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e4b56572f9
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23317 91177308-0d34-0410-b5e6-96231b3b80d8
29 lines
1.3 KiB
LLVM
29 lines
1.3 KiB
LLVM
; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep 'add uint %iv.*inc, 1'
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;
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; Make sure that the use of the IV outside of the loop (the store) uses the
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; post incremented value of the IV, not the preincremented value. This
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; prevents the loop from having to keep the post and pre-incremented value
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; around for the duration of the loop, adding a copy and an extra register
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; to the loop.
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declare bool %pred(int %X)
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void %test([700 x int]* %nbeaux_.0__558, int* %i_.16574) {
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then.0:
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br label %no_exit.2
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no_exit.2: ; preds = %no_exit.2, %then.0
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%indvar630 = phi uint [ 0, %then.0 ], [ %indvar.next631, %no_exit.2 ] ; <uint> [#uses=3]
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%indvar630 = cast uint %indvar630 to int ; <int> [#uses=1]
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%tmp.38 = getelementptr [700 x int]* %nbeaux_.0__558, int 0, uint %indvar630 ; <int*> [#uses=1]
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store int 0, int* %tmp.38
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%inc.2 = add int %indvar630, 2 ; <int> [#uses=2]
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%tmp.34 = call bool %pred(int %indvar630)
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%indvar.next631 = add uint %indvar630, 1 ; <uint> [#uses=1]
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br bool %tmp.34, label %no_exit.2, label %loopexit.2.loopexit
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loopexit.2.loopexit: ; preds = %no_exit.2
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store int %inc.2, int* %i_.16574
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ret void
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}
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