search for: getfordest

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2015 Dec 12
2
Objects of MemoryLocation class are created for ‘llvm.memset.*‘ intrinsics
...the memset intrinsic. MemoryLocation objects are only involved for the regular memory accesses being compared to the unknown instruction. See AliasSet::aliasesUnknownInst in lib/Analysis/AliasSetTracker.cpp. > > We do know how to create MemoryLocation objects for memsets, see MemoryLocation::getForDest, but we don't do so in the AliasSetTracker. We're taking advantage here of the fast that AA's getModRefInfo understands (or should understand) enough about memset to accurately answer the queries. Hi Hal, Thank you for the explanation! -- Cheers,...
2015 Dec 06
2
Objects of MemoryLocation class are created for ‘llvm.memset.*‘ intrinsics
Dear llvm contributors, Could you please advise me where objects of MemoryLocation class are created for ‘llvm.memset.*‘ intrinsics? In the Bug 23077 (https://llvm.org/bugs/show_bug.cgi?id=23077) the AliasSetTracker constructs 128 alias sets for 0 pointer values, which contain only unknown instructions. In this case, all unknown instructions, which are added to new alias sets in the