People put pragmas in crazy places; add more handling. PR14046.

I think our general framework for parser pragmas needs a bit more work,
but I'm not planning on working on it at the moment.

llvm-svn: 165558

clang/lib/Parse/ParseStmt.cpp

@@ -254,11 +254,31 @@ Retry:
     HandlePragmaPack();
     return StmtEmpty();
 
+  case tok::annot_pragma_msstruct:
+    ProhibitAttributes(Attrs);
+    HandlePragmaMSStruct();
+    return StmtEmpty();
+
   case tok::annot_pragma_align:
     ProhibitAttributes(Attrs);
     HandlePragmaAlign();
     return StmtEmpty();
 
+  case tok::annot_pragma_weak:
+    ProhibitAttributes(Attrs);
+    HandlePragmaWeak();
+    return StmtEmpty();
+
+  case tok::annot_pragma_weakalias:
+    ProhibitAttributes(Attrs);
+    HandlePragmaWeakAlias();
+    return StmtEmpty();
+
+  case tok::annot_pragma_redefine_extname:
+    ProhibitAttributes(Attrs);
+    HandlePragmaRedefineExtname();
+    return StmtEmpty();
+
   case tok::annot_pragma_fp_contract:
     ProhibitAttributes(Attrs);
     HandlePragmaFPContract();

clang/test/CodeGen/pragma-weak.c

@@ -157,6 +157,15 @@ void PR10878() { SHA384Pad(0); }
 // CHECK: call void @SHA384Pad(i8* null)
 
 
+// PR14046: Parse #pragma weak in function-local context
+extern int PR14046e(void);
+void PR14046f() {
+#pragma weak PR14046e
+  PR14046e();
+}
+// CHECK: declare extern_weak i32 @PR14046e()
+
+
 ///////////// TODO: stuff that still doesn't work
 
 // due to the fact that disparate TopLevelDecls cannot affect each other