Eliminate source_location in favor of location_t

Historically GCC used location_t, while libcpp used source_location.

This inconsistency has been annoying me for a while, so this patch
removes source_location in favor of location_t throughout
(as the latter is shorter).

gcc/ChangeLog:
	* builtins.c: Replace "source_location" with "location_t".
	* diagnostic-show-locus.c: Likewise.
	* diagnostic.c: Likewise.
	* dumpfile.c: Likewise.
	* gcc-rich-location.h: Likewise.
	* genmatch.c: Likewise.
	* gimple.h: Likewise.
	* gimplify.c: Likewise.
	* input.c: Likewise.
	* input.h: Likewise.  Eliminate the typedef.
	* omp-expand.c: Likewise.
	* selftest.h: Likewise.
	* substring-locations.h (get_source_location_for_substring):
	Rename to..
	(get_location_within_string): ...this.
	* tree-cfg.c: Replace "source_location" with "location_t".
	* tree-cfgcleanup.c: Likewise.
	* tree-diagnostic.c: Likewise.
	* tree-into-ssa.c: Likewise.
	* tree-outof-ssa.c: Likewise.
	* tree-parloops.c: Likewise.
	* tree-phinodes.c: Likewise.
	* tree-phinodes.h: Likewise.
	* tree-ssa-loop-ivopts.c: Likewise.
	* tree-ssa-loop-manip.c: Likewise.
	* tree-ssa-phiopt.c: Likewise.
	* tree-ssa-phiprop.c: Likewise.
	* tree-ssa-threadupdate.c: Likewise.
	* tree-ssa.c: Likewise.
	* tree-ssa.h: Likewise.
	* tree-vect-loop-manip.c: Likewise.

gcc/c-family/ChangeLog:
	* c-common.c (c_get_substring_location): Update for renaming of
	get_source_location_for_substring to get_location_within_string.
	* c-lex.c: Replace "source_location" with "location_t".
	* c-opts.c: Likewise.
	* c-ppoutput.c: Likewise.

gcc/c/ChangeLog:
	* c-decl.c: Replace "source_location" with "location_t".
	* c-tree.h: Likewise.
	* c-typeck.c: Likewise.
	* gimple-parser.c: Likewise.

gcc/cp/ChangeLog:
	* call.c: Replace "source_location" with "location_t".
	* cp-tree.h: Likewise.
	* cvt.c: Likewise.
	* name-lookup.c: Likewise.
	* parser.c: Likewise.
	* typeck.c: Likewise.

gcc/fortran/ChangeLog:
	* cpp.c: Replace "source_location" with "location_t".
	* gfortran.h: Likewise.

gcc/go/ChangeLog:
	* go-gcc-diagnostics.cc: Replace "source_location" with "location_t".
	* go-gcc.cc: Likewise.
	* go-linemap.cc: Likewise.
	* go-location.h: Likewise.
	* gofrontend/README: Likewise.

gcc/jit/ChangeLog:
	* jit-playback.c: Replace "source_location" with "location_t".

gcc/testsuite/ChangeLog:
	* g++.dg/plugin/comment_plugin.c: Replace "source_location" with
	"location_t".
	* gcc.dg/plugin/diagnostic_plugin_test_show_locus.c: Likewise.

libcc1/ChangeLog:
	* libcc1plugin.cc: Replace "source_location" with "location_t".
	(plugin_context::get_source_location): Rename to...
	(plugin_context::get_location_t): ...this.
	* libcp1plugin.cc: Likewise.

libcpp/ChangeLog:
	* charset.c: Replace "source_location" with "location_t".
	* directives-only.c: Likewise.
	* directives.c: Likewise.
	* errors.c: Likewise.
	* expr.c: Likewise.
	* files.c: Likewise.
	* include/cpplib.h: Likewise.  Rename MAX_SOURCE_LOCATION to
	MAX_LOCATION_T.
	* include/line-map.h: Likewise.
	* init.c: Likewise.
	* internal.h: Likewise.
	* lex.c: Likewise.
	* line-map.c: Likewise.
	* location-example.txt: Likewise.
	* macro.c: Likewise.
	* pch.c: Likewise.
	* traditional.c: Likewise.

From-SVN: r266085

libcpp/expr.c

@@ -30,7 +30,7 @@ struct op
 {
   const cpp_token *token;	/* The token forming op (for diagnostics).  */
   cpp_num value;		/* The value logically "right" of op.  */
-  source_location loc;          /* The location of this value.         */
+  location_t loc;          /* The location of this value.         */
   enum cpp_ttype op;
 };
 
@@ -52,13 +52,13 @@ static cpp_num num_equality_op (cpp_reader *, cpp_num, cpp_num,
 				enum cpp_ttype);
 static cpp_num num_mul (cpp_reader *, cpp_num, cpp_num);
 static cpp_num num_div_op (cpp_reader *, cpp_num, cpp_num, enum cpp_ttype,
-			   source_location);
+			   location_t);
 static cpp_num num_lshift (cpp_num, size_t, size_t);
 static cpp_num num_rshift (cpp_num, size_t, size_t);
 
 static cpp_num append_digit (cpp_num, int, int, size_t);
 static cpp_num parse_defined (cpp_reader *);
-static cpp_num eval_token (cpp_reader *, const cpp_token *, source_location);
+static cpp_num eval_token (cpp_reader *, const cpp_token *, location_t);
 static struct op *reduce (cpp_reader *, struct op *, enum cpp_ttype);
 static unsigned int interpret_float_suffix (cpp_reader *, const uchar *, size_t);
 static unsigned int interpret_int_suffix (cpp_reader *, const uchar *, size_t);
@@ -505,7 +505,7 @@ cpp_get_userdef_suffix (const cpp_token *tok)
    VIRTUAL_LOCATION is the virtual location for TOKEN.  */
 unsigned int
 cpp_classify_number (cpp_reader *pfile, const cpp_token *token,
-		     const char **ud_suffix, source_location virtual_location)
+		     const char **ud_suffix, location_t virtual_location)
 {
   const uchar *str = token->val.str.text;
   const uchar *limit;
@@ -1091,7 +1091,7 @@ parse_defined (cpp_reader *pfile)
    operators).  */
 static cpp_num
 eval_token (cpp_reader *pfile, const cpp_token *token,
-	    source_location virtual_location)
+	    location_t virtual_location)
 {
   cpp_num result;
   unsigned int temp;
@@ -1288,7 +1288,7 @@ _cpp_parse_expr (cpp_reader *pfile, bool is_if)
   struct op *top = pfile->op_stack;
   unsigned int lex_count;
   bool saw_leading_not, want_value = true;
-  source_location virtual_location = 0;
+  location_t virtual_location = 0;
 
   pfile->state.skip_eval = 0;
 
@@ -2086,7 +2086,7 @@ num_mul (cpp_reader *pfile, cpp_num lhs, cpp_num rhs)
 
 static cpp_num
 num_div_op (cpp_reader *pfile, cpp_num lhs, cpp_num rhs, enum cpp_ttype op,
-	    source_location location)
+	    location_t location)
 {
   cpp_num result, sub;
   cpp_num_part mask;