-/* Convert a SET of a hard subreg to a set of the appropriate hard
- register. A subroutine of purge_hard_subreg_sets. */
-
-static void
-purge_single_hard_subreg_set (rtx pattern)
-{
- rtx reg = SET_DEST (pattern);
- enum machine_mode mode = GET_MODE (SET_DEST (pattern));
- int offset = 0;
-
- if (GET_CODE (reg) == SUBREG && REG_P (SUBREG_REG (reg))
- && REGNO (SUBREG_REG (reg)) < FIRST_PSEUDO_REGISTER)
- {
- offset = subreg_regno_offset (REGNO (SUBREG_REG (reg)),
- GET_MODE (SUBREG_REG (reg)),
- SUBREG_BYTE (reg),
- GET_MODE (reg));
- reg = SUBREG_REG (reg);
- }
-
-
- if (REG_P (reg) && REGNO (reg) < FIRST_PSEUDO_REGISTER)
- {
- reg = gen_rtx_REG (mode, REGNO (reg) + offset);
- SET_DEST (pattern) = reg;
- }
-}
-
-/* Eliminate all occurrences of SETs of hard subregs from INSNS. The
- only such SETs that we expect to see are those left in because
- integrate can't handle sets of parts of a return value register.
-
- We don't use alter_subreg because we only want to eliminate subregs
- of hard registers. */
-
-void
-purge_hard_subreg_sets (rtx insn)
-{
- for (; insn; insn = NEXT_INSN (insn))
- {
- if (INSN_P (insn))
- {
- rtx pattern = PATTERN (insn);
- switch (GET_CODE (pattern))
- {
- case SET:
- if (GET_CODE (SET_DEST (pattern)) == SUBREG)
- purge_single_hard_subreg_set (pattern);
- break;
- case PARALLEL:
- {
- int j;
- for (j = XVECLEN (pattern, 0) - 1; j >= 0; j--)
- {
- rtx inner_pattern = XVECEXP (pattern, 0, j);
- if (GET_CODE (inner_pattern) == SET
- && GET_CODE (SET_DEST (inner_pattern)) == SUBREG)
- purge_single_hard_subreg_set (inner_pattern);
- }
- }
- break;
- default:
- break;
- }
- }
- }
-}
-\f