accept "#pragma clang foo" where we accept "#pragma GCC foo".


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71572 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Pragma.cpp b/lib/Lex/Pragma.cpp
index bde3fbc..ce59341 100644
--- a/lib/Lex/Pragma.cpp
+++ b/lib/Lex/Pragma.cpp
@@ -666,6 +666,8 @@
 void Preprocessor::RegisterBuiltinPragmas() {
   AddPragmaHandler(0, new PragmaOnceHandler(getIdentifierInfo("once")));
   AddPragmaHandler(0, new PragmaMarkHandler(getIdentifierInfo("mark")));
+  
+  // #pragma GCC ...
   AddPragmaHandler("GCC", new PragmaPoisonHandler(getIdentifierInfo("poison")));
   AddPragmaHandler("GCC", new PragmaSystemHeaderHandler(
                                           getIdentifierInfo("system_header")));
@@ -673,7 +675,16 @@
                                           getIdentifierInfo("dependency")));
   AddPragmaHandler("GCC", new PragmaDiagnosticHandler(
                                               getIdentifierInfo("diagnostic")));
-  
+  // #pragma clang ...
+  AddPragmaHandler("clang", new PragmaPoisonHandler(
+                                          getIdentifierInfo("poison")));
+  AddPragmaHandler("clang", new PragmaSystemHeaderHandler(
+                                          getIdentifierInfo("system_header")));
+  AddPragmaHandler("clang", new PragmaDependencyHandler(
+                                          getIdentifierInfo("dependency")));
+  AddPragmaHandler("clang", new PragmaDiagnosticHandler(
+                                          getIdentifierInfo("diagnostic")));
+
   AddPragmaHandler("STDC", new PragmaSTDC_FP_CONTRACTHandler(
                                              getIdentifierInfo("FP_CONTRACT")));
   AddPragmaHandler("STDC", new PragmaSTDC_FENV_ACCESSHandler(