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re PR rtl-optimization/7630 (gcc 3.2 breaks on Mozilla 1.0's JS sources with -march=pentium4) 

PR opt/7630
	* reload.c (reload_inner_reg_of_subreg): New argument output;
	(push_reload): Update call.

From-SVN: r58248
This commit is contained in:
Jan Hubicka 2002-10-17 15:13:10 +00:00
parent ccc4bdea16
commit 4bf1d92ee0
1 changed files with 8 additions and 5 deletions
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13
gcc/reload.c
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@ -242,7 +242,7 @@ static int push_secondary_reload PARAMS ((int, rtx, int, int, enum reg_class,
#endif
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 int reload_inner_reg_of_subreg PARAMS ((rtx, enum machine_mode, int));
static void push_replacement PARAMS ((rtx *, int, enum machine_mode));
static void dup_replacements PARAMS ((rtx *, rtx *));
static void combine_reloads PARAMS ((void));
@ -795,9 +795,10 @@ find_reusable_reload (p_in, out, class, type, opnum, dont_share)
SUBREG_REG expression. */
static int
reload_inner_reg_of_subreg (x, mode)
reload_inner_reg_of_subreg (x, mode, output)
rtx x;
enum machine_mode mode;
int output;
{
rtx inner;
@ -825,6 +826,7 @@ reload_inner_reg_of_subreg (x, mode)
word and the number of regs for INNER is not the same as the
number of words in INNER, then INNER will need reloading. */
return (GET_MODE_SIZE (mode) <= UNITS_PER_WORD
&& output
&& GET_MODE_SIZE (GET_MODE (inner)) > UNITS_PER_WORD
&& ((GET_MODE_SIZE (GET_MODE (inner)) / UNITS_PER_WORD)
!= (int) HARD_REGNO_NREGS (REGNO (inner), GET_MODE (inner))));
@ -1048,7 +1050,7 @@ push_reload (in, out, inloc, outloc, class,
/* Similar issue for (SUBREG constant ...) if it was not handled by the
code above. This can happen if SUBREG_BYTE != 0. */
if (in != 0 && reload_inner_reg_of_subreg (in, inmode))
if (in != 0 && reload_inner_reg_of_subreg (in, inmode, 0))
{
enum reg_class in_class = class;
@ -1145,7 +1147,7 @@ push_reload (in, out, inloc, outloc, class,
However, we must reload the inner reg *as well as* the subreg in
that case. In this case, the inner reg is an in-out reload. */
if (out != 0 && reload_inner_reg_of_subreg (out, outmode))
if (out != 0 && reload_inner_reg_of_subreg (out, outmode, 1))
{
/* This relies on the fact that emit_reload_insns outputs the
instructions for output reloads of type RELOAD_OTHER in reverse
@ -1733,7 +1735,8 @@ combine_reloads ()
&& ! (GET_CODE (rld[i].in) == REG
&& reg_overlap_mentioned_for_reload_p (rld[i].in,
rld[output_reload].out))))
&& ! reload_inner_reg_of_subreg (rld[i].in, rld[i].inmode)
&& ! reload_inner_reg_of_subreg (rld[i].in, rld[i].inmode,
rld[i].when_needed != RELOAD_FOR_INPUT)
&& (reg_class_size[(int) rld[i].class]
|| SMALL_REGISTER_CLASSES)
/* We will allow making things slightly worse by combining an