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reload.c (find_reloads_subreg_address): Do not require validity of address in original mode before reloading address. 

* reload.c (find_reloads_subreg_address): Do not require validity
	of address in original mode before reloading address.

From-SVN: r137639
This commit is contained in:
Joseph Myers 2008-07-08 21:23:56 +01:00 committed by Joseph Myers
parent 87bd23b8e9
commit 10932211a8
2 changed files with 8 additions and 3 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2008-07-08 Joseph Myers <joseph@codesourcery.com>
* reload.c (find_reloads_subreg_address): Do not require validity
of address in original mode before reloading address.
2008-07-07 Tianwei Sheng <tianweis@google.com>
* df-core.c (df_remove_problem): Adjust the access to avoid out of

6
gcc/reload.c
View File

@ -6049,7 +6049,6 @@ find_reloads_subreg_address (rtx x, int force_replace, int opnum,
unsigned inner_size = GET_MODE_SIZE (GET_MODE (SUBREG_REG (x)));
int offset;
rtx orig = tem;
enum machine_mode orig_mode = GET_MODE (orig);
int reloaded;
/* For big-endian paradoxical subregs, SUBREG_BYTE does not
@ -6095,7 +6094,9 @@ find_reloads_subreg_address (rtx x, int force_replace, int opnum,
/* For some processors an address may be valid in the
original mode but not in a smaller mode. For
example, ARM accepts a scaled index register in
SImode but not in HImode. find_reloads_address
SImode but not in HImode. Similarly, the address may
have been valid before the subreg offset was added,
but not afterwards. find_reloads_address
assumes that we pass it a valid address, and doesn't
force a reload. This will probably be fine if
find_reloads_address finds some reloads. But if it
@ -6103,7 +6104,6 @@ find_reloads_subreg_address (rtx x, int force_replace, int opnum,
valid address into an invalid one. Check for that
here. */
if (reloaded != 1
&& strict_memory_address_p (orig_mode, XEXP (tem, 0))
&& !strict_memory_address_p (GET_MODE (tem),
XEXP (tem, 0)))
push_reload (XEXP (tem, 0), NULL_RTX, &XEXP (tem, 0), (rtx*) 0,