From: rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 26 Nov 2002 00:51:17 +0000 (+0000)
Subject:         * alias.c (find_base_value): Use new_reg_base_value if it's live.
X-Git-Tag: upstream/4.9.2~83246
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e5be0cc6bb25467fda221aa46461288ea5999e1c;p=platform%2Fupstream%2Flinaro-gcc.git

    * alias.c (find_base_value): Use new_reg_base_value if it's live.
        (copying_arguments): Make boolean.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@59483 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 04a4f7a..bcb5208 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2002-11-25  Richard Henderson  <rth@redhat.com>
+
+	* alias.c (find_base_value): Use new_reg_base_value if it's live.
+	(copying_arguments): Make boolean.
+
 2002-11-25  Jason Thorpe  <thorpej@wasabisystems.com>
 
 	* gcc.c (static_spec_functions): Add if-exists-else spec
diff --git a/gcc/alias.c b/gcc/alias.c
index ca560b6..45e868c 100644
--- a/gcc/alias.c
+++ b/gcc/alias.c
@@ -199,7 +199,7 @@ char *reg_known_equiv_p;
 
 /* True when scanning insns from the start of the rtl to the
    NOTE_INSN_FUNCTION_BEG note.  */
-static int copying_arguments;
+static bool copying_arguments;
 
 /* The splay-tree used to store the various alias set entries.  */
 static splay_tree alias_sets;
@@ -781,9 +781,16 @@ find_base_value (src)
 	 The test above is not sufficient because the scheduler may move
 	 a copy out of an arg reg past the NOTE_INSN_FUNCTION_BEGIN.  */
       if ((regno >= FIRST_PSEUDO_REGISTER || fixed_regs[regno])
-	  && regno < reg_base_value_size
-	  && reg_base_value[regno])
-	return reg_base_value[regno];
+	  && regno < reg_base_value_size)
+	{
+	  /* If we're inside init_alias_analysis, use new_reg_base_value
+	     to reduce the number of relaxation iterations.  */
+	  if (new_reg_base_value && new_reg_base_value[regno])
+	    return new_reg_base_value[regno];
+
+	  if (reg_base_value[regno])
+	    return reg_base_value[regno];
+	}
 
       return src;
 
@@ -2744,7 +2751,7 @@ init_alias_analysis ()
 
       /* We're at the start of the function each iteration through the
 	 loop, so we're copying arguments.  */
-      copying_arguments = 1;
+      copying_arguments = true;
 
       /* Wipe the potential alias information clean for this pass.  */
       memset ((char *) new_reg_base_value, 0, reg_base_value_size * sizeof (rtx));
@@ -2834,7 +2841,7 @@ init_alias_analysis ()
 	    }
 	  else if (GET_CODE (insn) == NOTE
 		   && NOTE_LINE_NUMBER (insn) == NOTE_INSN_FUNCTION_BEG)
-	    copying_arguments = 0;
+	    copying_arguments = false;
 	}
 
       /* Now propagate values from new_reg_base_value to reg_base_value.  */