[cfe-commits] r82021 - /cfe/trunk/lib/Driver/Tools.cpp

[Daniel Dunbar]

Author: ddunbar
Date: Wed Sep 16 01:17:29 2009
New Revision: 82021

URL: http://llvm.org/viewvc/llvm-project?rev=82021&view=rev
Log:
Incremental improvement to logic determining whether we emit unwind tables or
not.
 - PR4932.

Modified:
    cfe/trunk/lib/Driver/Tools.cpp

Modified: cfe/trunk/lib/Driver/Tools.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=82021&r1=82020&r2=82021&view=diff

==============================================================================
--- cfe/trunk/lib/Driver/Tools.cpp (original)
+++ cfe/trunk/lib/Driver/Tools.cpp Wed Sep 16 01:17:29 2009
@@ -623,10 +623,17 @@
     CmdArgs.push_back("--debug-pass=Arguments");
   // FIXME: set --inline-threshhold=50 if (optimize_size || optimize
   // < 3)
-  if (Args.hasFlag(options::OPT_funwind_tables,
-                   options::OPT_fno_unwind_tables,
-                   (getToolChain().IsUnwindTablesDefault() &&
-                    !Args.hasArg(options::OPT_mkernel))))
+
+  // This is a coarse approximation of what llvm-gcc actually does, both
+  // -fasynchronous-unwind-tables and -fnon-call-exceptions interact in more
+  // complicated ways.
+  bool AsynchronousUnwindTables =
+    Args.hasFlag(options::OPT_fasynchronous_unwind_tables,
+                 options::OPT_fno_asynchronous_unwind_tables,
+                 getToolChain().IsUnwindTablesDefault() &&
+                 !Args.hasArg(options::OPT_mkernel));
+  if (Args.hasFlag(options::OPT_funwind_tables, options::OPT_fno_unwind_tables,
+                   AsynchronousUnwindTables))
     CmdArgs.push_back("--unwind-tables=1");
   else
     CmdArgs.push_back("--unwind-tables=0");