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https://github.com/c64scene-ar/llvm-6502.git
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e6d5d39c07
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48538 91177308-0d34-0410-b5e6-96231b3b80d8
30 lines
1.2 KiB
LLVM
30 lines
1.2 KiB
LLVM
; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | \
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; RUN: grep {add i32 %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 i1 @pred(i32)
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define void @test([700 x i32]* %nbeaux_.0__558, i32* %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.ui = phi i32 [ 0, %then.0 ], [ %indvar.next631, %no_exit.2 ] ; <i32> [#uses=3]
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%indvar630 = bitcast i32 %indvar630.ui to i32 ; <i32> [#uses=2]
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%gep.upgrd.1 = zext i32 %indvar630.ui to i64 ; <i64> [#uses=1]
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%tmp.38 = getelementptr [700 x i32]* %nbeaux_.0__558, i32 0, i64 %gep.upgrd.1 ; <i32*> [#uses=1]
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store i32 0, i32* %tmp.38
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%inc.2 = add i32 %indvar630, 2 ; <i32> [#uses=1]
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%tmp.34 = call i1 @pred( i32 %indvar630 ) ; <i1> [#uses=1]
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%indvar.next631 = add i32 %indvar630.ui, 1 ; <i32> [#uses=1]
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br i1 %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 i32 %inc.2, i32* %i_.16574
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ret void
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}
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