Incremental improvement to logic determining whether we emit unwind tables or
not.
- PR4932.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82021 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index cca52de..da533f1 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -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");