* c-typeck.c (parser_build_binary_op): Condition warnings for

	X<=Y<=Z on -Wparentheses instead of -Wextra.
	* doc/invoke.texi: Update.  Document that most of -Wparentheses is
	supported for C only.

testsuite:
	* gcc.dg/Wparentheses-2.c, gcc.dg/Wparentheses-3.c,
	gcc.dg/Wparentheses-4.c, Wparentheses-5.c, Wparentheses-6.c,
	Wparentheses-7.c, Wparentheses-8.c, Wparentheses-9.c: New tests.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@84860 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 6 insertions, 5 deletions

diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c
index 2495550ed54..4befd126f08 100644
--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -2170,12 +2170,13 @@ parser_build_binary_op (enum tree_code code, tree arg1, tree arg2)
 	  if (TREE_CODE_CLASS (code1) == '<' || TREE_CODE_CLASS (code2) == '<')
 	    warning ("suggest parentheses around comparison in operand of &");
 	}
-    }
+      /* Similarly, check for cases like 1<=i<=10 that are probably errors.  */
+      if (TREE_CODE_CLASS (code) == '<'
+	  && (TREE_CODE_CLASS (code1) == '<'
+	      || TREE_CODE_CLASS (code2) == '<'))
+	warning ("comparisons like X<=Y<=Z do not have their mathematical meaning");
 
-  /* Similarly, check for cases like 1<=i<=10 that are probably errors.  */
-  if (TREE_CODE_CLASS (code) == '<' && extra_warnings
-      && (TREE_CODE_CLASS (code1) == '<' || TREE_CODE_CLASS (code2) == '<'))
-    warning ("comparisons like X<=Y<=Z do not have their mathematical meaning");
+    }
 
   unsigned_conversion_warning (result, arg1);
   unsigned_conversion_warning (result, arg2);