From patchwork Thu Jun 10 10:41:27 2010
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Subject: Use a debug counter in SRA
Date: Thu, 10 Jun 2010 00:41:27 -0000
From: Martin Jambor <mjambor@suse.cz>
X-Patchwork-Id: 55198
Message-Id: <20100610104127.GB29266@virgil.suse.cz>
To: GCC Patches <gcc-patches@gcc.gnu.org>
Cc: Richard Guenther <rguenther@suse.de>

Hi,

the patch below adds a debug counter check to the gate of the SRAs for
better debugging and even bi-secting problems by users.

Bootstrapped and tested on x86_64-linux.  OK for trunk?

Thanks,

Martin


2010-06-10  Martin Jambor  <mjambor@suse.cz>

	* Makefile.in (tree-sra.o): Add DBGCNT_H to dependencies.
	* dbgcnt.def (tree_sra): New counter.
	* tree-sra.c: Include dbgcnt.h.
	(gate_intra_sra): Check tree_sra debug counter.


Index: mine/gcc/Makefile.in
===================================================================
--- mine.orig/gcc/Makefile.in
+++ mine/gcc/Makefile.in
@@ -3112,7 +3112,7 @@ tree-ssa-ccp.o : tree-ssa-ccp.c $(TREE_F
 tree-sra.o : tree-sra.c $(CONFIG_H) $(SYSTEM_H) coretypes.h alloc-pool.h \
    $(TM_H) $(TREE_H) $(GIMPLE_H) $(CGRAPH_H) $(TREE_FLOW_H) $(IPA_PROP_H) \
    $(DIAGNOSTIC_H) statistics.h $(TREE_DUMP_H) $(TIMEVAR_H) $(PARAMS_H) \
-   $(TARGET_H) $(FLAGS_H) $(EXPR_H) tree-pretty-print.h
+   $(TARGET_H) $(FLAGS_H) $(EXPR_H) tree-pretty-print.h $(DBGCNT_H)
 tree-switch-conversion.o : tree-switch-conversion.c $(CONFIG_H) $(SYSTEM_H) \
     $(TREE_H) $(TM_P_H) $(TREE_FLOW_H) $(DIAGNOSTIC_H) $(TREE_INLINE_H) \
     $(TIMEVAR_H) $(TM_H) coretypes.h $(TREE_DUMP_H) $(GIMPLE_H) \
Index: mine/gcc/dbgcnt.def
===================================================================
--- mine.orig/gcc/dbgcnt.def
+++ mine/gcc/dbgcnt.def
@@ -167,6 +167,7 @@ DEBUG_COUNTER (postreload_cse)
 DEBUG_COUNTER (pre)
 DEBUG_COUNTER (pre_insn)
 DEBUG_COUNTER (treepre_insert)
+DEBUG_COUNTER (tree_sra)
 DEBUG_COUNTER (sched2_func)
 DEBUG_COUNTER (sched_block)
 DEBUG_COUNTER (sched_func)
Index: mine/gcc/tree-sra.c
===================================================================
--- mine.orig/gcc/tree-sra.c
+++ mine/gcc/tree-sra.c
@@ -88,6 +88,7 @@ along with GCC; see the file COPYING3.
 #include "params.h"
 #include "target.h"
 #include "flags.h"
+#include "dbgcnt.h"
 
 /* Enumeration of all aggregate reductions we can do.  */
 enum sra_mode { SRA_MODE_EARLY_IPA,   /* early call regularization */
@@ -2936,7 +2937,7 @@ late_intra_sra (void)
 static bool
 gate_intra_sra (void)
 {
-  return flag_tree_sra != 0;
+  return flag_tree_sra != 0 && dbg_cnt (tree_sra);
 }