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hppa: Don't allow large modes in hard registers

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LRA has problems handling spills for OI and TI modes.  There are
issues with SUBREG support as well.

This change fixes gcc.c-torture/compile/pr92618.c with LRA.

2024-11-08  John David Anglin  <danglin@gcc.gnu.org>

gcc/ChangeLog:

	PR target/117238
	* config/pa/pa32-regs.h (PA_HARD_REGNO_MODE_OK): Don't allow
	mode size 32.  Limit mode size 16 in general registers to
	complex modes.
This commit is contained in:
John David Anglin 2024-11-08 16:49:34 -05:00
parent 1ea45291af
commit 3a1da8ffb7
1 changed files with 6 additions and 9 deletions
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15
gcc/config/pa/pa32-regs.h
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@ -187,10 +187,9 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
that includes the incoming arguments and the return value. We specify a
set with no overlaps so that we don't have to specify that the destination
register is an early clobber in patterns using this mode. Except for the
return value, the starting registers are odd. For 128 and 256 bit modes,
we similarly specify non-overlapping sets of cpu registers. However,
there aren't any patterns defined for modes larger than 64 bits at the
moment.
return value, the starting registers are odd. Except for complex modes,
we don't allow modes larger than 64 bits in the general registers as there
are issues with copies, spills and SUBREG support.
We limit the modes allowed in the floating point registers to the
set of modes used in the machine definition. In addition, we allow
@ -217,15 +216,13 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
? (VALID_FP_MODE_P (MODE) \
&& (GET_MODE_SIZE (MODE) <= 4 \
|| (GET_MODE_SIZE (MODE) == 8 && ((REGNO) & 1) == 0) \
|| (GET_MODE_SIZE (MODE) == 16 && ((REGNO) & 3) == 0) \
|| (GET_MODE_SIZE (MODE) == 32 && ((REGNO) & 7) == 0))) \
|| (GET_MODE_SIZE (MODE) == 16 && ((REGNO) & 3) == 0))) \
: (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD \
|| (GET_MODE_SIZE (MODE) == 2 * UNITS_PER_WORD \
&& ((((REGNO) & 1) == 1 && (REGNO) <= 25) || (REGNO) == 28)) \
|| (GET_MODE_SIZE (MODE) == 4 * UNITS_PER_WORD \
&& ((REGNO) & 3) == 3 && (REGNO) <= 23) \
|| (GET_MODE_SIZE (MODE) == 8 * UNITS_PER_WORD \
&& ((REGNO) & 7) == 3 && (REGNO) <= 19)))
&& COMPLEX_MODE_P (MODE) \
&& ((REGNO) & 3) == 3 && (REGNO) <= 23)))
/* How to renumber registers for gdb.