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re PR debug/53740 (--enable-checking=yes,rtl bootstrap failure with ada) 

gcc/
	PR debug/53740
	* df.h (dead_debug_add): Remove third argument.
	* df-problems.c (dead_debug_add): Likewise.  Use the REGNO of the
	REG that we want to replace instead.
	(dead_debug_insert_temp): Use the REGNO of the reg that we want
	to replace instead of DF_REF_REGNO.  Require there to always be
	at least one such use.  Check for cases where the same location
	has more than df_ref associated with it.
	(df_note_bb_compute): Remove third dead_debug_add argument.
	* dce.c (word_dce_process_block): Likewise.

From-SVN: r188934
This commit is contained in:
Richard Sandiford 2012-06-25 13:25:39 +00:00 committed by Richard Sandiford
parent 39ce30d841
commit ecf706e5ec
4 changed files with 40 additions and 27 deletions
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13
gcc/ChangeLog
View File

@ -1,3 +1,16 @@
2012-06-25 Richard Sandiford <rdsandiford@googlemail.com>
PR debug/53740
* df.h (dead_debug_add): Remove third argument.
* df-problems.c (dead_debug_add): Likewise. Use the REGNO of the
REG that we want to replace instead.
(dead_debug_insert_temp): Use the REGNO of the reg that we want
to replace instead of DF_REF_REGNO. Require there to always be
at least one such use. Check for cases where the same location
has more than df_ref associated with it.
(df_note_bb_compute): Remove third dead_debug_add argument.
* dce.c (word_dce_process_block): Likewise.
2012-06-25 Steven Bosscher <steven@gcc.gnu.org>
* config/v850/v850.c: Remove redundant extern declarations for

4
gcc/dce.c
View File

@ -848,7 +848,7 @@ word_dce_process_block (basic_block bb, bool redo_out)
== 2 * UNITS_PER_WORD)
&& !bitmap_bit_p (local_live, 2 * DF_REF_REGNO (*use_rec))
&& !bitmap_bit_p (local_live, 2 * DF_REF_REGNO (*use_rec) + 1))
dead_debug_add (&debug, *use_rec, DF_REF_REGNO (*use_rec));
dead_debug_add (&debug, *use_rec);
}
else if (INSN_P (insn))
{
@ -938,7 +938,7 @@ dce_process_block (basic_block bb, bool redo_out, bitmap au)
for (use_rec = DF_INSN_USES (insn); *use_rec; use_rec++)
if (!bitmap_bit_p (local_live, DF_REF_REGNO (*use_rec))
&& !bitmap_bit_p (au, DF_REF_REGNO (*use_rec)))
dead_debug_add (&debug, *use_rec, DF_REF_REGNO (*use_rec));
dead_debug_add (&debug, *use_rec);
}
else if (INSN_P (insn))
{

48
gcc/df-problems.c
View File

@ -3165,10 +3165,10 @@ dead_debug_finish (struct dead_debug *debug, bitmap used)
}
}
/* Add USE to DEBUG. It must be a dead reference to UREGNO in a debug
/* Add USE to DEBUG. It must be a dead reference to a register in a debug
insn. Create a bitmap for DEBUG as needed. */
void
dead_debug_add (struct dead_debug *debug, df_ref use, unsigned int uregno)
dead_debug_add (struct dead_debug *debug, df_ref use)
{
struct dead_debug_use *newddu = XNEW (struct dead_debug_use);
@ -3179,7 +3179,7 @@ dead_debug_add (struct dead_debug *debug, df_ref use, unsigned int uregno)
if (!debug->used)
debug->used = BITMAP_ALLOC (NULL);
bitmap_set_bit (debug->used, uregno);
bitmap_set_bit (debug->used, REGNO (*DF_REF_REAL_LOC (use)));
}
/* If UREGNO is referenced by any entry in DEBUG, emit a debug insn
@ -3201,6 +3201,7 @@ dead_debug_insert_temp (struct dead_debug *debug, unsigned int uregno,
rtx breg;
rtx dval;
rtx bind;
rtx cur_reg;
if (!debug->used || !bitmap_clear_bit (debug->used, uregno))
return 0;
@ -3209,7 +3210,8 @@ dead_debug_insert_temp (struct dead_debug *debug, unsigned int uregno,
the widest referenced mode. */
while ((cur = *tailp))
{
if (DF_REF_REGNO (cur->use) == uregno)
cur_reg = *DF_REF_REAL_LOC (cur->use);
if (REGNO (cur_reg) == uregno)
{
*usesp = cur;
usesp = &cur->next;
@ -3217,21 +3219,13 @@ dead_debug_insert_temp (struct dead_debug *debug, unsigned int uregno,
cur->next = NULL;
if (!reg
|| (GET_MODE_BITSIZE (GET_MODE (reg))
< GET_MODE_BITSIZE (GET_MODE (*DF_REF_REAL_LOC (cur->use)))))
reg = *DF_REF_REAL_LOC (cur->use);
< GET_MODE_BITSIZE (GET_MODE (cur_reg))))
reg = cur_reg;
}
else
tailp = &(*tailp)->next;
}
/* We may have dangling bits in debug->used for registers that were part
of a multi-register use, one component of which has been reset. */
if (reg == NULL)
{
gcc_checking_assert (!uses);
return 0;
}
gcc_checking_assert (uses);
breg = reg;
@ -3340,15 +3334,21 @@ dead_debug_insert_temp (struct dead_debug *debug, unsigned int uregno,
/* Adjust all uses. */
while ((cur = uses))
{
if (GET_MODE (*DF_REF_REAL_LOC (cur->use)) == GET_MODE (reg))
*DF_REF_REAL_LOC (cur->use) = dval;
else
*DF_REF_REAL_LOC (cur->use)
= gen_lowpart_SUBREG (GET_MODE (*DF_REF_REAL_LOC (cur->use)), dval);
/* ??? Should we simplify subreg of subreg? */
if (debug->to_rescan == NULL)
debug->to_rescan = BITMAP_ALLOC (NULL);
bitmap_set_bit (debug->to_rescan, INSN_UID (DF_REF_INSN (cur->use)));
/* If the reference spans multiple hard registers, we'll have
a use for each one. Only change each reference once. */
cur_reg = *DF_REF_REAL_LOC (cur->use);
if (REG_P (cur_reg))
{
if (GET_MODE (cur_reg) == GET_MODE (reg))
*DF_REF_REAL_LOC (cur->use) = dval;
else
*DF_REF_REAL_LOC (cur->use)
= gen_lowpart_SUBREG (GET_MODE (cur_reg), dval);
/* ??? Should we simplify subreg of subreg? */
if (debug->to_rescan == NULL)
debug->to_rescan = BITMAP_ALLOC (NULL);
bitmap_set_bit (debug->to_rescan, INSN_UID (DF_REF_INSN (cur->use)));
}
uses = cur->next;
XDELETE (cur);
}
@ -3547,7 +3547,7 @@ df_note_bb_compute (unsigned int bb_index,
debug insns either. */
if (!bitmap_bit_p (artificial_uses, uregno)
&& !df_ignore_stack_reg (uregno))
dead_debug_add (&debug, use, uregno);
dead_debug_add (&debug, use);
continue;
}
break;

2
gcc/df.h
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@ -1138,7 +1138,7 @@ enum debug_temp_where
extern void dead_debug_init (struct dead_debug *, bitmap);
extern void dead_debug_finish (struct dead_debug *, bitmap);
extern void dead_debug_add (struct dead_debug *, df_ref, unsigned int);
extern void dead_debug_add (struct dead_debug *, df_ref);
extern int dead_debug_insert_temp (struct dead_debug *,
unsigned int uregno, rtx insn,
enum debug_temp_where);