diff options
Diffstat (limited to 'gcc/config/ia64/ia64.c')
| -rw-r--r-- | gcc/config/ia64/ia64.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c index 2eaafc7ca06..8b9e0b01457 100644 --- a/gcc/config/ia64/ia64.c +++ b/gcc/config/ia64/ia64.c @@ -4560,7 +4560,7 @@ static struct group { HARD_REG_SET p_reg_set; HARD_REG_SET gr_reg_conditionally_set; -} last_group[3]; +} last_group[2]; /* Index into the last_group array. */ static int group_idx; @@ -4581,7 +4581,7 @@ errata_find_address_regs (xp, data) x = XEXP (x, 0); if (GET_CODE (x) == REG) { - struct group *prev_group = last_group + (group_idx + 2) % 3; + struct group *prev_group = last_group + (group_idx ^ 1); if (TEST_HARD_REG_BIT (prev_group->gr_reg_conditionally_set, REGNO (x))) return 1; @@ -4598,7 +4598,7 @@ errata_emit_nops (insn) rtx insn; { struct group *this_group = last_group + group_idx; - struct group *prev_group = last_group + (group_idx + 2) % 3; + struct group *prev_group = last_group + (group_idx ^ 1); rtx pat = PATTERN (insn); rtx cond = GET_CODE (pat) == COND_EXEC ? COND_EXEC_TEST (pat) : 0; rtx real_pat = cond ? COND_EXEC_CODE (pat) : pat; @@ -4642,6 +4642,8 @@ errata_emit_nops (insn) && REG_P (SET_DEST (set)) && GET_CODE (SET_SRC (set)) != PLUS && GET_CODE (SET_SRC (set)) != MINUS + && (GET_CODE (SET_SRC (set)) != ASHIFT + || !shladd_operand (XEXP (SET_SRC (set), 1))) && (GET_CODE (SET_SRC (set)) != MEM || GET_CODE (XEXP (SET_SRC (set), 0)) != POST_MODIFY) && GENERAL_REGNO_P (REGNO (SET_DEST (set)))) @@ -4658,6 +4660,8 @@ errata_emit_nops (insn) emit_insn_before (gen_insn_group_barrier (GEN_INT (3)), insn); emit_insn_before (gen_nop (), insn); emit_insn_before (gen_insn_group_barrier (GEN_INT (3)), insn); + group_idx = 0; + memset (last_group, 0, sizeof last_group); } } @@ -4668,17 +4672,23 @@ fixup_errata () { rtx insn; + if (! TARGET_B_STEP) + return; + group_idx = 0; memset (last_group, 0, sizeof last_group); for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) { - if (INSN_P (insn) && ia64_safe_type (insn) == TYPE_S) + if (!INSN_P (insn)) + continue; + + if (ia64_safe_type (insn) == TYPE_S) { - group_idx = (group_idx + 1) % 3; + group_idx ^= 1; memset (last_group + group_idx, 0, sizeof last_group[group_idx]); } - if (TARGET_B_STEP && INSN_P (insn)) + else errata_emit_nops (insn); } } |
