cppbuiltin.c (define_builtin_macros_for_type_sizes): Define __FLOAT_WORD_ORDER__ according to FLOAT_WORDS_BIG_ENDIAN.

gcc/
	* cppbuiltin.c (define_builtin_macros_for_type_sizes): Define
	__FLOAT_WORD_ORDER__ according to FLOAT_WORDS_BIG_ENDIAN.
	* config/dfp-bit.h (LIBGCC2_FLOAT_WORDS_BIG_ENDIAN): Delete.
	* doc/cpp.texi (__FLOAT_WORD_ORDER__): Document.
	* system.h (LIBGCC2_FLOAT_WORDS_BIG_ENDIAN): Poison.

libgcc/
	* config/libbid/bid_conf.h (BID_BIG_ENDIAN): Define in terms of
	__FLOAT_WORD_ORDER__.
	* config/libbid/bid_gcc_intrinsics.h (LIBGCC2_FLOAT_WORDS_BIG_ENDIAN):
	Delete.

libdecnumber/
	* dconfig.h (LIBGCC2_FLOAT_WORDS_BIG_ENDIAN): Delete.
	(WORDS_BIG_ENDIAN): Define based on value of __FLOAT_WORD_ORDER__.

From-SVN: r167129

28 files changed, 133 insertions, 31 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ec3b96f..85ff5a9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2010-11-24  Nathan Froyd  <froydnj@codesourcery.com>
+
+	* cppbuiltin.c (define_builtin_macros_for_type_sizes): Define
+	__FLOAT_WORD_ORDER__ according to FLOAT_WORDS_BIG_ENDIAN.
+	* config/dfp-bit.h (LIBGCC2_FLOAT_WORDS_BIG_ENDIAN): Delete.
+	* doc/cpp.texi (__FLOAT_WORD_ORDER__): Document.
+	* system.h (LIBGCC2_FLOAT_WORDS_BIG_ENDIAN): Poison.
+
 2010-11-24  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/46519
diff --git a/gcc/config/dfp-bit.h b/gcc/config/dfp-bit.h
index 20688b1..c1ee377 100644
--- a/gcc/config/dfp-bit.h
+++ b/gcc/config/dfp-bit.h
@@ -33,11 +33,6 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "coretypes.h"
 #include "tm.h"
 
-#ifndef LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
-#define LIBGCC2_FLOAT_WORDS_BIG_ENDIAN \
-  (__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__)
-#endif
-
 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
 #endif
diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h
index 67f4f93..a323501 100644
--- a/gcc/cp/cp-tree.h
+++ b/gcc/cp/cp-tree.h
@@ -5639,6 +5639,9 @@ extern tree cxx_omp_clause_dtor			(tree, tree);
 extern void cxx_omp_finish_clause		(tree);
 extern bool cxx_omp_privatize_by_reference	(const_tree);
 
+/* in name-lookup.c */
+extern void suggest_alternatives_for (tree);
+
 /* -- end of C++ */
 
 #endif /* ! GCC_CP_TREE_H */
diff --git a/gcc/cp/error.c b/gcc/cp/error.c
index 1560fc6..de45efe 100644
--- a/gcc/cp/error.c
+++ b/gcc/cp/error.c
@@ -1700,6 +1700,7 @@ dump_expr (tree t, int flags)
     case NAMESPACE_DECL:
     case LABEL_DECL:
     case OVERLOAD:
+    case TYPE_DECL:
     case IDENTIFIER_NODE:
       dump_decl (t, (flags & ~TFF_DECL_SPECIFIERS) | TFF_NO_FUNCTION_ARGUMENTS);
       break;
diff --git a/gcc/cp/lex.c b/gcc/cp/lex.c
index c583d7d..9c6be41 100644
--- a/gcc/cp/lex.c
+++ b/gcc/cp/lex.c
@@ -450,7 +450,10 @@ unqualified_name_lookup_error (tree name)
   else
     {
       if (!objc_diagnose_private_ivar (name))
-        error ("%qD was not declared in this scope", name);
+	{
+	  error ("%qD was not declared in this scope", name);
+	  suggest_alternatives_for (name);
+	}
       /* Prevent repeated error messages by creating a VAR_DECL with
 	 this NAME in the innermost block scope.  */
       if (current_function_decl)
diff --git a/gcc/cp/name-lookup.c b/gcc/cp/name-lookup.c
index dc73544..0ee80e4 100644
--- a/gcc/cp/name-lookup.c
+++ b/gcc/cp/name-lookup.c
@@ -30,8 +30,10 @@ along with GCC; see the file COPYING3.  If not see
 #include "timevar.h"
 #include "toplev.h"
 #include "diagnostic-core.h"
+#include "intl.h"
 #include "debug.h"
 #include "c-family/c-pragma.h"
+#include "params.h"
 
 /* The bindings for a particular name in a particular scope.  */
 
@@ -3917,6 +3919,73 @@ remove_hidden_names (tree fns)
   return fns;
 }
 
+/* Suggest alternatives for NAME, an IDENTIFIER_NODE for which name
+   lookup failed.  Search through all available namespaces and print out
+   possible candidates.  */
+
+void
+suggest_alternatives_for (tree name)
+{
+  VEC(tree,heap) *candidates = NULL;
+  VEC(tree,heap) *namespaces_to_search = NULL;
+  int max_to_search = PARAM_VALUE (CXX_MAX_NAMESPACES_FOR_DIAGNOSTIC_HELP);
+  int n_searched = 0;
+  char *spaces;
+  const char *str;
+  tree t;
+  unsigned ix;
+
+  VEC_safe_push (tree, heap, namespaces_to_search, global_namespace);
+
+  while (!VEC_empty (tree, namespaces_to_search)
+	 && n_searched < max_to_search)
+    {
+      tree scope = VEC_pop (tree, namespaces_to_search);
+      struct scope_binding binding = EMPTY_SCOPE_BINDING;
+      struct cp_binding_level *level = NAMESPACE_LEVEL (scope);
+
+      /* Look in this namespace.  */
+      qualified_lookup_using_namespace (name, scope, &binding, 0);
+
+      n_searched++;
+
+      if (binding.value)
+	VEC_safe_push (tree, heap, candidates, binding.value);
+
+      /* Add child namespaces.  */
+      for (t = level->namespaces; t; t = DECL_CHAIN (t))
+	VEC_safe_push (tree, heap, namespaces_to_search, t);
+    }
+
+  /* If we stopped before we could examine all namespaces, inform the
+     user.  Do this even if we don't have any candidates, since there
+     might be more candidates further down that we weren't able to
+     find.  */
+  if (n_searched >= max_to_search)
+    inform (input_location,
+	    "maximum limit of %d namespaces searched for %qE",
+	    max_to_search, name);
+
+  /* Nothing useful to report.  */
+  if (VEC_empty (tree, candidates))
+    return;
+
+  str = (VEC_length(tree, candidates) > 1
+	 ? _("suggested alternatives:")
+	 : _("suggested alternative:"));
+  spaces = NULL;
+
+  FOR_EACH_VEC_ELT (tree, candidates, ix, t)
+    {
+      inform (input_location, "%s %qE", (spaces ? spaces : str), t);
+      spaces = spaces ? spaces : get_spaces (str);
+    }
+
+  VEC_free (tree, heap, candidates);
+  VEC_free (tree, heap, namespaces_to_search);
+  free (spaces);
+}
+
 /* Unscoped lookup of a global: iterate over current namespaces,
    considering using-directives.  */
 
diff --git a/gcc/cppbuiltin.c b/gcc/cppbuiltin.c
index ffee4c0..ee00de5 100644
--- a/gcc/cppbuiltin.c
+++ b/gcc/cppbuiltin.c
@@ -157,6 +157,11 @@ define_builtin_macros_for_type_sizes (cpp_reader *pfile)
       cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__");
     }
 
+  cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s",
+                        (FLOAT_WORDS_BIG_ENDIAN
+                         ? "__ORDER_BIG_ENDIAN__"
+                         : "__ORDER_LITTLE_ENDIAN__"));
+
   /* ptr_type_node can't be used here since ptr_mode is only set when
      toplev calls backend_init which is not done with -E switch.  */
   cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d",
diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi
index ddcf814..7d78d12 100644
--- a/gcc/doc/cpp.texi
+++ b/gcc/doc/cpp.texi
@@ -2289,6 +2289,11 @@ You should use these macros for testing like this:
 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 @end smallexample
 
+@item __FLOAT_WORD_ORDER__
+@code{__FLOAT_WORD_ORDER__} is defined to one of the values
+@code{__ORDER_LITTLE_ENDIAN__} or @code{__ORDER_BIG_ENDIAN__} to reflect
+the layout of the words of multi-word floating-point quantities.
+
 @item __DEPRECATED
 This macro is defined, with value 1, when compiling a C++ source file
 with warnings about deprecated constructs enabled.  These warnings are
diff --git a/gcc/lto/lto.c b/gcc/lto/lto.c
index 3db5ac1..fcb66ce 100644
--- a/gcc/lto/lto.c
+++ b/gcc/lto/lto.c
@@ -1932,7 +1932,6 @@ lto_fixup_tree (tree *tp, int *walk_subtrees, void *data)
 	{
 	  /* walk_tree only handles TREE_OPERANDs. Do the rest here.  */
 	  lto_fixup_common (t, data);
-	  LTO_FIXUP_SUBTREE (t->exp.block);
 	  *walk_subtrees = 1;
 	}
       else
diff --git a/gcc/params.def b/gcc/params.def
index 6b6e0550..2ea0013 100644
--- a/gcc/params.def
+++ b/gcc/params.def
@@ -855,6 +855,15 @@ DEFPARAM (MIN_PARTITION_SIZE,
 	  "lto-min-partition",
 	  "Size of minimal paritition for WHOPR (in estimated instructions)",
 	  1000, 0, 0)
+
+/* Diagnostic parameters.  */
+
+DEFPARAM (CXX_MAX_NAMESPACES_FOR_DIAGNOSTIC_HELP,
+	  "cxx-max-namespaces-for-diagnostic-help",
+	  "Maximum number of namespaces to search for alternatives when "
+	  "name lookup fails",
+	  1000, 0, 0)
+
 /*
 Local variables:
 mode:c
diff --git a/gcc/reload1.c b/gcc/reload1.c
index da354a7..2f02ae3 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -6600,17 +6600,6 @@ choose_reload_regs (struct insn_chain *chain)
 	      && (rld[r].nregs == max_group_size
 		  || ! reg_classes_intersect_p (rld[r].rclass, group_class)))
 	    search_equiv = rld[r].in;
-	  /* If this is an output reload from a simple move insn, look
-	     if an equivalence for the input is available.  */
-	  else if (inheritance && rld[r].in == 0 && rld[r].out != 0)
-	    {
-	      rtx set = single_set (insn);
-
-	      if (set
-		  && rtx_equal_p (rld[r].out, SET_DEST (set))
-		  && CONSTANT_P (SET_SRC (set)))
-		search_equiv = SET_SRC (set);
-	    }
 
 	  if (search_equiv)
 	    {
diff --git a/gcc/system.h b/gcc/system.h
index 4de117e..fbeab0f 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -800,7 +800,8 @@ extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 	TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION
 
 /* Hooks into libgcc2.  */
- #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN
+ #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
+   LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
 
 /* Miscellaneous macros that are no longer used.  */
  #pragma GCC poison USE_MAPPED_LOCATION
diff --git a/gcc/testsuite/g++.dg/ext/builtin3.C b/gcc/testsuite/g++.dg/ext/builtin3.C
index 3d06dd7..a9ebce0 100644
--- a/gcc/testsuite/g++.dg/ext/builtin3.C
+++ b/gcc/testsuite/g++.dg/ext/builtin3.C
@@ -10,4 +10,5 @@ extern "C" int printf(char*, ...);
 
 void foo() {
   printf("abc"); 		// { dg-error "not declared" }
+  // { dg-message "note" "suggested alternative" { target *-*-* } 12 }
 }
diff --git a/gcc/testsuite/g++.dg/lookup/error1.C b/gcc/testsuite/g++.dg/lookup/error1.C
index 2264b23..3b34ee3 100644
--- a/gcc/testsuite/g++.dg/lookup/error1.C
+++ b/gcc/testsuite/g++.dg/lookup/error1.C
@@ -4,6 +4,7 @@
 
 namespace N { int i; }
 void foo() { i; }   // { dg-error "not declared" }
+  // { dg-message "note" "suggested alternative" { target *-*-* } 6 }
 
 using namespace N;
 void bar() { i; }
diff --git a/gcc/testsuite/g++.dg/lookup/koenig5.C b/gcc/testsuite/g++.dg/lookup/koenig5.C
index 6ecc25d..bc1dc8c 100644
--- a/gcc/testsuite/g++.dg/lookup/koenig5.C
+++ b/gcc/testsuite/g++.dg/lookup/koenig5.C
@@ -32,10 +32,12 @@ void g (N::A *a, M::B *b, O::C *c)
   One (a); // ok
   One (a, b); // ok
   One (b); // { dg-error "not declared" }
+  // { dg-message "note" "suggested alternative" { target *-*-* } 34 }
 
   Two (c); // ok
   Two (a, c); // ok
   Two (a); // { dg-error "not declared" }
+  // { dg-message "note" "suggested alternative" { target *-*-* } 39 }
   Two (a, a); // error masked by earlier error
   Two (b); // error masked by earlier error
   Two (a, b); // error masked by earlier error
@@ -43,4 +45,5 @@ void g (N::A *a, M::B *b, O::C *c)
   Three (b); // ok
   Three (a, b); // ok
   Three (a); // { dg-error "not declared" }
+  // { dg-message "note" "suggested alternative" { target *-*-* } 47 }
 }
diff --git a/gcc/testsuite/g++.dg/overload/koenig1.C b/gcc/testsuite/g++.dg/overload/koenig1.C
index 1ed7bce..be0be69 100644
--- a/gcc/testsuite/g++.dg/overload/koenig1.C
+++ b/gcc/testsuite/g++.dg/overload/koenig1.C
@@ -14,5 +14,6 @@ void g ()
   B *bp;
   N::A *ap;
   f (bp);			// { dg-error "not declared" }
+  // { dg-message "note" "suggested alternative" { target *-*-* } 16 }
   f (ap);
 }
diff --git a/gcc/testsuite/g++.dg/parse/decl-specifier-1.C b/gcc/testsuite/g++.dg/parse/decl-specifier-1.C
index e81fbab..48fc7fa 100644
--- a/gcc/testsuite/g++.dg/parse/decl-specifier-1.C
+++ b/gcc/testsuite/g++.dg/parse/decl-specifier-1.C
@@ -13,4 +13,5 @@ N::X X;                           // { dg-error "" "" }
 int main()
 {
     return sizeof(X);             // { dg-error "" "" }
+    // { dg-message "note" "suggested alternative" { target *-*-* } 15 }
 }
diff --git a/gcc/testsuite/g++.dg/template/static10.C b/gcc/testsuite/g++.dg/template/static10.C
index ab857bd..2f60f0c 100644
--- a/gcc/testsuite/g++.dg/template/static10.C
+++ b/gcc/testsuite/g++.dg/template/static10.C
@@ -20,4 +20,5 @@ namespace std
 {
   template<> void
   vector<int, allocator<int> >::swap(vector<int, allocator<int> >&) { } // { dg-error "" }
+  // { dg-message "note" "suggested alternative" { target *-*-* } 22 }
 }
diff --git a/gcc/testsuite/g++.old-deja/g++.mike/ns5.C b/gcc/testsuite/g++.old-deja/g++.mike/ns5.C
index 9d806ca..f13da04 100644
--- a/gcc/testsuite/g++.old-deja/g++.mike/ns5.C
+++ b/gcc/testsuite/g++.old-deja/g++.mike/ns5.C
@@ -4,3 +4,4 @@ namespace A {
 }
 
 int j = i;		// { dg-error "" } 
+  // { dg-message "note" "suggested alternative" { target *-*-* } 6 }
diff --git a/gcc/testsuite/g++.old-deja/g++.mike/ns7.C b/gcc/testsuite/g++.old-deja/g++.mike/ns7.C
index 57008db..31a71dd 100644
--- a/gcc/testsuite/g++.old-deja/g++.mike/ns7.C
+++ b/gcc/testsuite/g++.old-deja/g++.mike/ns7.C
@@ -6,4 +6,5 @@ namespace A {
 
 namespace B {
   int j = i;	// { dg-error "" } 
+  // { dg-message "note" "suggested alternative" { target *-*-* } 8 }
 }
diff --git a/gcc/testsuite/g++.old-deja/g++.ns/koenig5.C b/gcc/testsuite/g++.old-deja/g++.ns/koenig5.C
index 33061ad..67b781d 100644
--- a/gcc/testsuite/g++.old-deja/g++.ns/koenig5.C
+++ b/gcc/testsuite/g++.old-deja/g++.ns/koenig5.C
@@ -15,4 +15,5 @@ void g()
 			 // foo variable first, and therefore do not
 			 // perform argument-dependent lookup.
   bar(new X);            // { dg-error "not declared" }
+  // { dg-message "note" "suggested alternative" { target *-*-* } 17 }
 }
diff --git a/gcc/testsuite/g++.old-deja/g++.ns/koenig9.C b/gcc/testsuite/g++.old-deja/g++.ns/koenig9.C
index 78b0e8b..f246639 100644
--- a/gcc/testsuite/g++.old-deja/g++.ns/koenig9.C
+++ b/gcc/testsuite/g++.old-deja/g++.ns/koenig9.C
@@ -10,4 +10,5 @@ void foo(const char*,...);
 inline void
 bar() {
   foo("",count);    //  { dg-error "" } multiple overloaded count functions
+  // { dg-message "note" "suggested alternative" { target *-*-* } 12 }
 }
diff --git a/gcc/testsuite/g++.old-deja/g++.other/lineno5.C b/gcc/testsuite/g++.old-deja/g++.other/lineno5.C
index d14bd90..20e49bc 100644
--- a/gcc/testsuite/g++.old-deja/g++.other/lineno5.C
+++ b/gcc/testsuite/g++.old-deja/g++.other/lineno5.C
@@ -16,4 +16,5 @@ namespace tmp {
 class A {
   public:
   int kaka(tmp::B = b);		// { dg-error "" } no b in scope
+  // { dg-message "note" "suggested alternative" { target *-*-* } 18 }
 };
diff --git a/libdecnumber/ChangeLog b/libdecnumber/ChangeLog
index d2d6d59..101cda9 100644
--- a/libdecnumber/ChangeLog
+++ b/libdecnumber/ChangeLog
@@ -1,3 +1,8 @@
+2010-11-24  Nathan Froyd  <froydnj@codesourcery.com>
+
+	* dconfig.h (LIBGCC2_FLOAT_WORDS_BIG_ENDIAN): Delete.
+	(WORDS_BIG_ENDIAN): Define based on value of __FLOAT_WORD_ORDER__.
+
 2010-10-23  Nathan Froyd  <froydnj@codesourcery.com>
 
 	* dconfig.h (LIBGCC2_WORDS_BIG_ENDIAN): Delete.
diff --git a/libdecnumber/dconfig.h b/libdecnumber/dconfig.h
index 26b963c..503cb61 100644
--- a/libdecnumber/dconfig.h
+++ b/libdecnumber/dconfig.h
@@ -28,12 +28,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "coretypes.h"
 #include "tm.h"
 
-#ifndef LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
-#define LIBGCC2_FLOAT_WORDS_BIG_ENDIAN \
-  (__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__)
-#endif
-
-#if LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
+#if __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__
 #define WORDS_BIGENDIAN 1
 #endif
 
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 0f18b56..0e31d98 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,10 @@
+2010-11-24  Nathan Froyd  <froydnj@codesourcery.com>
+
+	* config/libbid/bid_conf.h (BID_BIG_ENDIAN): Define in terms of
+	__FLOAT_WORD_ORDER__.
+	* config/libbid/bid_gcc_intrinsics.h (LIBGCC2_FLOAT_WORDS_BIG_ENDIAN):
+	Delete.
+
 2010-11-20  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	PR other/46202
diff --git a/libgcc/config/libbid/bid_conf.h b/libgcc/config/libbid/bid_conf.h
index d22980d..93e60ed 100644
--- a/libgcc/config/libbid/bid_conf.h
+++ b/libgcc/config/libbid/bid_conf.h
@@ -516,7 +516,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #endif
 
 #ifndef BID_BIG_ENDIAN
-#define BID_BIG_ENDIAN LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
+#define BID_BIG_ENDIAN __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__
 #endif
 
 #ifndef BID_THREAD
diff --git a/libgcc/config/libbid/bid_gcc_intrinsics.h b/libgcc/config/libbid/bid_gcc_intrinsics.h
index f536e3b..7d65705 100644
--- a/libgcc/config/libbid/bid_gcc_intrinsics.h
+++ b/libgcc/config/libbid/bid_gcc_intrinsics.h
@@ -30,11 +30,6 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "coretypes.h"
 #include "tm.h"
 
-#ifndef LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
-#define LIBGCC2_FLOAT_WORDS_BIG_ENDIAN \
-  (__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__)
-#endif
-
 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
 #endif