Driver: Fix possible crash when targetting an unknown (unsupported) Darwin

platform, e.g. ppc.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99016 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 8 insertions, 0 deletions

diff --git a/lib/Driver/ToolChains.h b/lib/Driver/ToolChains.h
index 6dd64dec9e..0d5b2a3f47 100644
--- a/lib/Driver/ToolChains.h
+++ b/lib/Driver/ToolChains.h
@@ -96,6 +96,8 @@ public:
     return TargetIsIPhoneOS;
   }
 
+  bool isTargetInitialized() const { return TargetInitialized; }
+
   void getTargetVersion(unsigned (&Res)[3]) const {
     assert(TargetInitialized && "Target not initialized!");
     Res[0] = TargetVersion[0];
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 86b46856d3..58a4cdb89b 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -655,6 +655,12 @@ static std::string getEffectiveClangTriple(const Driver &D,
   } else {
     const toolchains::Darwin &DarwinTC(
       reinterpret_cast<const toolchains::Darwin&>(TC));
+
+    // If the target isn't initialized (e.g., an unknown Darwin platform, return
+    // the default triple).
+    if (!DarwinTC.isTargetInitialized())
+      return Triple.getTriple();
+    
     unsigned Version[3];
     DarwinTC.getTargetVersion(Version);