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postreload.c (reload_combine): Check that REGY doesn't die in an insn of the form (set (regx) (plus (regx)...

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* postreload.c (reload_combine): Check that REGY doesn't die in an
insn of the form (set (regx) (plus (regx) (regy))), ie REGX != REGY.

From-SVN: r73148
This commit is contained in:
Richard Earnshaw
2003-10-31 15:11:37 +00:00
committed by Richard Earnshaw
parent 4cabf776b3
commit 71c1543c4b
2 changed files with 9 additions and 1 deletions
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gcc/ChangeLog
+5
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@@ -1,3 +1,8 @@
2003-10-31 Richard Earnshaw <rearnsha@arm.com>
* postreload.c (reload_combine): Check that REGY doesn't die in an
insn of the form (set (regx) (plus (regx) (regy))), ie REGX != REGY.
2003-10-31 Josef Zlomek <zlomekj@suse.cz>
PR/10239
gcc/postreload.c
+4 -1
View File
@@ -718,7 +718,9 @@ reload_combine (void)
... (MEM (PLUS (REGZ) (REGY)))... .
First, check that we have (set (REGX) (PLUS (REGX) (REGY)))
and that we know all uses of REGX before it dies. */
and that we know all uses of REGX before it dies.
Also, explicitly check that REGX != REGY; our life information
does not yet show whether REGY changes in this insn. */
set = single_set (insn);
if (set != NULL_RTX
&& GET_CODE (SET_DEST (set)) == REG
@@ -728,6 +730,7 @@ reload_combine (void)
&& GET_CODE (SET_SRC (set)) == PLUS
&& GET_CODE (XEXP (SET_SRC (set), 1)) == REG
&& rtx_equal_p (XEXP (SET_SRC (set), 0), SET_DEST (set))
&& !rtx_equal_p (XEXP (SET_SRC (set), 1), SET_DEST (set))
&& last_label_ruid < reg_state[REGNO (SET_DEST (set))].use_ruid)
{
rtx reg = SET_DEST (set);