dumpfile.c/h: add "const" to dump location ctors

gcc/ChangeLog:
	* dumpfile.c (dump_user_location_t::dump_user_location_t): Add
	"const" to the "gimple *" and "rtx_insn *" parameters.
	* dumpfile.h (dump_user_location_t::dump_user_location_t):
	Likewise.
	(dump_location_t::dump_location_t): Likewise.

From-SVN: r263244

gcc/ChangeLog

+2018-08-02  David Malcolm  <dmalcolm@redhat.com>
+
+	* dumpfile.c (dump_user_location_t::dump_user_location_t): Add
+	"const" to the "gimple *" and "rtx_insn *" parameters.
+	* dumpfile.h (dump_user_location_t::dump_user_location_t):
+	Likewise.
+	(dump_location_t::dump_location_t): Likewise.
+
 2018-08-01  Martin Sebor  <msebor@redhat.com>
 
 	PR tree-optimization/86650

gcc/dumpfile.c

@@ -397,7 +397,7 @@ dump_open_alternate_stream (struct dump_file_info *dfi)
 /* Construct a dump_user_location_t from STMT (using its location and
    hotness).  */
 
-dump_user_location_t::dump_user_location_t (gimple *stmt)
+dump_user_location_t::dump_user_location_t (const gimple *stmt)
 : m_count (), m_loc (UNKNOWN_LOCATION)
 {
   if (stmt)
@@ -411,7 +411,7 @@ dump_user_location_t::dump_user_location_t (gimple *stmt)
 /* Construct a dump_user_location_t from an RTL instruction (using its
    location and hotness).  */
 
-dump_user_location_t::dump_user_location_t (rtx_insn *insn)
+dump_user_location_t::dump_user_location_t (const rtx_insn *insn)
 : m_count (), m_loc (UNKNOWN_LOCATION)
 {
   if (insn)

gcc/dumpfile.h

@@ -285,10 +285,10 @@ class dump_user_location_t
   dump_user_location_t () : m_count (), m_loc (UNKNOWN_LOCATION) {}
 
   /* Construct from a gimple statement (using its location and hotness).  */
-  dump_user_location_t (gimple *stmt);
+  dump_user_location_t (const gimple *stmt);
 
   /* Construct from an RTL instruction (using its location and hotness).  */
-  dump_user_location_t (rtx_insn *insn);
+  dump_user_location_t (const rtx_insn *insn);
 
   /* Construct from a location_t.  This one is deprecated (since it doesn't
      capture hotness information); it thus needs to be spelled out.  */
@@ -363,7 +363,7 @@ class dump_location_t
   }
 
   /* Construct from a gimple statement (using its location and hotness).  */
-  dump_location_t (gimple *stmt,
+  dump_location_t (const gimple *stmt,
 		   const dump_impl_location_t &impl_location
 		     = dump_impl_location_t ())
   : m_user_location (dump_user_location_t (stmt)),
@@ -372,7 +372,7 @@ class dump_location_t
   }
 
   /* Construct from an RTL instruction (using its location and hotness).  */
-  dump_location_t (rtx_insn *insn,
+  dump_location_t (const rtx_insn *insn,
 		   const dump_impl_location_t &impl_location
 		   = dump_impl_location_t ())
   : m_user_location (dump_user_location_t (insn)),