mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2024-12-24 06:18:59 +08:00
Code Issues Packages Projects Releases Wiki Activity

loop.c (check_dbra_loop): Fix calculation of FINAL_VALUE when COMPARISON_VAL was normalized.

Browse Source 
* loop.c (check_dbra_loop): Fix calculation of FINAL_VALUE when
	COMPARISON_VAL was normalized.

From-SVN: r22051
This commit is contained in:
J"orn Rennecke 1998-08-28 07:05:20 +00:00 committed by Joern Rennecke
parent af3d5d5313
commit 8ed69d0908
2 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
Fri Aug 28 14:54:07 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
* loop.c (check_dbra_loop): Fix calculation of FINAL_VALUE when
COMPARISON_VAL was normalized.
Thu Aug 27 20:10:46 1998 Jeffrey A Law (law@cygnus.com)
* loop.c (check_dbra_loop): The loop ending comparison value

12
gcc/loop.c
View File

@ -7004,11 +7004,18 @@ check_dbra_loop (loop_end, insn_count, loop_start)
return 0;
}
final_value = comparison_value;
/* Reset these in case we normalized the initial value
and comparison value above. */
if (GET_CODE (comparison_value) == CONST_INT
&& GET_CODE (initial_value) == CONST_INT)
{
comparison_value = GEN_INT (comparison_val);
final_value
= GEN_INT (comparison_val + INTVAL (bl->initial_value));
}
bl->initial_value = initial_value;
if (GET_CODE (comparison_value) == CONST_INT)
comparison_value = GEN_INT (comparison_val);
/* Save some info needed to produce the new insns. */
reg = bl->biv->dest_reg;
@ -7017,7 +7024,6 @@ check_dbra_loop (loop_end, insn_count, loop_start)
jump_label = XEXP (SET_SRC (PATTERN (PREV_INSN (loop_end))), 2);
new_add_val = GEN_INT (- INTVAL (bl->biv->add_val));
final_value = comparison_value;
/* Set start_value; if this is not a CONST_INT, we need
to generate a SUB.
Initialize biv to start_value before loop start.