http://llvm.org/bugs/show_bug.cgi?id=22180
Bug ID: 22180
Summary: TypeBasedAliasAnalysis::PathAliases crashes when
processing 'distinct' MDNode
Product: tools
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: llc
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 13659
--> http://llvm.org/bugs/attachment.cgi?id=13659&action=edit
reduced test case
Find attached a bugpoint reduced test case for the issue.
TypeBasedAliasAnalysis::PathAliases at line 409 assumes the MD node has offset
fields which are constants, so it crashes when it processes a node like !9:
!9 = distinct !{!9, !10, !11}
!10 = !{!"llvm.loop.vectorize.width", i32 1}
!11 = !{!"llvm.loop.interleave.count", i32 1}
How to reproduce:
llc -O3 test.ll
llc: ../include/llvm/Support/Casting.h:223: typename std::enable_if<(!
llvm::is_simple_type<Y>::value), typename llvm::cast_retty<X, const
Y>::ret_type>::type llvm::cast(const Y&) [with X = llvm::ConstantAsMetadata; Y
= llvm::MDOperand; typename std::enable_if<(! llvm::is_simple_type<Y>::value),
typename llvm::cast_retty<X, const Y>::ret_type>::type =
llvm::ConstantAsMetadata*]: Assertion `isa<X>(Val) && "cast<Ty>() argument of
incompatible type!"' failed.
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