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cfc42962c8
The doFinalization method checks that the LoopToAliasSetMap is empty. LICM populates that map as it runs through the loop nest, deleting the entries for child loops as it goes. However, if a child loop is deleted by another pass (e.g. unrolling) then the loop will never be deleted from the map because LICM walks the loop nest to find entries it can delete. The fix is to delete the loop from the map and free the alias set when the loop is deleted from the loop nest. Differential Revision: http://reviews.llvm.org/D5305 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218387 91177308-0d34-0410-b5e6-96231b3b80d8
31 lines
681 B
LLVM
31 lines
681 B
LLVM
; RUN: opt < %s -scalar-evolution -licm -loop-unroll -disable-output
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; Test triggered an assertion in doFinalization() because loop unroll was deleting
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; the inner loop which caused the loop to not get removed from the
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; LoopToAliasSetMap.
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; Test case taken from test/Transforms/LoopUnroll/unloop.ll.
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declare i1 @check() nounwind
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define void @skiplevelexit() nounwind {
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entry:
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br label %outer
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outer:
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br label %inner
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inner:
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%iv = phi i32 [ 0, %outer ], [ %inc, %tail ]
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%inc = add i32 %iv, 1
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call zeroext i1 @check()
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br i1 true, label %outer.backedge, label %tail
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tail:
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br i1 false, label %inner, label %exit
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outer.backedge:
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br label %outer
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exit:
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ret void
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}
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