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[PR113526][LRA]: Fixing asm-flag-1.c failure on ARM

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My recent patch for PR113356 results in failure asm-flag-1.c test on arm.
After the patch LRA treats asm operand pseudos as general regs.  There
are too many such operands and LRA can not assign hard regs to all
operand pseudos.  Actually we should not assign hard regs to the
operand pseudo at all.  The following patch fixes this.

gcc/ChangeLog:

	PR target/113526
	* lra-constraints.cc (curr_insn_transform): Change class even for
	spilled pseudo successfully matched with with NO_REGS.
This commit is contained in:
Vladimir N. Makarov 2024-01-25 14:41:17 -05:00
parent ffeab69e1f
commit 476226290d
1 changed files with 2 additions and 2 deletions
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4
gcc/lra-constraints.cc
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@ -4498,10 +4498,10 @@ curr_insn_transform (bool check_only_p)
registers for other pseudos referenced in the insn. The most
common case of this is a scratch register which will be
transformed to scratch back at the end of LRA. */
&& lra_get_regno_hard_regno (regno) >= 0
&& bitmap_single_bit_set_p (&lra_reg_info[regno].insn_bitmap))
{
lra_change_class (regno, NO_REGS, " Change to", true);
if (lra_get_allocno_class (regno) != NO_REGS)
lra_change_class (regno, NO_REGS, " Change to", true);
reg_renumber[regno] = -1;
}
/* We can do an optional reload. If the pseudo got a hard