From patchwork Wed Jun 16 15:53:02 2010
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Subject: 0001-Add-hoist_insn-debug-counter.patch
Date: Wed, 16 Jun 2010 05:53:02 -0000
From: Maxim Kuvyrkov <maxim@codesourcery.com>
X-Patchwork-Id: 55901
Message-Id: <4C18F35E.4000508@codesourcery.com>
To: Jeff Law <law@redhat.com>, gcc-patches <gcc-patches@gcc.gnu.org>

This patch adds new debug counter to the hoisting pass.

OK to apply?

Thank you,


diff --git a/gcc/dbgcnt.def b/gcc/dbgcnt.def
index 33afb0b..56f3461 100644
--- a/gcc/dbgcnt.def
+++ b/gcc/dbgcnt.def
@@ -158,6 +158,7 @@ DEBUG_COUNTER (gcse2_delete)
 DEBUG_COUNTER (global_alloc_at_func)
 DEBUG_COUNTER (global_alloc_at_reg)
 DEBUG_COUNTER (hoist)
+DEBUG_COUNTER (hoist_insn)
 DEBUG_COUNTER (ia64_sched2)
 DEBUG_COUNTER (if_conversion)
 DEBUG_COUNTER (if_after_combine)
diff --git a/gcc/gcse.c b/gcc/gcse.c
index b0a1868..1dbd2f0 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -4325,7 +4325,7 @@ hoist_code (void)
 		 the vast majority of hoistable expressions are only movable
 		 from two successors, so raising this threshold is likely
 		 to nullify any benefit we get from code hoisting.  */
-	      if (hoistable > 1)
+	      if (hoistable > 1 && dbg_cnt (hoist_insn))
 		{
 		  SET_BIT (hoist_exprs[bb->index], i);
 		  found = 1;