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| author | Richard Kenner <kenner@gcc.gnu.org> | 1996-05-10 18:33:30 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1996-05-10 18:33:30 -0400 |
| commit | cb9e8ad176e75e65cc130c318c4a84922aa98f2a (patch) | |
| tree | 330078c70b65206931b0f8676ecb7d5dc6c02c3f /gcc | |
| parent | d1b0168185c85ebe41859ae9d2bdf9251103f144 (diff) | |
| download | gcc-cb9e8ad176e75e65cc130c318c4a84922aa98f2a.zip gcc-cb9e8ad176e75e65cc130c318c4a84922aa98f2a.tar.gz gcc-cb9e8ad176e75e65cc130c318c4a84922aa98f2a.tar.bz2 | |
(mark_set_1, mark_used_regs): Clean up usages of ALL_NEEDED; change to
SOME_NOT_NEEDED and set properly.
From-SVN: r11967
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/flow.c | 42 |
1 files changed, 21 insertions, 21 deletions
@@ -2006,8 +2006,8 @@ mark_set_1 (needed, dead, x, insn, significant) register int offset = regno / REGSET_ELT_BITS; register REGSET_ELT_TYPE bit = (REGSET_ELT_TYPE) 1 << (regno % REGSET_ELT_BITS); - REGSET_ELT_TYPE all_needed = (needed[offset] & bit); REGSET_ELT_TYPE some_needed = (needed[offset] & bit); + REGSET_ELT_TYPE some_not_needed = (~ needed[offset]) & bit; /* Mark it as a significant register for this basic block. */ if (significant) @@ -2030,17 +2030,17 @@ mark_set_1 (needed, dead, x, insn, significant) n = HARD_REGNO_NREGS (regno, GET_MODE (reg)); while (--n > 0) { + REGSET_ELT_TYPE n_bit + = (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS); + if (significant) - significant[(regno + n) / REGSET_ELT_BITS] - |= (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS); - dead[(regno + n) / REGSET_ELT_BITS] - |= (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS); + significant[(regno + n) / REGSET_ELT_BITS] |= n_bit; + + dead[(regno + n) / REGSET_ELT_BITS] |= n_bit; some_needed - |= (needed[(regno + n) / REGSET_ELT_BITS] - & (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS)); - all_needed - &= (needed[(regno + n) / REGSET_ELT_BITS] - & (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS)); + |= (needed[(regno + n) / REGSET_ELT_BITS] & n_bit); + some_not_needed + |= ((~ needed[(regno + n) / REGSET_ELT_BITS]) & n_bit); } } /* Additional data to record if this is the final pass. */ @@ -2092,7 +2092,7 @@ mark_set_1 (needed, dead, x, insn, significant) reg_live_length[regno]++; } - if (all_needed) + if (! some_not_needed) { /* Make a logical link from the next following insn that uses this register, back to this insn. @@ -2435,10 +2435,11 @@ mark_used_regs (needed, live, x, final, insn) register int offset = regno / REGSET_ELT_BITS; register REGSET_ELT_TYPE bit = (REGSET_ELT_TYPE) 1 << (regno % REGSET_ELT_BITS); - REGSET_ELT_TYPE all_needed = needed[offset] & bit; REGSET_ELT_TYPE some_needed = needed[offset] & bit; + REGSET_ELT_TYPE some_not_needed = (~ needed[offset]) & bit; live[offset] |= bit; + /* A hard reg in a wide mode may really be multiple registers. If so, mark all of them just like the first. */ if (regno < FIRST_PSEUDO_REGISTER) @@ -2479,14 +2480,13 @@ mark_used_regs (needed, live, x, final, insn) n = HARD_REGNO_NREGS (regno, GET_MODE (x)); while (--n > 0) { - live[(regno + n) / REGSET_ELT_BITS] - |= (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS); - some_needed - |= (needed[(regno + n) / REGSET_ELT_BITS] - & (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS)); - all_needed - &= (needed[(regno + n) / REGSET_ELT_BITS] - & (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS)); + REGSET_ELT_TYPE n_bit + = (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS); + + live[(regno + n) / REGSET_ELT_BITS] |= n_bit; + some_needed |= (needed[(regno + n) / REGSET_ELT_BITS] & n_bit); + some_not_needed + |= ((~ needed[(regno + n) / REGSET_ELT_BITS]) & n_bit); } } if (final) @@ -2530,7 +2530,7 @@ mark_used_regs (needed, live, x, final, insn) we do not make a REG_DEAD note; likewise if we already made such a note. */ - if (! all_needed + if (some_not_needed && ! dead_or_set_p (insn, x) #if 0 && (regno >= FIRST_PSEUDO_REGISTER || ! fixed_regs[regno]) |