[MS ABI] Update EH emission for MSVC 2015 compatibility

MSVC 2015 renamed the symbol found by name lookup for 'std::terminate'
so we cannot rely on using '?terminate@@YAXXZ'.  Furthermore, it seems
that 2015 will be the first release of MSVC which permits inlining a
function which is noexcept into a function which isn't.  This is
implemented by creating a cleanup for the invoker which jumps to
__std_terminate.  Clang's implementation of this aspect of the MSVC
scheme is slightly less efficient in this respect because we use a
catch handler configured as a catch-all handler instead.

llvm-svn: 236961

1 files changed, 4 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CGException.cpp b/clang/lib/CodeGen/CGException.cpp
index 337aaf23fd0..6e0bdd24a75 100644
--- a/clang/lib/CodeGen/CGException.cpp
+++ b/clang/lib/CodeGen/CGException.cpp
@@ -60,7 +60,10 @@ llvm::Constant *CodeGenModule::getTerminateFn() {
     name = "_ZSt9terminatev";
   } else if (getLangOpts().CPlusPlus &&
              getTarget().getCXXABI().isMicrosoft()) {
-    name = "\01?terminate@@YAXXZ";
+    if (getLangOpts().isCompatibleWithMSVC(19))
+      name = "__std_terminate";
+    else
+      name = "\01?terminate@@YAXXZ";
   } else if (getLangOpts().ObjC1 &&
              getLangOpts().ObjCRuntime.hasTerminate())
     name = "objc_terminate";