Dropped the parentheses for #pragma message and its kin in the -E output generator.

This was a suggestion by Jordan Rose since the documented format for these pragmas is without the parentheses.  At the same time, I've increased test coverage too for the preprocessed output.

llvm-svn: 179771

clang/lib/Frontend/PrintPreprocessedOutput.cpp

@@ -419,13 +419,13 @@ void PrintPPOutputPPCallbacks::PragmaMessage(SourceLocation Loc,
     OS << Namespace << ' ';
   switch (Kind) {
     case PMK_Message:
-      OS << "message(\"";
+      OS << "message \"";
       break;
     case PMK_Warning:
-      OS << "warning(\"";
+      OS << "warning \"";
       break;
     case PMK_Error:
-      OS << "error(\"";
+      OS << "error \"";
       break;
   }
 
@@ -440,8 +440,6 @@ void PrintPPOutputPPCallbacks::PragmaMessage(SourceLocation Loc,
          << (char)('0'+ ((Char >> 0) & 7));
   }
   OS << '"';
-
-  OS << ')';
   setEmittedDirectiveOnThisLine();
 }
 

clang/test/Lexer/pragma-message2.c

@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -E -Werror -verify %s 2>&1 | FileCheck %s
+
+#pragma message "\\test" // expected-warning {{\test}}
+// CHECK: #pragma message "\134test"
+
+#pragma message("\\test") // expected-warning {{\test}}
+// CHECK: #pragma message "\134test"
+
+#pragma GCC warning "\"" "te" "st" "\"" // expected-warning {{"test"}}
+// CHECK: #pragma GCC warning "\042test\042"
+
+#pragma GCC warning("\"" "te" "st" "\"") // expected-warning {{"test"}}
+// CHECK: #pragma GCC warning "\042test\042"
+
+#pragma GCC error "" "[	]" "" // expected-error {{[	]}}
+// CHECK: #pragma GCC error "[\011]"
+
+#pragma GCC error("" "[	]" "") // expected-error {{[	]}}
+// CHECK: #pragma GCC error "[\011]"

clang/test/Lexer/pragma-operators.cpp

@@ -32,6 +32,6 @@ B(foo)
 // CHECK: #pragma comment(lib, "libfoo")
 // CHECK: #pragma clang diagnostic ignored "-Wunused"
 // CHECK: #pragma clang diagnostic error "-Wunused"
-// CHECK: #pragma message("\042Hello\042, world!")
+// CHECK: #pragma message "\042Hello\042, world!"
 // CHECK: 0;
 int n = pragma_L pragma_u8 pragma_u pragma_U pragma_R pragma_UR pragma_hello 0;