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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100459 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-04-05 20:24:08 +00:00
parent 5c06a20814
commit 7b55d3665c
1 changed files with 6 additions and 0 deletions
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6
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -3518,6 +3518,12 @@ SDValue SelectionDAG::getMemcpy(SDValue Chain, DebugLoc dl, SDValue Dst,
true, DstSV, DstSVOff, SrcSV, SrcSVOff); true, DstSV, DstSVOff, SrcSV, SrcSVOff);
} }
// FIXME: If the memcpy is volatile (isVol), lowering it to a plain libc
// memcpy is not guaranteed to be safe. libc memcpys aren't required to
// respect volatile, so they may do things like read or write memory
// beyond the given memory regions. But fixing this isn't easy, and most
// people don't care.
// Emit a library call. // Emit a library call.
TargetLowering::ArgListTy Args; TargetLowering::ArgListTy Args;
TargetLowering::ArgListEntry Entry; TargetLowering::ArgListEntry Entry;