Win64: Disable uwtable until we fix .pdata emission in LLVM

LLVM r211399 started emitting .pdata for win64 by default.
Unfortunately, it produces invalid object files.  I plan to fix that
Soon.  For now, don't request unwind tables.  This fixes the clang-cl
self-host on win64.

llvm-svn: 212137

diff --git a/clang/lib/Driver/WindowsToolChain.cpp b/clang/lib/Driver/WindowsToolChain.cpp
index a1ba7a7..913425a 100644 (file)
--- a/clang/lib/Driver/WindowsToolChain.cpp
+++ b/clang/lib/Driver/WindowsToolChain.cpp
@@ -59,7 +59,11 @@ bool Windows::IsIntegratedAssemblerDefault() const {
 }
 
 bool Windows::IsUnwindTablesDefault() const {
-  return getArch() == llvm::Triple::x86_64;
+  // FIXME: LLVM's lowering of Win64 data is broken right now.  MSVC's linker
+  // says that our object files provide invalid .pdata contributions.  Until
+  // that is fixed, don't ask for unwind tables.
+  return false;
+  //return getArch() == llvm::Triple::x86_64;
 }
 
 bool Windows::isPICDefault() const {