Move vtable type metadata emission behind a cc1-level flag.
In ThinLTO mode, type metadata will require the module to be written as a
multi-module bitcode file, which is currently incompatible with the Darwin
linker. It is also useful to be able to enable or disable multi-module bitcode
for testing purposes. This introduces a cc1-level flag, -f{,no-}lto-unit,
which is used by the driver to enable multi-module bitcode on all but
Darwin+ThinLTO, and can also be used to enable/disable the feature manually.
Differential Revision: https://reviews.llvm.org/D28877
llvm-svn: 292448
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 2db6e0c..8256edd 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -631,6 +631,7 @@
Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
const Arg *A = Args.getLastArg(OPT_flto, OPT_flto_EQ);
Opts.EmitSummaryIndex = A && A->containsValue("thin");
+ Opts.LTOUnit = Args.hasFlag(OPT_flto_unit, OPT_fno_lto_unit, false);
if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
if (IK != IK_LLVM_IR)
Diags.Report(diag::err_drv_argument_only_allowed_with)