PR preprocessor/69126: avoid comparing ad-hoc and non-ad-hoc locations

gcc/testsuite/ChangeLog:
	PR preprocessor/69126
	PR preprocessor/69543
	* c-c++-common/pr69126-2-long.c: New test.
	* c-c++-common/pr69126-2-short.c: New test.
	* c-c++-common/pr69543-1.c: Remove xfail.

libcpp/ChangeLog:
	PR preprocessor/69126
	PR preprocessor/69543
	* line-map.c (linemap_compare_locations): At the function top,
	replace inlined bodies of get_location_from_adhoc_loc with calls
	to get_location_from_adhoc_loc.  Add a pair of calls to
	get_location_from_adhoc_loc at the bottom of the function, to
	avoid meaningless comparisons of ad-hoc and non-ad-hoc locations.

From-SVN: r233638

gcc/testsuite/ChangeLog

@@ -2,6 +2,14 @@
 
 	PR preprocessor/69126
 	PR preprocessor/69543
+	* c-c++-common/pr69126-2-long.c: New test.
+	* c-c++-common/pr69126-2-short.c: New test.
+	* c-c++-common/pr69543-1.c: Remove xfail.
+
+2016-02-23  David Malcolm  <dmalcolm@redhat.com>
+
+	PR preprocessor/69126
+	PR preprocessor/69543
 	PR preprocessor/69558
 	* c-c++-common/pr69126.c (MACRO_1, test_1): New.
 	(f): Rename to...

gcc/testsuite/c-c++-common/pr69126-2-long.c

+/* { dg-options "-Wdeprecated-declarations" } */
+
+/* The macro's name is >= 32 characters long, and hence its location
+   requires an ad-hoc location.  */
+
+#define IGNORE_WHERE_MACRO_IS_LONGER_THAN_31_CHARS  _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+__attribute__((deprecated)) void f();
+int main() {
+    IGNORE_WHERE_MACRO_IS_LONGER_THAN_31_CHARS
+    f();
+}

gcc/testsuite/c-c++-common/pr69126-2-short.c

+/* { dg-options "-Wdeprecated-declarations" } */
+
+/* IGNORE_SHORT_MACRO is < 32 characters long, and hence its location
+   can be stored without needing an ad-hoc location.  */
+
+#define IGNORE_SHORT_MACRO  _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+__attribute__((deprecated)) void f();
+int main() {
+    IGNORE_SHORT_MACRO
+    f();
+}

gcc/testsuite/c-c++-common/pr69543-1.c

@@ -3,8 +3,6 @@
 /* Verify disabling a warning, where the _Pragma is within
    a macro, but the affected code is *not* in a macro.  */
 
-/* TODO: XFAIL: why does g++ still emit a warning here? (works for C).  */
-
 # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN	\
     _Pragma ("GCC diagnostic push") \
     _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\
@@ -16,6 +14,6 @@ void test (char yylval)
 {
   char *yyvsp;
   YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
-  *++yyvsp = yylval; /* { dg-bogus "used uninitialized" "" { xfail { c++ } } } */
+  *++yyvsp = yylval;
   YY_IGNORE_MAYBE_UNINITIALIZED_END
 }

libcpp/ChangeLog

+2016-02-23  David Malcolm  <dmalcolm@redhat.com>
+
+	PR preprocessor/69126
+	PR preprocessor/69543
+	* line-map.c (linemap_compare_locations): At the function top,
+	replace inlined bodies of get_location_from_adhoc_loc with calls
+	to get_location_from_adhoc_loc.  Add a pair of calls to
+	get_location_from_adhoc_loc at the bottom of the function, to
+	avoid meaningless comparisons of ad-hoc and non-ad-hoc locations.
+
 2016-02-08  David Malcolm  <dmalcolm@redhat.com>
 
 	PR preprocessor/69664

libcpp/line-map.c

@@ -1328,9 +1328,9 @@ linemap_compare_locations (struct line_maps *set,
   source_location l0 = pre, l1 = post;
 
   if (IS_ADHOC_LOC (l0))
-    l0 = set->location_adhoc_data_map.data[l0 & MAX_SOURCE_LOCATION].locus;
+    l0 = get_location_from_adhoc_loc (set, l0);
   if (IS_ADHOC_LOC (l1))
-    l1 = set->location_adhoc_data_map.data[l1 & MAX_SOURCE_LOCATION].locus;
+    l1 = get_location_from_adhoc_loc (set, l1);
 
   if (l0 == l1)
     return 0;
@@ -1365,6 +1365,11 @@ linemap_compare_locations (struct line_maps *set,
       return i1 - i0;
     }
 
+  if (IS_ADHOC_LOC (l0))
+    l0 = get_location_from_adhoc_loc (set, l0);
+  if (IS_ADHOC_LOC (l1))
+    l1 = get_location_from_adhoc_loc (set, l1);
+
   return l1 - l0;
 }