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

1 files changed, 6 insertions, 0 deletions

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);