Add __builtin_setjmp/_longjmp supprt in X86 backend
- Besides used in SjLj exception handling, __builtin_setjmp/__longjmp is also
used as a light-weight replacement of setjmp/longjmp which are used to
implementation continuation, user-level threading, and etc. The support added
in this patch ONLY addresses this usage and is NOT intended to support SjLj
exception handling as zero-cost DWARF exception handling is used by default
in X86.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165989 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index 5a19f8a..0efeef2 100644
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -1302,7 +1302,9 @@
// that are not a MemSDNode, and thus don't have proper addrspace info.
Parent->getOpcode() != ISD::INTRINSIC_W_CHAIN && // unaligned loads, fixme
Parent->getOpcode() != ISD::INTRINSIC_VOID && // nontemporal stores
- Parent->getOpcode() != X86ISD::TLSCALL) { // Fixme
+ Parent->getOpcode() != X86ISD::TLSCALL && // Fixme
+ Parent->getOpcode() != X86ISD::EH_SJLJ_SETJMP && // setjmp
+ Parent->getOpcode() != X86ISD::EH_SJLJ_LONGJMP) { // longjmp
unsigned AddrSpace =
cast<MemSDNode>(Parent)->getPointerInfo().getAddrSpace();
// AddrSpace 256 -> GS, 257 -> FS.