MFC r258081, r258138, r258143, r258179, r258157, r258204, 258205,

	r258206, r258207, r258321

This is a series of commits inspired on Google's gcc-4.2.1 for
Android that were taken from the gcc pre-4.3 under the GPLv2.

gcc: Backport fixes for -W parentheses in C++
	This fixes GCC 19564.
gcc: merge rs6000 change from FSF pre-gcc43
	Don't set MASK_PPC_GFXOPT for 8540 or 8548.
Merge vrp-tree fix from gcc-4.3
	Fix missed conversion from / to >> (GCC PR32521)
Merge in GCCr120505 to include definition of TREE_OVERFLOW_P
gcc: warn about integer overflow in constant expressions in the C++ frontend.
gcc: Add a new option -Wvla to warn variable length array.
libcpp: preprocessor speedup patches from upstream gcc.
gcc: add femit-struct-debug support to reduce Reduce dwarf debug size
gcc: Fix postreload-gcse treatment of call-clobbered registers.
gcc: Record some previous commits in the ChangeLog.gcc43 file.

1 files changed, 10 insertions, 0 deletions

diff --git a/contrib/gcc/cp/semantics.c b/contrib/gcc/cp/semantics.c
index 9c37b36..ee16e75 100644
--- a/contrib/gcc/cp/semantics.c
+++ b/contrib/gcc/cp/semantics.c
@@ -587,6 +587,16 @@ maybe_convert_cond (tree cond)
 
   /* Do the conversion.  */
   cond = convert_from_reference (cond);
+
+  if (TREE_CODE (cond) == MODIFY_EXPR
+      && !TREE_NO_WARNING (cond)
+      && warn_parentheses)
+    {
+      warning (OPT_Wparentheses,
+	       "suggest parentheses around assignment used as truth value");
+      TREE_NO_WARNING (cond) = 1;
+    }
+
   return condition_conversion (cond);
 }