[SEH] Outline finally blocks using the new variable capture support

WinEHPrepare was going to have to pattern match the control flow merge
and split that the old lowering used, and that wasn't really feasible.

Now we can teach WinEHPrepare to pattern match this, which is much
simpler:
  %fp = call i8* @llvm.frameaddress(i32 0)
  call void @func(iN [01], i8* %fp)

This prototype happens to match the prototype used by the Win64 SEH
personality function, so this is really simple.

llvm-svn: 234532

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index f890719c209..6e55655d85b 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -166,6 +166,8 @@ public:
                                      raw_ostream &Out) override;
   void mangleSEHFilterExpression(const NamedDecl *EnclosingDecl,
                                  raw_ostream &Out) override;
+  void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
+                             raw_ostream &Out) override;
   void mangleItaniumThreadLocalInit(const VarDecl *D, raw_ostream &) override;
   void mangleItaniumThreadLocalWrapper(const VarDecl *D,
                                        raw_ostream &) override;
@@ -3967,6 +3969,16 @@ void ItaniumMangleContextImpl::mangleSEHFilterExpression(
     Mangler.getStream() << EnclosingDecl->getName();
 }
 
+void ItaniumMangleContextImpl::mangleSEHFinallyBlock(
+    const NamedDecl *EnclosingDecl, raw_ostream &Out) {
+  CXXNameMangler Mangler(*this, Out);
+  Mangler.getStream() << "__fin_";
+  if (shouldMangleDeclName(EnclosingDecl))
+    Mangler.mangle(EnclosingDecl);
+  else
+    Mangler.getStream() << EnclosingDecl->getName();
+}
+
 void ItaniumMangleContextImpl::mangleItaniumThreadLocalInit(const VarDecl *D,
                                                             raw_ostream &Out) {
   //  <special-name> ::= TH <object name>