, label %Out
Out:
%C = sub int %A, %B
ret int %C
}

20
test/Transforms/LICM/2003-08-04-TrappingInstOkHoist.ll Normal file
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; This testcase tests to make sure a trapping instruction is hoisted when
; it is guaranteed to execute.
;
; RUN: as < %s | opt -licm | dis | grep -C 2 "test" | grep div
%X = global int 0
declare void %foo()
int %test(bool %c) {
%A = load int *%X
br label %Loop
Loop:
call void %foo()
%B = div int 4, %A ;; Should have hoisted this div!
br bool %c, label %Loop, label %Out
Out:
%C = sub int %A, %B
ret int %C
}