* c-common.c (c_common_init): Override cpplib's default

	warn_long_long setting.
	* c-lex.c (lex_number): Replace with interpret_integer,
	interpret_float, narrowest_unsigned_type and
	narrowest_signed_type, taking advantage of the new
	cpplib functionality.
	* cpperror.c (_cpp_begin_message): If a warning is turned
	into an error, avoid printing "warning:".
	* cppexp.c (cpp_num_sign_extend): New.
	* cppinit.c: Update comment.
	* cpplib.h (cpp_num_sign_extend): New.
	* tree.h: Update comment.
testsuite:
	* gcc.dg/wtr-int-type-1.c, gcc.dg/wtr-suffix-1.c,
	gcc.dg/cpp/paste4.c, gcc.dg/cpp/sysmac2.c:
	Update for mofified diagnostics.
	* gcc.dg/c99-intconst-1.c: No longer fail.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@54180 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 27 insertions, 0 deletions

diff --git a/gcc/cppexp.c b/gcc/cppexp.c
index 1153768dedd..e5f464eaa00 100644
--- a/gcc/cppexp.c
+++ b/gcc/cppexp.c
@@ -995,6 +995,33 @@ num_positive (num, precision)
   return (num.low & (cpp_num_part) 1 << (precision - 1)) == 0;
 }
 
+/* Sign extend a number, with PRECISION significant bits and all
+   others assumed clear, to fill out a cpp_num structure.  */
+cpp_num
+cpp_num_sign_extend (num, precision)
+     cpp_num num;
+     size_t precision;
+{
+  if (!num.unsignedp)
+    {
+      if (precision > PART_PRECISION)
+	{
+	  precision -= PART_PRECISION;
+	  if (precision < PART_PRECISION
+	      && (num.high & (cpp_num_part) 1 << (precision - 1)))
+	    num.high |= ~(~(cpp_num_part) 0 >> (PART_PRECISION - precision));
+	}
+      else if (num.low & (cpp_num_part) 1 << (precision - 1))
+	{
+	  if (precision < PART_PRECISION)
+	    num.low |= ~(~(cpp_num_part) 0 >> (PART_PRECISION - precision));
+	  num.high = ~(cpp_num_part) 0;
+	}
+    }
+
+  return num;
+}
+
 /* Returns the negative of NUM.  */
 static cpp_num
 num_negate (num, precision)