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[X86] Update an outdated comment about SjLj

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The SjLj intrinsics in the X86 backend are intended for use with
SjLj exception handling as well, since SVN r271244.

Differential Revision: https://reviews.llvm.org/D38532

llvm-svn: 315146
This commit is contained in:
Martin Storsjo 2017-10-07 06:00:32 +00:00
parent e79eff3bb5
commit 5e9d482b0a
1 changed files with 2 additions and 6 deletions
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8
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -425,12 +425,8 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
setOperationAction(ISD::SELECT_CC, MVT::x86mmx, Expand);
setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
// NOTE: EH_SJLJ_SETJMP/_LONGJMP supported here is NOT intended to support
// SjLj exception handling but a light-weight setjmp/longjmp replacement to
// support continuation, user-level threading, and etc.. As a result, no
// other SjLj exception interfaces are implemented and please don't build
// your own exception handling based on them.
// LLVM/Clang supports zero-cost DWARF exception handling.
// NOTE: EH_SJLJ_SETJMP/_LONGJMP are not recommended, since
// LLVM/Clang supports zero-cost DWARF and SEH exception handling.
setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
setOperationAction(ISD::EH_SJLJ_SETUP_DISPATCH, MVT::Other, Custom);