Add -fmem-report-wpa

For parallel LTO builds setting -fmem-report does not work very well
because all the LTRANS phases dump it in parallel and typically interleave
it to unreadability.

Since usually the memory bottleneck is WPA add a flag to only dump
the memory report for that.

gcc/:
2012-09-08  Andi Kleen  <ak@linux.intel.com>

	* gcc/common.opt (-fmem-report-wpa): Add
	* gcc/doc/invoke.texi (-fmem-report-wpa): Document.
	* gcc/lto/lto.c (do_whole_program_analysis): Run mem_report
	when mem_report_wpa is set.

From-SVN: r191095

gcc/ChangeLog

+2012-09-08  Andi Kleen  <ak@linux.intel.com>
+
+	* gcc/common.opt (-fmem-report-wpa): Add
+	* gcc/doc/invoke.texi (-fmem-report-wpa): Document.
+	* gcc/lto/lto.c (do_whole_program_analysis): Run mem_report
+	when mem_report_wpa is set.
+
 2012-09-07  Anthony Green  <green@moxielogic.com>
 
 	* config/moxie/moxie.c (moxie_expand_prologue): Optimize prologue

gcc/common.opt

@@ -1470,6 +1470,10 @@ fmem-report
 Common Report Var(mem_report)
 Report on permanent memory allocation
 
+fmem-report-wpa
+Common Report Var(mem_report_wpa)
+Report on permanent memory allocation in WPA only
+
 ; This will attempt to merge constant section constants, if 1 only
 ; string constants and constants from constant pool, if 2 also constant
 ; variables.

gcc/doc/invoke.texi

@@ -328,7 +328,7 @@ Objective-C and Objective-C++ Dialects}.
 -feliminate-unused-debug-symbols -femit-class-debug-always @gol
 -fenable-@var{kind}-@var{pass} @gol
 -fenable-@var{kind}-@var{pass}=@var{range-list} @gol
--fdebug-types-section @gol
+-fdebug-types-section -fmem-report-wpa @gol
 -fmem-report -fpre-ipa-mem-report -fpost-ipa-mem-report -fprofile-arcs @gol
 -frandom-seed=@var{string} -fsched-verbose=@var{n} @gol
 -fsel-sched-verbose -fsel-sched-dump-cfg -fsel-sched-pipelining-verbose @gol
@@ -5132,6 +5132,11 @@ pass when it finishes.
 Makes the compiler print some statistics about permanent memory
 allocation when it finishes.
 
+@item -fmem-report-wpa
+@opindex fmem-report-wpa
+Makes the compiler print some statistics about permanent memory
+allocation for the WPA phase only.
+
 @item -fpre-ipa-mem-report
 @opindex fpre-ipa-mem-report
 @item -fpost-ipa-mem-report

gcc/lto/lto.c

@@ -2016,6 +2016,8 @@ do_whole_program_analysis (void)
   /* Show the LTO report before launching LTRANS.  */
   if (flag_lto_report)
     print_lto_report ();
+  if (mem_report_wpa)
+    dump_mem_report ();
 }