From: Jeffrey A Law <law@cygnus.com>
Date: Sun, 14 Feb 1999 22:39:22 +0000 (+0000)
Subject: regclass.c (allocate_reg_info): Respect MIN when clearing data.
X-Git-Tag: prereleases/egcs-1.1.2-prerelease-1~9
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a461ed20cabf0b6d80c5ca2388782d677153dab;p=thirdparty%2Fgcc.git

regclass.c (allocate_reg_info): Respect MIN when clearing data.

        Mon Aug 17 02:03:55 1998  Richard Henderson  <rth@cygnus.com>
        * regclass.c (allocate_reg_info): Respect MIN when clearing data.

From-SVN: r25207
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a6e7d386fa3a..9d7affa09776 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 Sun Feb 14 23:05:34 1999  Jeffrey A Law  (law@cygnus.com)
 
+	Mon Aug 17 02:03:55 1998  Richard Henderson  <rth@cygnus.com>
+	* regclass.c (allocate_reg_info): Respect MIN when clearing data.
+
 	* loop.c (scan_loop): Fix typo in last change.
 
 Sat Feb 13 11:53:12 1999  Jeffrey A Law  (law@cygnus.com)
diff --git a/gcc/regclass.c b/gcc/regclass.c
index 3cad5aa54b14..25cac8f282fd 100644
--- a/gcc/regclass.c
+++ b/gcc/regclass.c
@@ -1866,18 +1866,19 @@ allocate_reg_info (num_regs, new_p, renumber_p)
 	  size_t max_index = reg_data->max_index;
 
 	  reg_next = reg_data->next;
-	  if (min_index <= regno_allocated)
+	  if (min <= max_index)
 	    {
 	      size_t max = max_index;
-	      if (max > regno_allocated)
-		max = regno_allocated;
+	      size_t local_min = min - min_index;
+	      if (min < min_index)
+		local_min = 0;
 	      if (!reg_data->used_p)	/* page just allocated with calloc */
 		reg_data->used_p = 1;	/* no need to zero */
 	      else
-		bzero ((char *) &reg_data->data,
-		       sizeof (reg_info) * (max - min_index + 1));
+		bzero ((char *) &reg_data->data[local_min],
+		       sizeof (reg_info) * (max - min_index - local_min + 1));
 
-	      for (i = min_index; i <= max; i++)
+	      for (i = min_index+local_min; i <= max; i++)
 		{
 		  VARRAY_REG (reg_n_info, i) = &reg_data->data[i-min_index];
 		  REG_BASIC_BLOCK (i) = REG_BLOCK_UNKNOWN;