Give proper type and size to named cold partitions.

2015-04-27  Caroline Tice  <cmtice@google.com>

	* final.c (final_scan_insn):  Output cold_function_nmae as function
	type.
	* varasm.c (cold_function_name):  Make gloval.
	(assemble_start_function):  Re-set cold_function_name.
	(assemble_end_function): Output cold partition size.
	* varasm.h (cold_fun ction_name):  Declare global.

2015-04-27  Caroline Tice  <cmtice@google.com>

	* gcc.dg/tree-prof/cold_partition_label.c (main): Check for cold
	partition size.

From-SVN: r222473

gcc/ChangeLog

@@ -1,3 +1,12 @@
+2015-04-27  Caroline Tice  <cmtice@google.com>
+
+	* final.c (final_scan_insn):  Output cold_function_nmae as function
+	type.
+	* varasm.c (cold_function_name):  Make gloval.
+	(assemble_start_function):  Re-set cold_function_name.
+	(assemble_end_function): Output cold partition size.
+	* varasm.h (cold_fun ction_name):  Declare global.
+
 2015-04-27  Ilya Tocar  <ilya.tocar@intel.com>
 
 	* config/i386/i386.h (EXT_REX_SSE_REG_P): New.

gcc/final.c

@@ -2233,10 +2233,16 @@ final_scan_insn (rtx_insn *insn, FILE *file, int optimize_p ATTRIBUTE_UNUSED,
 	     suffixing "cold" to the original function's name.  */
 	  if (in_cold_section_p)
 	    {
-	      tree cold_function_name
+	      cold_function_name
 		= clone_function_name (current_function_decl, "cold");
+#ifdef ASM_DECLARE_FUNCTION_NAME
+	      ASM_DECLARE_FUNCTION_NAME (asm_out_file,
+					 IDENTIFIER_POINTER (cold_function_name),
+					 current_function_decl);
+#else
 	      ASM_OUTPUT_LABEL (asm_out_file,
 				IDENTIFIER_POINTER (cold_function_name));
+#endif
 	    }
 	  break;
 

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2015-04-27  Caroline Tice  <cmtice@google.com>
+
+	* gcc.dg/tree-prof/cold_partition_label.c (main): Check for cold
+	partition size.
+
 2015-04-27  Peter Bergner  <bergner@vnet.ibm.com>
 
 	PR target/64579

gcc/testsuite/gcc.dg/tree-prof/cold_partition_label.c

@@ -35,4 +35,6 @@ main (int argc, char *argv[])
   return 0;
 }
 
+/* { dg-final-use { scan-assembler "foo\[._\]+cold\[\._\]+0" } } */
+/* { dg-final-use { scan-assembler "size\[ \ta-zA-Z0-0\]+foo\[._\]+cold\[\._\]+0" } } */
 /* { dg-final-use { cleanup-saved-temps } } */

gcc/varasm.c

@@ -187,6 +187,13 @@ section *in_section;
    at the cold section.  */
 bool in_cold_section_p;
 
+/* The following global holds the "function name" for the code in the
+   cold section of a function, if hot/cold function splitting is enabled
+   and there was actually code that went into the cold section.  A
+   pseudo function name is needed for the cold section of code for some
+   debugging tools that perform symbolization. */
+tree cold_function_name = NULL_TREE;
+
 /* A linked list of all the unnamed sections.  */
 static GTY(()) section *unnamed_sections;
 
@@ -1719,6 +1726,7 @@ assemble_start_function (tree decl, const char *fnname)
       ASM_GENERATE_INTERNAL_LABEL (tmp_label, "LCOLDE", const_labelno);
       crtl->subsections.cold_section_end_label = ggc_strdup (tmp_label);
       const_labelno++;
+      cold_function_name = NULL_TREE;
     }
   else
     {
@@ -1856,6 +1864,10 @@ assemble_end_function (tree decl, const char *fnname ATTRIBUTE_UNUSED)
 
       save_text_section = in_section;
       switch_to_section (unlikely_text_section ());
+      if (cold_function_name != NULL_TREE)
+	ASM_DECLARE_FUNCTION_SIZE (asm_out_file,
+				   IDENTIFIER_POINTER (cold_function_name),
+				   decl);
       ASM_OUTPUT_LABEL (asm_out_file, crtl->subsections.cold_section_end_label);
       if (first_function_block_is_cold)
 	switch_to_section (text_section);

gcc/varasm.h

@@ -20,6 +20,13 @@ along with GCC; see the file COPYING3.  If not see
 #ifndef GCC_VARASM_H
 #define GCC_VARASM_H
 
+/* The following global holds the "function name" for the code in the
+   cold section of a function, if hot/cold function splitting is enabled
+   and there was actually code that went into the cold section.  A
+   pseudo function name is needed for the cold section of code for some
+   debugging tools that perform symbolization. */
+extern tree cold_function_name;
+
 extern tree tree_output_constant_def (tree);
 extern void make_decl_rtl (tree);
 extern rtx make_decl_rtl_for_debug (tree);