diff options
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 16 |
1 files changed, 10 insertions, 6 deletions
@@ -5263,11 +5263,13 @@ mark_used_regs (pbi, x, cond, insn) break; case SUBREG: +#ifdef CLASS_CANNOT_CHANGE_MODE if (GET_CODE (SUBREG_REG (x)) == REG && REGNO (SUBREG_REG (x)) >= FIRST_PSEUDO_REGISTER - && (GET_MODE_SIZE (GET_MODE (x)) - != GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))))) - REG_CHANGES_SIZE (REGNO (SUBREG_REG (x))) = 1; + && CLASS_CANNOT_CHANGE_MODE_P (GET_MODE (x), + GET_MODE (SUBREG_REG (x)))) + REG_CHANGES_MODE (REGNO (SUBREG_REG (x))) = 1; +#endif /* While we're here, optimize this case. */ x = SUBREG_REG (x); @@ -5310,12 +5312,14 @@ mark_used_regs (pbi, x, cond, insn) || GET_CODE (testreg) == SIGN_EXTRACT || GET_CODE (testreg) == SUBREG) { +#ifdef CLASS_CANNOT_CHANGE_MODE if (GET_CODE (testreg) == SUBREG && GET_CODE (SUBREG_REG (testreg)) == REG && REGNO (SUBREG_REG (testreg)) >= FIRST_PSEUDO_REGISTER - && (GET_MODE_SIZE (GET_MODE (testreg)) - != GET_MODE_SIZE (GET_MODE (SUBREG_REG (testreg))))) - REG_CHANGES_SIZE (REGNO (SUBREG_REG (testreg))) = 1; + && CLASS_CANNOT_CHANGE_MODE_P (GET_MODE (SUBREG_REG (testreg)), + GET_MODE (testreg))) + REG_CHANGES_MODE (REGNO (SUBREG_REG (testreg))) = 1; +#endif /* Modifying a single register in an alternate mode does not use any of the old value. But these other |