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into an inner loop, as the new loop iteration may differ substantially. This fixes PR8078. llvm-svn: 113057
51 lines
1.7 KiB
LLVM
51 lines
1.7 KiB
LLVM
; RUN: opt -S < %s -indvars | opt -analyze -iv-users | grep {%cmp = icmp slt i32} | grep {= \{%\\.ph,+,1\}<%for.cond>}
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; PR8079
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; LoopSimplify should invalidate indvars when splitting out the
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; inner loop.
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@maxStat = external global i32
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define i32 @test() nounwind {
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entry:
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br label %for.cond
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for.cond: ; preds = %if.then5, %if.end, %entry
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%cuts.1 = phi i32 [ 0, %entry ], [ %inc, %if.then5 ], [ %cuts.1, %if.end ]
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%0 = phi i32 [ 0, %entry ], [ %add, %if.end ], [ %add, %if.then5 ]
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%add = add i32 %0, 1
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%cmp = icmp slt i32 %0, 1
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%tmp1 = load i32* @maxStat, align 4
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br i1 %cmp, label %for.body, label %for.cond14.preheader
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for.cond14.preheader: ; preds = %for.cond
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%cmp1726 = icmp sgt i32 %tmp1, 0
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br i1 %cmp1726, label %for.body18, label %return
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for.body: ; preds = %for.cond
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%cmp2 = icmp sgt i32 %tmp1, 100
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br i1 %cmp2, label %return, label %if.end
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if.end: ; preds = %for.body
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%cmp4 = icmp sgt i32 %tmp1, -1
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br i1 %cmp4, label %if.then5, label %for.cond
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if.then5: ; preds = %if.end
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call void @foo() nounwind
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%inc = add i32 %cuts.1, 1
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br label %for.cond
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for.body18: ; preds = %for.body18, %for.cond14.preheader
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%i13.027 = phi i32 [ %1, %for.body18 ], [ 0, %for.cond14.preheader ]
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call void @foo() nounwind
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%1 = add nsw i32 %i13.027, 1
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%tmp16 = load i32* @maxStat, align 4
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%cmp17 = icmp slt i32 %1, %tmp16
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br i1 %cmp17, label %for.body18, label %return
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return: ; preds = %for.body18, %for.body, %for.cond14.preheader
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ret i32 0
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}
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declare void @foo() nounwind
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