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new testcase

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llvm-svn: 23312
This commit is contained in:
Chris Lattner 2005-09-12 05:50:15 +00:00
parent 773456a944
commit 963c549bc9
1 changed files with 28 additions and 0 deletions
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28
test/Regression/Transforms/LoopStrengthReduce/use_postinc_value_outside_loop.ll Normal file
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; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep 'add uint %iv..inc, 1'
;
; Make sure that the use of the IV outside of the loop (the store) uses the
; post incremented value of the IV, not the preincremented value. This
; prevents the loop from having to keep the post and pre-incremented value
; around for the duration of the loop, adding a copy and an extra register
; to the loop.
declare bool %pred(int %X)
void %test([700 x int]* %nbeaux_.0__558, int* %i_.16574) {
then.0:
br label %no_exit.2
no_exit.2: ; preds = %no_exit.2, %then.0
%indvar630 = phi uint [ 0, %then.0 ], [ %indvar.next631, %no_exit.2 ] ; <uint> [#uses=3]
%indvar630 = cast uint %indvar630 to int ; <int> [#uses=1]
%tmp.38 = getelementptr [700 x int]* %nbeaux_.0__558, int 0, uint %indvar630 ; <int*> [#uses=1]
store int 0, int* %tmp.38
%inc.2 = add int %indvar630, 2 ; <int> [#uses=2]
%tmp.34 = call bool %pred(int %indvar630)
%indvar.next631 = add uint %indvar630, 1 ; <uint> [#uses=1]
br bool %tmp.34, label %no_exit.2, label %loopexit.2.loopexit
loopexit.2.loopexit: ; preds = %no_exit.2
store int %inc.2, int* %i_.16574
ret void
}