Ensure we diagnose long long literals in C90 mode.

llvm-svn: 41581

clang/Lex/PPExpressions.cpp

@@ -167,6 +167,11 @@ static bool EvaluateValue(llvm::APSInt &Result, Token &PeekTok,
     }
     assert(Literal.isIntegerLiteral() && "Unknown ppnumber");
 
+    // long long is a C99 feature.
+    if (!PP.getLangOptions().C99 && !PP.getLangOptions().CPlusPlus0x
+	&& Literal.isLongLong)
+      PP.Diag(PeekTok, diag::ext_longlong);
+
     // Parse the integer literal into Result.
     if (Literal.GetIntegerValue(Result)) {
       // Overflow parsing integer literal.

clang/Sema/SemaExpr.cpp

@@ -156,6 +156,11 @@ Action::ExprResult Sema::ParseNumericConstant(const Token &Tok) {
   } else {
     QualType t;
 
+    // long long is a C99 feature.
+    if (!getLangOptions().C99 && !getLangOptions().CPlusPlus0x &&
+	Literal.isLongLong)
+      Diag(Tok.getLocation(), diag::ext_longlong);
+
     // Get the value in the widest-possible width.
     llvm::APInt ResultVal(Context.Target.getIntMaxTWidth(Tok.getLocation()), 0);
    

clang/test/Sema/c89.c

@@ -24,3 +24,8 @@ long long test2;   /* expected-warning {{extension}} */
 void test3(int i) {
   int A[i];        /* expected-warning {{variable length array}} */
 }
+
+int test4 = 0LL;		/* expected-warning {{long long}} */
+
+#if 1LL				/* expected-warning {{long long}} */
+#endif