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From: Villmow, Micah Sent: Tuesday, November 06, 2012 1:37 PM To: 'llvm-dev at cs.uiuc.edu' Cc: Guo, Xiaoyi Subject: Bug in SelectionDAG visitTargetIntrinsic We ran into a problem where specifying IntrNoMem was causing our instruction selection to fail with target specific intrinsics. After looking into the code and ISel debug it looks like tablegen and SelectionDAG are using different

void SelectionDAGBuilder::visitTargetIntrinsic(const CallInst &I, - unsigned Intrinsic) { - bool HasChain = !I.doesNotAccessMemory(); - bool OnlyLoad = HasChain && I.onlyReadsMemory(); + unsigned Intrinsic) { + // Info is set by getTgtMemInstrinsic + TargetLowering::IntrinsicInfo Info; + bool IsTgtIntrinsic = TLI.getTgtMemIntrinsic(Info, I, Intrin...

Tks Tom, That is my confusing part. How can I make it to "access memory” so it will HasChain? Is there any flag set like in typeProfile, Node, instructions? myLoad, mayStore, SDNPHasChain? -kevin On Jul 18, 2014, at 4:26 PM, Tom Stellard <tom at stellard.net> wrote: > On Fri, Jul 18, 2014 at 04:15:45PM -0400, kewuzhang wrote: >> sure! >> >> class TEST_INTI...

...>>> So I am lowering it and think I need to catch it in lowerINTRINSIC_W_CHAIN, but somehow it always fall into INTRINSIC_WO_CHAIN category. >>>> >>>> I put [IntrReadwriteArgMem] into my Intrinsic class definition, it did not help. >>>> tried put [SDNPHasChain] into intrinsic class definition, cause errors” Element type mismatch for list”. >>>> >>>> wondering how to flag it to INTRINSIC_W_CHAIN? >>> >>> >>> Does it have chain in the initial DAG? >>> >>> -Krzysztof >>> &g...