[WinEH] Start EH preparation for 32-bit x86, it uses no arguments

32-bit x86 MSVC-style exceptions are functionaly similar to 64-bit, but
they take no arguments. Instead, they implicitly use the value of EBP
passed in by the caller as a pointer to the parent's frame. In LLVM, we
can represent this as llvm.frameaddress(1), and feed that into all of
our calls to llvm.framerecover.

The next steps are:
- Add an alloca to the fs:00 linked list of handlers
- Add something like llvm.sjlj.lsda or generalize it to store in the
  alloca
- Move state number calculation to WinEHPrepare, arrange for
  FunctionLoweringInfo to call it
- Use the state numbers to insert explicit loads and stores in the IR

llvm-svn: 236172

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Analysis/LibCallSemantics.cpp b/llvm/lib/Analysis/LibCallSemantics.cpp
index 328b186b527..e98540ba7e9 100644
--- a/llvm/lib/Analysis/LibCallSemantics.cpp
+++ b/llvm/lib/Analysis/LibCallSemantics.cpp
@@ -73,8 +73,8 @@ EHPersonality llvm::classifyEHPersonality(const Value *Pers) {
     .Case("__gxx_personality_v0",  EHPersonality::GNU_CXX)
     .Case("__gcc_personality_v0",  EHPersonality::GNU_C)
     .Case("__objc_personality_v0", EHPersonality::GNU_ObjC)
-    .Case("__except_handler3",     EHPersonality::MSVC_X86SEH)
-    .Case("__except_handler4",     EHPersonality::MSVC_X86SEH)
+    .Case("_except_handler3",      EHPersonality::MSVC_X86SEH)
+    .Case("_except_handler4",      EHPersonality::MSVC_X86SEH)
     .Case("__C_specific_handler",  EHPersonality::MSVC_Win64SEH)
     .Case("__CxxFrameHandler3",    EHPersonality::MSVC_CXX)
     .Default(EHPersonality::Unknown);