llvm/test/Transforms/LoopStrengthReduce/use_postinc_value_outside_loop.ll
Dan Gohman f2f6ce65b7 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-11 18:01:28 +00:00

30 lines
1.2 KiB
LLVM

; RUN: opt < %s -loop-reduce -S | \
; RUN: grep {add i32 %lsr.iv.next, 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 i1 @pred(i32)
define void @test([700 x i32]* %nbeaux_.0__558, i32* %i_.16574) {
then.0:
br label %no_exit.2
no_exit.2: ; preds = %no_exit.2, %then.0
%indvar630.ui = phi i32 [ 0, %then.0 ], [ %indvar.next631, %no_exit.2 ] ; <i32> [#uses=3]
%indvar630 = bitcast i32 %indvar630.ui to i32 ; <i32> [#uses=2]
%gep.upgrd.1 = zext i32 %indvar630.ui to i64 ; <i64> [#uses=1]
%tmp.38 = getelementptr [700 x i32]* %nbeaux_.0__558, i32 0, i64 %gep.upgrd.1 ; <i32*> [#uses=1]
store i32 0, i32* %tmp.38
%inc.2 = add i32 %indvar630, 2 ; <i32> [#uses=1]
%tmp.34 = call i1 @pred( i32 %indvar630 ) ; <i1> [#uses=1]
%indvar.next631 = add i32 %indvar630.ui, 1 ; <i32> [#uses=1]
br i1 %tmp.34, label %no_exit.2, label %loopexit.2.loopexit
loopexit.2.loopexit: ; preds = %no_exit.2
store i32 %inc.2, i32* %i_.16574
ret void
}