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reload.c (find_valid_class): Accept new argument DEST, choose class accordingly. 

* reload.c (find_valid_class): Accept new argument DEST,
	choose class accordingly.
	(push_reload): Update callers.

From-SVN: r53894
This commit is contained in:
Jan Hubicka 2002-05-26 14:01:40 +02:00 committed by Jan Hubicka
parent ead33da923
commit a65dc37d84
2 changed files with 26 additions and 7 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Sun May 26 14:00:44 CEST 2002 Jan Hubicka <jh@suse.cz>
* reload.c (find_valid_class): Accept new argument DEST,
choose class accordingly.
(push_reload): Update callers.
2002-05-26 Andreas Jaeger <aj@suse.de>
* combine.c (combine_instructions): Do not indent #if for

27
gcc/reload.c
View File

@ -240,7 +240,8 @@ static int push_secondary_reload PARAMS ((int, rtx, int, int, enum reg_class,
enum machine_mode, enum reload_type,
enum insn_code *));
#endif
static enum reg_class find_valid_class PARAMS ((enum machine_mode, int));
static enum reg_class find_valid_class PARAMS ((enum machine_mode, int,
unsigned int));
static int reload_inner_reg_of_subreg PARAMS ((rtx, enum machine_mode));
static void push_replacement PARAMS ((rtx *, int, enum machine_mode));
static void combine_reloads PARAMS ((void));
@ -661,16 +662,20 @@ clear_secondary_mem ()
#endif /* SECONDARY_MEMORY_NEEDED */
/* Find the largest class for which every register number plus N is valid in
M1 (if in range). Abort if no such class exists. */
M1 (if in range) and is cheap to move into REGNO.
Abort if no such class exists. */
static enum reg_class
find_valid_class (m1, n)
find_valid_class (m1, n, dest_regno)
enum machine_mode m1 ATTRIBUTE_UNUSED;
int n;
unsigned int dest_regno;
{
int best_cost = -1;
int class;
int regno;
enum reg_class best_class = NO_REGS;
enum reg_class dest_class = REGNO_REG_CLASS (dest_regno);
unsigned int best_size = 0;
for (class = 1; class < N_REG_CLASSES; class++)
@ -682,8 +687,14 @@ find_valid_class (m1, n)
&& ! HARD_REGNO_MODE_OK (regno + n, m1))
bad = 1;
if (! bad && reg_class_size[class] > best_size)
best_class = class, best_size = reg_class_size[class];
if (! bad && reg_class_size[class] > best_size
&& (best_cost < 0
|| best_cost >= REGISTER_MOVE_COST (m1, class, dest_class)))
{
best_class = class;
best_size = reg_class_size[class];
best_cost = REGISTER_MOVE_COST (m1, class, dest_class);
}
}
if (best_size == 0)
@ -1041,7 +1052,8 @@ push_reload (in, out, inloc, outloc, class,
subreg_regno_offset (REGNO (SUBREG_REG (in)),
GET_MODE (SUBREG_REG (in)),
SUBREG_BYTE (in),
GET_MODE (in)));
GET_MODE (in)),
REGNO (SUBREG_REG (in)));
/* This relies on the fact that emit_reload_insns outputs the
instructions for input reloads of type RELOAD_OTHER in the same
@ -1141,7 +1153,8 @@ push_reload (in, out, inloc, outloc, class,
subreg_regno_offset (REGNO (SUBREG_REG (out)),
GET_MODE (SUBREG_REG (out)),
SUBREG_BYTE (out),
GET_MODE (out))),
GET_MODE (out)),
REGNO (SUBREG_REG (out))),
VOIDmode, VOIDmode, 0, 0,
opnum, RELOAD_OTHER);
}