Win64: Add the uwtable attribute by default on Win64

Now that LLVM emits correct .pdata and .xdata for inline functions, we
can reenable this.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@217178 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/WindowsToolChain.cpp b/lib/Driver/WindowsToolChain.cpp
index 913425a19f0046129d18d69c4384d9b55d5c60f2..ca4aa6780b5ce9bc02dac389fb8f37f534a86eeb 100644 (file)
--- a/lib/Driver/WindowsToolChain.cpp
+++ b/lib/Driver/WindowsToolChain.cpp
@@ -59,11 +59,10 @@ bool Windows::IsIntegratedAssemblerDefault() const {
 }
 
 bool Windows::IsUnwindTablesDefault() const {
-  // 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;
+  // Emit unwind tables by default on Win64. All non-x86_32 Windows platforms
+  // such as ARM and PPC actually require unwind tables, but LLVM doesn't know
+  // how to generate them yet.
+  return getArch() == llvm::Triple::x86_64;
 }
 
 bool Windows::isPICDefault() const {