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(find_dummy_reload): New args inmode, outmode. 

(find_reloads): Pass new args.
(push_reload): Likewise.

From-SVN: r5319
This commit is contained in:
Richard Stallman 1993-09-14 16:39:28 +00:00
parent da57b63af9
commit 36b505688d
1 changed files with 21 additions and 9 deletions
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30
gcc/reload.c
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@ -267,6 +267,7 @@ static int push_reload PROTO((rtx, rtx, rtx *, rtx *, enum reg_class,
static void push_replacement PROTO((rtx *, int, enum machine_mode));
static void combine_reloads PROTO((void));
static rtx find_dummy_reload PROTO((rtx, rtx, rtx *, rtx *,
enum machine_mode, enum machine_mode,
enum reg_class, int));
static int hard_reg_set_here_p PROTO((int, int, rtx));
static struct decomposition decompose PROTO((rtx));
@ -1294,6 +1295,7 @@ push_reload (in, out, inloc, outloc, class,
if (in != 0 && out != 0 && in != out && reload_reg_rtx[i] == 0)
{
reload_reg_rtx[i] = find_dummy_reload (in, out, inloc, outloc,
inmode, outmode,
reload_reg_class[i], i);
/* If the outgoing register already contains the same value
@ -1591,9 +1593,11 @@ combine_reloads ()
is just to see if a register can be found, not to find and install it. */
static rtx
find_dummy_reload (real_in, real_out, inloc, outloc, class, for_real)
find_dummy_reload (real_in, real_out, inloc, outloc,
inmode, outmode, class, for_real)
rtx real_in, real_out;
rtx *inloc, *outloc;
enum machine_mode inmode, outmode;
enum reg_class class;
int for_real;
{
@ -1605,9 +1609,9 @@ find_dummy_reload (real_in, real_out, inloc, outloc, class, for_real)
/* If operands exceed a word, we can't use either of them
unless they have the same size. */
if (GET_MODE_SIZE (GET_MODE (real_out)) != GET_MODE_SIZE (GET_MODE (real_in))
&& (GET_MODE_SIZE (GET_MODE (real_out)) > UNITS_PER_WORD
|| GET_MODE_SIZE (GET_MODE (real_in)) > UNITS_PER_WORD))
if (GET_MODE_SIZE (outmode) != GET_MODE_SIZE (inmode)
&& (GET_MODE_SIZE (outmode) > UNITS_PER_WORD
|| GET_MODE_SIZE (inmode) > UNITS_PER_WORD))
return 0;
/* Find the inside of any subregs. */
@ -1631,7 +1635,7 @@ find_dummy_reload (real_in, real_out, inloc, outloc, class, for_real)
&& REGNO (out) < FIRST_PSEUDO_REGISTER)
{
register int regno = REGNO (out) + out_offset;
int nwords = HARD_REGNO_NREGS (regno, GET_MODE (real_out));
int nwords = HARD_REGNO_NREGS (regno, outmode);
rtx saved_rtx;
/* When we consider whether the insn uses OUT,
@ -1666,7 +1670,7 @@ find_dummy_reload (real_in, real_out, inloc, outloc, class, for_real)
if (GET_CODE (real_out) == REG)
value = real_out;
else
value = gen_rtx (REG, GET_MODE (real_out), regno);
value = gen_rtx (REG, outmode, regno);
}
}
@ -1685,10 +1689,16 @@ find_dummy_reload (real_in, real_out, inloc, outloc, class, for_real)
|| find_reg_note (this_insn, REG_UNUSED, real_out))
&& find_reg_note (this_insn, REG_DEAD, real_in)
&& !fixed_regs[REGNO (in)]
&& HARD_REGNO_MODE_OK (REGNO (in), GET_MODE (out)))
&& HARD_REGNO_MODE_OK (REGNO (in),
/* The only case where out and real_out might
have different modes is where real_out
is a subreg, and in that case, out
has a real mode. */
(GET_MODE (out) != VOIDmode
? GET_MODE (out) : outmode)))
{
register int regno = REGNO (in) + in_offset;
int nwords = HARD_REGNO_NREGS (regno, GET_MODE (real_in));
int nwords = HARD_REGNO_NREGS (regno, inmode);
if (! refers_to_regno_for_reload_p (regno, regno + nwords, out, NULL_PTR)
&& ! hard_reg_set_here_p (regno, regno + nwords,
@ -1710,7 +1720,7 @@ find_dummy_reload (real_in, real_out, inloc, outloc, class, for_real)
if (GET_CODE (real_in) == REG)
value = real_in;
else
value = gen_rtx (REG, GET_MODE (real_in), regno);
value = gen_rtx (REG, inmode, regno);
}
}
}
@ -2690,6 +2700,8 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p)
value
= find_dummy_reload (recog_operand[i], recog_operand[c],
recog_operand_loc[i], recog_operand_loc[c],
insn_operand_mode[insn_code_number][i],
insn_operand_mode[insn_code_number][c],
this_alternative[c], -1);
if (value != 0)