libcpp/

        PR c/31924
        * expr.c (interpret_float_suffix): Check for invalid suffix.
gcc/testsuite/
        PR c/31924
        * gcc.dg/fltconst-1.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@124730 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 11 insertions, 8 deletions

diff --git a/libcpp/expr.c b/libcpp/expr.c
index a00614026c2..8401daee032 100644
--- a/libcpp/expr.c
+++ b/libcpp/expr.c
@@ -87,16 +87,19 @@ interpret_float_suffix (const uchar *s, size_t len)
   while (len--)
     switch (s[len])
       {
-      case 'f': case 'F': f++; break;
-      case 'l': case 'L': l++; break;
-      case 'i': case 'I':
-      case 'j': case 'J': i++; break;
-      case 'd': case 'D':
-	/* Disallow fd, ld suffixes.  */
-	if (d && (f || l))
+      case 'f': case 'F':
+	if (d > 0)
+	  return 0;
+	f++;
+	break;
+      case 'l': case 'L':
+	if (d > 0)
 	  return 0;
-	d++;
+	l++;
 	break;
+      case 'i': case 'I':
+      case 'j': case 'J': i++; break;
+      case 'd': case 'D': d++; break;
       default:
 	return 0;
       }