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

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.

diff --git a/gcc/lra-constraints.cc b/gcc/lra-constraints.cc
index 3379b88ff22e4d1a2a5a5dfdaa39ad555706936a..0ae81c1ff9cb8b44ac84787f13b6502c2216ddec 100644 (file)
--- a/gcc/lra-constraints.cc
+++ b/gcc/lra-constraints.cc
@@ -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