From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Sun, 25 Aug 2013 14:27:09 +0000 (+0000)
Subject: Produce an error when trying to link with -emit-llvm.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6db9088fc496acfc365485178d4712aba41c61ee;p=clang

Produce an error when trying to link with -emit-llvm.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189193 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Basic/DiagnosticDriverKinds.td b/include/clang/Basic/DiagnosticDriverKinds.td
index 81c1e5849f..26d39149e6 100644
--- a/include/clang/Basic/DiagnosticDriverKinds.td
+++ b/include/clang/Basic/DiagnosticDriverKinds.td
@@ -109,6 +109,8 @@ def err_drv_mg_requires_m_or_mm : Error<
   "option '-MG' requires '-M' or '-MM'">;
 def err_drv_unknown_objc_runtime : Error<
   "unknown or ill-formed Objective-C runtime '%0'">;
+def err_drv_emit_llvm_link : Error<
+   "-emit-llvm cannot be used when linking">;
 
 def warn_c_kext : Warning<
   "ignoring -fapple-kext which is valid for C++ and Objective-C++ only">;
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index a309625ac4..de589628b7 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -1171,6 +1171,10 @@ void Driver::BuildActions(const ToolChain &TC, DerivedArgList &Args,
   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);
+  }
+
   // Reject -Z* at the top level, these options should never have been exposed
   // by gcc.
   if (Arg *A = Args.getLastArg(options::OPT_Z_Joined))
diff --git a/test/Driver/lto.c b/test/Driver/lto.c
index 511c19b578..91524bf78b 100644
--- a/test/Driver/lto.c
+++ b/test/Driver/lto.c
@@ -18,3 +18,5 @@
 // RUN: %clang %s -flto -S -### 2> %t.log
 // RUN: grep '"-o" ".*lto\.s" "-x" "c" ".*lto\.c"' %t.log
 
+// RUN: not %clang %s -emit-llvm 2>&1 | FileCheck --check-prefix=LLVM-LINK %s
+// LLVM-LINK: -emit-llvm cannot be used when linking