gcc: Add -flax-vector-conversions

Obtained from:	gcc 4.3 (rev. 120572, 120688; GPLv2)

13 files changed, 133 insertions, 53 deletions

diff --git a/contrib/gcc/ChangeLog.gcc43 b/contrib/gcc/ChangeLog.gcc43
index 5c6701a..8311fc9 100644
--- a/contrib/gcc/ChangeLog.gcc43
+++ b/contrib/gcc/ChangeLog.gcc43
@@ -389,6 +389,36 @@
 
 	* config.gcc: Support core2 processor.
 
+2007-01-11  Joseph Myers  <joseph@codesourcery.com> (r120688)
+
+	* c-common.c (vector_types_convertible_p): Treat opaque types as
+	always convertible if they have the same size, but not otherwise.
+
+2007-01-08  Mark Shinwell  <shinwell@codesourcery.com> (r120572)
+
+	* c.opt: Add -flax-vector-conversions.
+	* c-typeck.c (convert_for_assignment): Pass flag to
+	vector_types_convertible_p to allow emission of note.
+	(digest_init): Likewise.
+	* c-opts.c: Handle -flax-vector-conversions.
+	* c-common.c (flag_lax_vector_conversions): New.
+	(vector_types_convertible_p): Unless -flax-vector conversions
+	has been passed, disallow conversions between vectors with
+	differing numbers of subparts and/or element types.  If such
+	a conversion is disallowed, possibly emit a note on the first
+	occasion only to inform the user of -flax-vector-conversions.
+	The new last argument specifies this.
+	* c-common.h (flag_lax_vector_conversions): New.
+	(vector_types_convertible_p): Add extra argument.
+	* config/i386/i386.c (ix86_init_mmx_sse_builtins): Use
+	char_type_node for V*QI type vectors.
+	* config/rs6000/rs6000-c.c (altivec_overloaded_builtins):
+	Update to satisfy new typechecking rules.
+	* config/rs6000/altivec.h (vec_cmple): Use vec_cmpge, for both
+	C and C++ variants.
+	* doc/invoke.texi (C Dialect Options): Document
+	-flax-vector-conversions.
+
 2007-01-05  Manuel Lopez-Ibanez  <manu@gcc.gnu.org> (r120505)
 
 	PR c/19978
diff --git a/contrib/gcc/c-common.c b/contrib/gcc/c-common.c
index fa89614..d358a79 100644
--- a/contrib/gcc/c-common.c
+++ b/contrib/gcc/c-common.c
@@ -254,6 +254,10 @@ int flag_short_double;
 
 int flag_short_wchar;
 
+/* Nonzero means allow implicit conversions between vectors with
+   differing numbers of subparts and/or differing element types.  */
+int flag_lax_vector_conversions;
+
 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 int flag_ms_extensions;
 
@@ -1095,18 +1099,45 @@ constant_fits_type_p (tree c, tree type)
   return !TREE_OVERFLOW (c);
 }
 
-/* Nonzero if vector types T1 and T2 can be converted to each other
-   without an explicit cast.  */
-int
-vector_types_convertible_p (tree t1, tree t2)
-{
-  return targetm.vector_opaque_p (t1)
-	 || targetm.vector_opaque_p (t2)
-	 || (tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))
-	     && (TREE_CODE (TREE_TYPE (t1)) != REAL_TYPE ||
-		 TYPE_PRECISION (t1) == TYPE_PRECISION (t2))
-	     && INTEGRAL_TYPE_P (TREE_TYPE (t1))
-		== INTEGRAL_TYPE_P (TREE_TYPE (t2)));
+
+/* True if vector types T1 and T2 can be converted to each other
+   without an explicit cast.  If EMIT_LAX_NOTE is true, and T1 and T2
+   can only be converted with -flax-vector-conversions yet that is not
+   in effect, emit a note telling the user about that option if such
+   a note has not previously been emitted.  */
+bool
+vector_types_convertible_p (tree t1, tree t2, bool emit_lax_note)
+{
+  static bool emitted_lax_note = false;
+  bool convertible_lax;
+
+  if ((targetm.vector_opaque_p (t1) || targetm.vector_opaque_p (t2))
+      && tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2)))
+    return true;
+
+  convertible_lax =
+    (tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))
+     && (TREE_CODE (TREE_TYPE (t1)) != REAL_TYPE ||
+	 TYPE_PRECISION (t1) == TYPE_PRECISION (t2))
+     && (INTEGRAL_TYPE_P (TREE_TYPE (t1))
+	 == INTEGRAL_TYPE_P (TREE_TYPE (t2))));
+
+  if (!convertible_lax || flag_lax_vector_conversions)
+    return convertible_lax;
+
+  if (TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2)
+      && comptypes (TREE_TYPE (t1), TREE_TYPE (t2)))
+    return true;
+
+  if (emit_lax_note && !emitted_lax_note)
+    {
+      emitted_lax_note = true;
+      inform ("use -flax-vector-conversions to permit "
+              "conversions between vectors with differing "
+              "element types or numbers of subparts");
+    }
+
+  return false;
 }
 
 /* Convert EXPR to TYPE, warning about conversion problems with constants.
diff --git a/contrib/gcc/c-common.h b/contrib/gcc/c-common.h
index 453a2d6..fb9ea9e 100644
--- a/contrib/gcc/c-common.h
+++ b/contrib/gcc/c-common.h
@@ -389,6 +389,10 @@ extern int flag_short_double;
 
 extern int flag_short_wchar;
 
+/* Nonzero means allow implicit conversions between vectors with
+   differing numbers of subparts and/or differing element types.  */
+extern int flag_lax_vector_conversions;
+
 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 extern int flag_ms_extensions;
 
@@ -791,7 +795,7 @@ extern tree finish_label_address_expr (tree);
 extern tree lookup_label (tree);
 extern tree lookup_name (tree);
 
-extern int vector_types_convertible_p (tree t1, tree t2);
+extern bool vector_types_convertible_p (tree t1, tree t2, bool emit_lax_note);
 
 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
 
diff --git a/contrib/gcc/c-opts.c b/contrib/gcc/c-opts.c
index 0c584eb..ed6b771 100644
--- a/contrib/gcc/c-opts.c
+++ b/contrib/gcc/c-opts.c
@@ -710,6 +710,10 @@ c_common_handle_option (size_t scode, const char *arg, int value)
       flag_implicit_templates = value;
       break;
 
+    case OPT_flax_vector_conversions:
+      flag_lax_vector_conversions = value;
+      break;
+
     case OPT_fms_extensions:
       flag_ms_extensions = value;
       break;
diff --git a/contrib/gcc/c-typeck.c b/contrib/gcc/c-typeck.c
index dd0fdc5..3e47837 100644
--- a/contrib/gcc/c-typeck.c
+++ b/contrib/gcc/c-typeck.c
@@ -3893,7 +3893,7 @@ convert_for_assignment (tree type, tree rhs, enum impl_conv errtype,
     }
   /* Some types can interconvert without explicit casts.  */
   else if (codel == VECTOR_TYPE && coder == VECTOR_TYPE
-	   && vector_types_convertible_p (type, TREE_TYPE (rhs)))
+	   && vector_types_convertible_p (type, TREE_TYPE (rhs), true))
     return convert (type, rhs);
   /* Arithmetic types all interconvert, and enum is treated like int.  */
   else if ((codel == INTEGER_TYPE || codel == REAL_TYPE
@@ -4629,7 +4629,7 @@ digest_init (tree type, tree init, bool strict_string, int require_constant)
      below and handle as a constructor.  */
   if (code == VECTOR_TYPE
       && TREE_CODE (TREE_TYPE (inside_init)) == VECTOR_TYPE
-      && vector_types_convertible_p (TREE_TYPE (inside_init), type)
+      && vector_types_convertible_p (TREE_TYPE (inside_init), type, true)
       && TREE_CONSTANT (inside_init))
     {
       if (TREE_CODE (inside_init) == VECTOR_CST
diff --git a/contrib/gcc/c.opt b/contrib/gcc/c.opt
index 80b5312..8a920c5 100644
--- a/contrib/gcc/c.opt
+++ b/contrib/gcc/c.opt
@@ -584,6 +584,10 @@ Inject friend functions into enclosing namespace
 flabels-ok
 C++ ObjC++
 
+flax-vector-conversions
+C ObjC C++ ObjC++
+Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
+
 fms-extensions
 C ObjC C++ ObjC++
 Don't warn about uses of Microsoft extensions
diff --git a/contrib/gcc/config/i386/i386.c b/contrib/gcc/config/i386/i386.c
index 51bd93c..88f2836 100644
--- a/contrib/gcc/config/i386/i386.c
+++ b/contrib/gcc/config/i386/i386.c
@@ -15408,7 +15408,7 @@ ix86_init_mmx_sse_builtins (void)
   const struct builtin_description * d;
   size_t i;
 
-  tree V16QI_type_node = build_vector_type_for_mode (intQI_type_node, V16QImode);
+  tree V16QI_type_node = build_vector_type_for_mode (char_type_node, V16QImode);
   tree V2SI_type_node = build_vector_type_for_mode (intSI_type_node, V2SImode);
   tree V2SF_type_node = build_vector_type_for_mode (float_type_node, V2SFmode);
   tree V2DI_type_node
@@ -15417,7 +15417,7 @@ ix86_init_mmx_sse_builtins (void)
   tree V4SF_type_node = build_vector_type_for_mode (float_type_node, V4SFmode);
   tree V4SI_type_node = build_vector_type_for_mode (intSI_type_node, V4SImode);
   tree V4HI_type_node = build_vector_type_for_mode (intHI_type_node, V4HImode);
-  tree V8QI_type_node = build_vector_type_for_mode (intQI_type_node, V8QImode);
+  tree V8QI_type_node = build_vector_type_for_mode (char_type_node, V8QImode);
   tree V8HI_type_node = build_vector_type_for_mode (intHI_type_node, V8HImode);
 
   tree pchar_type_node = build_pointer_type (char_type_node);
diff --git a/contrib/gcc/config/rs6000/altivec.h b/contrib/gcc/config/rs6000/altivec.h
index dacb6d0..dc9cb83 100644
--- a/contrib/gcc/config/rs6000/altivec.h
+++ b/contrib/gcc/config/rs6000/altivec.h
@@ -332,7 +332,7 @@ NAME (T a1, U a2) \
 __altivec_binary_pred(vec_cmplt,
   __builtin_vec_cmpgt (a2, a1))
 __altivec_binary_pred(vec_cmple,
-  __builtin_altivec_cmpge (a2, a1))
+  __builtin_vec_cmpge (a2, a1))
 
 __altivec_scalar_pred(vec_all_in,
   __builtin_altivec_vcmpbfp_p (__CR6_EQ, a1, a2))
@@ -402,7 +402,7 @@ __altivec_scalar_pred(vec_any_nle,
 #undef __altivec_binary_pred
 #else
 #define vec_cmplt(a1, a2) __builtin_vec_cmpgt ((a2), (a1))
-#define vec_cmple(a1, a2) __builtin_altivec_vcmpgefp ((a2), (a1))
+#define vec_cmple(a1, a2) __builtin_vec_cmpge ((a2), (a1))
 
 #define vec_all_in(a1, a2) __builtin_altivec_vcmpbfp_p (__CR6_EQ, (a1), (a2))
 #define vec_any_out(a1, a2) __builtin_altivec_vcmpbfp_p (__CR6_EQ_REV, (a1), (a2))
diff --git a/contrib/gcc/config/rs6000/rs6000-c.c b/contrib/gcc/config/rs6000/rs6000-c.c
index 5c6abd10..5be9cf3 100644
--- a/contrib/gcc/config/rs6000/rs6000-c.c
+++ b/contrib/gcc/config/rs6000/rs6000-c.c
@@ -222,17 +222,17 @@ const struct altivec_builtin_types altivec_overloaded_builtins[] = {
   { ALTIVEC_BUILTIN_VEC_UNPACKH, ALTIVEC_BUILTIN_VUPKHSB,
     RS6000_BTI_V8HI, RS6000_BTI_V16QI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_UNPACKH, ALTIVEC_BUILTIN_VUPKHSB,
-    RS6000_BTI_V8HI, RS6000_BTI_bool_V16QI, 0, 0 },
+    RS6000_BTI_bool_V8HI, RS6000_BTI_bool_V16QI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_UNPACKH, ALTIVEC_BUILTIN_VUPKHSH,
     RS6000_BTI_V4SI, RS6000_BTI_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_UNPACKH, ALTIVEC_BUILTIN_VUPKHSH,
-    RS6000_BTI_V4SI, RS6000_BTI_bool_V8HI, 0, 0 },
+    RS6000_BTI_bool_V4SI, RS6000_BTI_bool_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_UNPACKH, ALTIVEC_BUILTIN_VUPKHPX,
     RS6000_BTI_unsigned_V4SI, RS6000_BTI_pixel_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_VUPKHSH, ALTIVEC_BUILTIN_VUPKHSH,
     RS6000_BTI_V4SI, RS6000_BTI_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_VUPKHSH, ALTIVEC_BUILTIN_VUPKHSH,
-    RS6000_BTI_V4SI, RS6000_BTI_bool_V8HI, 0, 0 },
+    RS6000_BTI_bool_V4SI, RS6000_BTI_bool_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_VUPKHPX, ALTIVEC_BUILTIN_VUPKHPX,
     RS6000_BTI_unsigned_V4SI, RS6000_BTI_unsigned_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_VUPKHPX, ALTIVEC_BUILTIN_VUPKHPX,
@@ -240,17 +240,17 @@ const struct altivec_builtin_types altivec_overloaded_builtins[] = {
   { ALTIVEC_BUILTIN_VEC_VUPKHSB, ALTIVEC_BUILTIN_VUPKHSB,
     RS6000_BTI_V8HI, RS6000_BTI_V16QI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_VUPKHSB, ALTIVEC_BUILTIN_VUPKHSB,
-    RS6000_BTI_V8HI, RS6000_BTI_bool_V16QI, 0, 0 },
+    RS6000_BTI_bool_V8HI, RS6000_BTI_bool_V16QI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_UNPACKL, ALTIVEC_BUILTIN_VUPKLSB,
     RS6000_BTI_V8HI, RS6000_BTI_V16QI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_UNPACKL, ALTIVEC_BUILTIN_VUPKLSB,
-    RS6000_BTI_V8HI, RS6000_BTI_bool_V16QI, 0, 0 },
+    RS6000_BTI_bool_V8HI, RS6000_BTI_bool_V16QI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_UNPACKL, ALTIVEC_BUILTIN_VUPKLPX,
     RS6000_BTI_unsigned_V4SI, RS6000_BTI_pixel_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_UNPACKL, ALTIVEC_BUILTIN_VUPKLSH,
     RS6000_BTI_V4SI, RS6000_BTI_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_UNPACKL, ALTIVEC_BUILTIN_VUPKLSH,
-    RS6000_BTI_V4SI, RS6000_BTI_bool_V8HI, 0, 0 },
+    RS6000_BTI_bool_V4SI, RS6000_BTI_bool_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_VUPKLPX, ALTIVEC_BUILTIN_VUPKLPX,
     RS6000_BTI_unsigned_V4SI, RS6000_BTI_unsigned_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_VUPKLPX, ALTIVEC_BUILTIN_VUPKLPX,
@@ -258,11 +258,11 @@ const struct altivec_builtin_types altivec_overloaded_builtins[] = {
   { ALTIVEC_BUILTIN_VEC_VUPKLSH, ALTIVEC_BUILTIN_VUPKLSH,
     RS6000_BTI_V4SI, RS6000_BTI_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_VUPKLSH, ALTIVEC_BUILTIN_VUPKLSH,
-    RS6000_BTI_V4SI, RS6000_BTI_bool_V8HI, 0, 0 },
+    RS6000_BTI_bool_V4SI, RS6000_BTI_bool_V8HI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_VUPKLSB, ALTIVEC_BUILTIN_VUPKLSB,
     RS6000_BTI_V8HI, RS6000_BTI_V16QI, 0, 0 },
   { ALTIVEC_BUILTIN_VEC_VUPKLSB, ALTIVEC_BUILTIN_VUPKLSB,
-    RS6000_BTI_V8HI, RS6000_BTI_bool_V16QI, 0, 0 },
+    RS6000_BTI_bool_V8HI, RS6000_BTI_bool_V16QI, 0, 0 },
 
   /* Binary AltiVec builtins.  */
   { ALTIVEC_BUILTIN_VEC_ADD, ALTIVEC_BUILTIN_VADDUBM,
@@ -576,31 +576,23 @@ const struct altivec_builtin_types altivec_overloaded_builtins[] = {
   { ALTIVEC_BUILTIN_VEC_CMPEQ, ALTIVEC_BUILTIN_VCMPEQFP,
     RS6000_BTI_bool_V4SI, RS6000_BTI_V4SF, RS6000_BTI_V4SF, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPEQFP, ALTIVEC_BUILTIN_VCMPEQFP,
-    RS6000_BTI_V4SI, RS6000_BTI_V4SF, RS6000_BTI_V4SF, 0 },
-  { ALTIVEC_BUILTIN_VEC_VCMPEQUW, ALTIVEC_BUILTIN_VCMPEQUW,
-    RS6000_BTI_V4SI, RS6000_BTI_V4SI, RS6000_BTI_V4SI, 0 },
-  { ALTIVEC_BUILTIN_VEC_VCMPEQUW, ALTIVEC_BUILTIN_VCMPEQUW,
-    RS6000_BTI_V4SI, RS6000_BTI_unsigned_V4SI, RS6000_BTI_unsigned_V4SI, 0 },
+    RS6000_BTI_bool_V4SI, RS6000_BTI_V4SF, RS6000_BTI_V4SF, 0 },
+
   { ALTIVEC_BUILTIN_VEC_VCMPEQUW, ALTIVEC_BUILTIN_VCMPEQUW,
     RS6000_BTI_bool_V4SI, RS6000_BTI_V4SI, RS6000_BTI_V4SI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPEQUW, ALTIVEC_BUILTIN_VCMPEQUW,
     RS6000_BTI_bool_V4SI, RS6000_BTI_unsigned_V4SI, RS6000_BTI_unsigned_V4SI, 0 },
-  { ALTIVEC_BUILTIN_VEC_VCMPEQUH, ALTIVEC_BUILTIN_VCMPEQUH,
-    RS6000_BTI_V8HI, RS6000_BTI_V8HI, RS6000_BTI_V8HI, 0 },
-  { ALTIVEC_BUILTIN_VEC_VCMPEQUH, ALTIVEC_BUILTIN_VCMPEQUH,
-    RS6000_BTI_V8HI, RS6000_BTI_unsigned_V8HI, RS6000_BTI_unsigned_V8HI, 0 },
+
   { ALTIVEC_BUILTIN_VEC_VCMPEQUH, ALTIVEC_BUILTIN_VCMPEQUH,
     RS6000_BTI_bool_V8HI, RS6000_BTI_V8HI, RS6000_BTI_V8HI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPEQUH, ALTIVEC_BUILTIN_VCMPEQUH,
     RS6000_BTI_bool_V8HI, RS6000_BTI_unsigned_V8HI, RS6000_BTI_unsigned_V8HI, 0 },
-  { ALTIVEC_BUILTIN_VEC_VCMPEQUB, ALTIVEC_BUILTIN_VCMPEQUB,
-    RS6000_BTI_V16QI, RS6000_BTI_V16QI, RS6000_BTI_V16QI, 0 },
-  { ALTIVEC_BUILTIN_VEC_VCMPEQUB, ALTIVEC_BUILTIN_VCMPEQUB,
-    RS6000_BTI_V16QI, RS6000_BTI_unsigned_V16QI, RS6000_BTI_unsigned_V16QI, 0 },
+
   { ALTIVEC_BUILTIN_VEC_VCMPEQUB, ALTIVEC_BUILTIN_VCMPEQUB,
     RS6000_BTI_bool_V16QI, RS6000_BTI_V16QI, RS6000_BTI_V16QI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPEQUB, ALTIVEC_BUILTIN_VCMPEQUB,
     RS6000_BTI_bool_V16QI, RS6000_BTI_unsigned_V16QI, RS6000_BTI_unsigned_V16QI, 0 },
+
   { ALTIVEC_BUILTIN_VEC_CMPGE, ALTIVEC_BUILTIN_VCMPGEFP,
     RS6000_BTI_bool_V4SI, RS6000_BTI_V4SF, RS6000_BTI_V4SF, 0 },
   { ALTIVEC_BUILTIN_VEC_CMPGT, ALTIVEC_BUILTIN_VCMPGTUB,
@@ -618,29 +610,29 @@ const struct altivec_builtin_types altivec_overloaded_builtins[] = {
   { ALTIVEC_BUILTIN_VEC_CMPGT, ALTIVEC_BUILTIN_VCMPGTFP,
     RS6000_BTI_bool_V4SI, RS6000_BTI_V4SF, RS6000_BTI_V4SF, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTFP, ALTIVEC_BUILTIN_VCMPGTFP,
-    RS6000_BTI_V4SI, RS6000_BTI_V4SF, RS6000_BTI_V4SF, 0 },
+    RS6000_BTI_bool_V4SI, RS6000_BTI_V4SF, RS6000_BTI_V4SF, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTSW, ALTIVEC_BUILTIN_VCMPGTSW,
-    RS6000_BTI_V4SI, RS6000_BTI_V4SI, RS6000_BTI_V4SI, 0 },
+    RS6000_BTI_bool_V4SI, RS6000_BTI_V4SI, RS6000_BTI_V4SI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTSW, ALTIVEC_BUILTIN_VCMPGTSW,
     RS6000_BTI_bool_V4SI, RS6000_BTI_V4SI, RS6000_BTI_V4SI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTUW, ALTIVEC_BUILTIN_VCMPGTUW,
-    RS6000_BTI_V4SI, RS6000_BTI_unsigned_V4SI, RS6000_BTI_unsigned_V4SI, 0 },
+    RS6000_BTI_bool_V4SI, RS6000_BTI_unsigned_V4SI, RS6000_BTI_unsigned_V4SI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTUW, ALTIVEC_BUILTIN_VCMPGTUW,
     RS6000_BTI_bool_V4SI, RS6000_BTI_unsigned_V4SI, RS6000_BTI_unsigned_V4SI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTSH, ALTIVEC_BUILTIN_VCMPGTSH,
-    RS6000_BTI_V8HI, RS6000_BTI_V8HI, RS6000_BTI_V8HI, 0 },
+    RS6000_BTI_bool_V8HI, RS6000_BTI_V8HI, RS6000_BTI_V8HI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTSH, ALTIVEC_BUILTIN_VCMPGTSH,
     RS6000_BTI_bool_V8HI, RS6000_BTI_V8HI, RS6000_BTI_V8HI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTUH, ALTIVEC_BUILTIN_VCMPGTUH,
-    RS6000_BTI_V8HI, RS6000_BTI_unsigned_V8HI, RS6000_BTI_unsigned_V8HI, 0 },
+    RS6000_BTI_bool_V8HI, RS6000_BTI_unsigned_V8HI, RS6000_BTI_unsigned_V8HI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTUH, ALTIVEC_BUILTIN_VCMPGTUH,
     RS6000_BTI_bool_V8HI, RS6000_BTI_unsigned_V8HI, RS6000_BTI_unsigned_V8HI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTSB, ALTIVEC_BUILTIN_VCMPGTSB,
-    RS6000_BTI_V16QI, RS6000_BTI_V16QI, RS6000_BTI_V16QI, 0 },
+    RS6000_BTI_bool_V16QI, RS6000_BTI_V16QI, RS6000_BTI_V16QI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTSB, ALTIVEC_BUILTIN_VCMPGTSB,
     RS6000_BTI_bool_V16QI, RS6000_BTI_V16QI, RS6000_BTI_V16QI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTUB, ALTIVEC_BUILTIN_VCMPGTUB,
-    RS6000_BTI_V16QI, RS6000_BTI_unsigned_V16QI, RS6000_BTI_unsigned_V16QI, 0 },
+    RS6000_BTI_bool_V16QI, RS6000_BTI_unsigned_V16QI, RS6000_BTI_unsigned_V16QI, 0 },
   { ALTIVEC_BUILTIN_VEC_VCMPGTUB, ALTIVEC_BUILTIN_VCMPGTUB,
     RS6000_BTI_bool_V16QI, RS6000_BTI_unsigned_V16QI, RS6000_BTI_unsigned_V16QI, 0 },
   { ALTIVEC_BUILTIN_VEC_CMPLE, ALTIVEC_BUILTIN_VCMPGEFP,
diff --git a/contrib/gcc/cp/ChangeLog.gcc43 b/contrib/gcc/cp/ChangeLog.gcc43
index 701bea8..24e79ee 100644
--- a/contrib/gcc/cp/ChangeLog.gcc43
+++ b/contrib/gcc/cp/ChangeLog.gcc43
@@ -29,14 +29,23 @@
 
 	* decl.c (compute_array_index_type): New warning flag warn_vla.
 
-2007-01-07  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>
+2007-01-08  Mark Shinwell  <shinwell@codesourcery.com> (r120572)
+
+	* call.c (standard_conversion): Pass flag to
+	vector_types_convertible_p to disallow emission of note.
+	* typeck.c (convert_for_assignment): Pass flag to
+	vector_types_convertible_p to allow emission of note.
+	(ptr_reasonably_similar): Pass flag to vector_types_convertible_p
+	to disallow emission of note.
+
+2007-01-07  Manuel Lopez-Ibanez  <manu@gcc.gnu.org> (r120558)
 
 	PR c++/28986
 	* typeck.c (build_binary_op): Call overflow_warning if
 	TREE_OVERFLOW_P is true for the result and not for any of the
 	operands.
 	
-2007-01-05  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>
+2007-01-05  Manuel Lopez-Ibanez  <manu@gcc.gnu.org> (r120505)
 
 	PR c/19978
 	* semantics.c (finish_unary_op_expr): Warn only if result
diff --git a/contrib/gcc/cp/call.c b/contrib/gcc/cp/call.c
index 848f3c8..24b5d1f 100644
--- a/contrib/gcc/cp/call.c
+++ b/contrib/gcc/cp/call.c
@@ -838,7 +838,7 @@ standard_conversion (tree to, tree from, tree expr, bool c_cast_p,
 	conv->rank = cr_promotion;
     }
   else if (fcode == VECTOR_TYPE && tcode == VECTOR_TYPE
-	   && vector_types_convertible_p (from, to))
+	   && vector_types_convertible_p (from, to, false))
     return build_conv (ck_std, to, conv);
   else if (!(flags & LOOKUP_CONSTRUCTOR_CALLABLE)
 	   && IS_AGGR_TYPE (to) && IS_AGGR_TYPE (from)
diff --git a/contrib/gcc/cp/typeck.c b/contrib/gcc/cp/typeck.c
index 5325989..d0334dd 100644
--- a/contrib/gcc/cp/typeck.c
+++ b/contrib/gcc/cp/typeck.c
@@ -6229,7 +6229,7 @@ convert_for_assignment (tree type, tree rhs,
   coder = TREE_CODE (rhstype);
 
   if (TREE_CODE (type) == VECTOR_TYPE && coder == VECTOR_TYPE
-      && vector_types_convertible_p (type, rhstype))
+      && vector_types_convertible_p (type, rhstype, true))
     return convert (type, rhs);
 
   if (rhs == error_mark_node || rhstype == error_mark_node)
@@ -6799,7 +6799,7 @@ ptr_reasonably_similar (tree to, tree from)
 	continue;
 
       if (TREE_CODE (to) == VECTOR_TYPE
-	  && vector_types_convertible_p (to, from))
+	  && vector_types_convertible_p (to, from, false))
 	return 1;
 
       if (TREE_CODE (to) == INTEGER_TYPE
diff --git a/contrib/gcc/doc/invoke.texi b/contrib/gcc/doc/invoke.texi
index 51ac30f..24bf752 100644
--- a/contrib/gcc/doc/invoke.texi
+++ b/contrib/gcc/doc/invoke.texi
@@ -167,7 +167,7 @@ in the following sections.
 -fno-asm  -fno-builtin  -fno-builtin-@var{function} @gol
 -fhosted  -ffreestanding -fopenmp -fms-extensions @gol
 -trigraphs  -no-integrated-cpp  -traditional  -traditional-cpp @gol
--fallow-single-precision  -fcond-mismatch @gol
+-fallow-single-precision  -fcond-mismatch -flax-vector-conversions @gol
 -fsigned-bitfields  -fsigned-char @gol
 -funsigned-bitfields  -funsigned-char}
 
@@ -1337,6 +1337,12 @@ Allow conditional expressions with mismatched types in the second and
 third arguments.  The value of such an expression is void.  This option
 is not supported for C++.
 
+@item -flax-vector-conversions
+@opindex flax-vector-conversions
+Allow implicit conversions between vectors with differing numbers of
+elements and/or incompatible element types.  This option should not be
+used for new code.
+
 @item -funsigned-char
 @opindex funsigned-char
 Let the type @code{char} be unsigned, like @code{unsigned char}.