enable -flto=thin in clang-cl
Summary: This enables LTO to be used with the clang-cl frontend.
Reviewers: rnk, hans
Reviewed By: hans
Subscribers: pcc, cfe-commits, mehdi_amini, Prazek
Differential Revision: https://reviews.llvm.org/D30239
llvm-svn: 296373
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 6defb20..78e99d4 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -2353,8 +2353,12 @@
Arg *FinalPhaseArg;
phases::ID FinalPhase = getFinalPhase(Args, &FinalPhaseArg);
- if (FinalPhase == phases::Link && Args.hasArg(options::OPT_emit_llvm)) {
- Diag(clang::diag::err_drv_emit_llvm_link);
+ if (FinalPhase == phases::Link) {
+ if (Args.hasArg(options::OPT_emit_llvm))
+ Diag(clang::diag::err_drv_emit_llvm_link);
+ if (IsCLMode() && LTOMode != LTOK_None &&
+ !Args.getLastArgValue(options::OPT_fuse_ld_EQ).equals_lower("lld"))
+ Diag(clang::diag::err_drv_lto_without_lld);
}
// Reject -Z* at the top level, these options should never have been exposed