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loop.c (remove_constant_addition): Avoid clobbering a shared CONST expression.

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* loop.c (remove_constant_addition): Avoid clobbering a shared
	CONST expression.

Co-Authored-By: Jan Hubicka <jh@suse.cz>

From-SVN: r49556
This commit is contained in:
Janis Johnson 2002-02-06 22:13:01 +00:00 committed by Janis Johnson
parent 199ecb183b
commit a2cd028f5f
2 changed files with 18 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2002-02-06 Janis Johnson <janis187@us.ibm.com>
Jan Hubicka <jh@suse.cz>
* loop.c (remove_constant_addition): Avoid clobbering a shared
CONST expression.
2002-02-06 Ulrich Weigand <uweigand@de.ibm.com>
* config.gcc (s390x-*-linux*): Add t-linux64 makefile fragment.

13
gcc/loop.c
View File

@ -3683,8 +3683,19 @@ remove_constant_addition (x)
HOST_WIDE_INT addval = 0;
rtx exp = *x;
/* Avoid clobbering a shared CONST expression. */
if (GET_CODE (exp) == CONST)
exp = XEXP (exp, 0);
{
if (GET_CODE (XEXP (exp, 0)) == PLUS
&& GET_CODE (XEXP (XEXP (exp, 0), 0)) == SYMBOL_REF
&& GET_CODE (XEXP (XEXP (exp, 0), 1)) == CONST_INT)
{
*x = XEXP (XEXP (exp, 0), 0);
return INTVAL (XEXP (XEXP (exp, 0), 1));
}
return 0;
}
if (GET_CODE (exp) == CONST_INT)
{
addval = INTVAL (exp);