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author | Bernd Schmidt <crux@gcc.gnu.org> | 1999-08-18 17:16:40 +0000 |
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committer | Bernd Schmidt <crux@gcc.gnu.org> | 1999-08-18 17:16:40 +0000 |
commit | 9bb2199881bb29d538aa8a1c2b84703cf36784d9 (patch) | |
tree | eeb8db87eb3d7dbbaecf464dadcdfecaf6f6390e /gcc | |
parent | 3648099b8b44fcb028629dd2c8fff27dfa6d3205 (diff) | |
download | gcc-9bb2199881bb29d538aa8a1c2b84703cf36784d9.zip gcc-9bb2199881bb29d538aa8a1c2b84703cf36784d9.tar.gz gcc-9bb2199881bb29d538aa8a1c2b84703cf36784d9.tar.bz2 |
Indentation fixes
From-SVN: r28751
Diffstat (limited to 'gcc')
-rw-r--r-- | gcc/unroll.c | 116 |
1 files changed, 58 insertions, 58 deletions
diff --git a/gcc/unroll.c b/gcc/unroll.c index c2297f9..c65d101 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -353,7 +353,7 @@ unroll_loop (loop_end, insn_count, loop_start, end_insert_before, return; } else if (loop_info->n_iterations > 0 - && loop_info->n_iterations * insn_count < MAX_UNROLLED_INSNS) + && loop_info->n_iterations * insn_count < MAX_UNROLLED_INSNS) { unroll_number = loop_info->n_iterations; unroll_type = UNROLL_COMPLETELY; @@ -783,71 +783,71 @@ unroll_loop (loop_end, insn_count, loop_start, end_insert_before, /* Mark all local registers, i.e. the ones which are referenced only inside the loop. */ if (INSN_UID (copy_end) < max_uid_for_loop) - { - int copy_start_luid = INSN_LUID (copy_start); - int copy_end_luid = INSN_LUID (copy_end); + { + int copy_start_luid = INSN_LUID (copy_start); + int copy_end_luid = INSN_LUID (copy_end); - /* If a register is used in the jump insn, we must not duplicate it - since it will also be used outside the loop. */ - if (GET_CODE (copy_end) == JUMP_INSN) - copy_end_luid--; + /* If a register is used in the jump insn, we must not duplicate it + since it will also be used outside the loop. */ + if (GET_CODE (copy_end) == JUMP_INSN) + copy_end_luid--; - /* If we have a target that uses cc0, then we also must not duplicate - the insn that sets cc0 before the jump insn. */ + /* If we have a target that uses cc0, then we also must not duplicate + the insn that sets cc0 before the jump insn. */ #ifdef HAVE_cc0 - if (GET_CODE (copy_end) == JUMP_INSN) - copy_end_luid--; + if (GET_CODE (copy_end) == JUMP_INSN) + copy_end_luid--; #endif - /* If copy_start points to the NOTE that starts the loop, then we must - use the next luid, because invariant pseudo-regs moved out of the loop - have their lifetimes modified to start here, but they are not safe - to duplicate. */ - if (copy_start == loop_start) - copy_start_luid++; - - /* If a pseudo's lifetime is entirely contained within this loop, then we - can use a different pseudo in each unrolled copy of the loop. This - results in better code. */ - /* We must limit the generic test to max_reg_before_loop, because only - these pseudo registers have valid regno_first_uid info. */ - for (j = FIRST_PSEUDO_REGISTER; j < max_reg_before_loop; ++j) - if (REGNO_FIRST_UID (j) > 0 && REGNO_FIRST_UID (j) <= max_uid_for_loop - && uid_luid[REGNO_FIRST_UID (j)] >= copy_start_luid - && REGNO_LAST_UID (j) > 0 && REGNO_LAST_UID (j) <= max_uid_for_loop - && uid_luid[REGNO_LAST_UID (j)] <= copy_end_luid) + /* If copy_start points to the NOTE that starts the loop, then we must + use the next luid, because invariant pseudo-regs moved out of the loop + have their lifetimes modified to start here, but they are not safe + to duplicate. */ + if (copy_start == loop_start) + copy_start_luid++; + + /* If a pseudo's lifetime is entirely contained within this loop, then we + can use a different pseudo in each unrolled copy of the loop. This + results in better code. */ + /* We must limit the generic test to max_reg_before_loop, because only + these pseudo registers have valid regno_first_uid info. */ + for (j = FIRST_PSEUDO_REGISTER; j < max_reg_before_loop; ++j) + if (REGNO_FIRST_UID (j) > 0 && REGNO_FIRST_UID (j) <= max_uid_for_loop + && uid_luid[REGNO_FIRST_UID (j)] >= copy_start_luid + && REGNO_LAST_UID (j) > 0 && REGNO_LAST_UID (j) <= max_uid_for_loop + && uid_luid[REGNO_LAST_UID (j)] <= copy_end_luid) + { + /* However, we must also check for loop-carried dependencies. + If the value the pseudo has at the end of iteration X is + used by iteration X+1, then we can not use a different pseudo + for each unrolled copy of the loop. */ + /* A pseudo is safe if regno_first_uid is a set, and this + set dominates all instructions from regno_first_uid to + regno_last_uid. */ + /* ??? This check is simplistic. We would get better code if + this check was more sophisticated. */ + if (set_dominates_use (j, REGNO_FIRST_UID (j), REGNO_LAST_UID (j), + copy_start, copy_end)) + local_regno[j] = 1; + + if (loop_dump_stream) + { + if (local_regno[j]) + fprintf (loop_dump_stream, "Marked reg %d as local\n", j); + else + fprintf (loop_dump_stream, "Did not mark reg %d as local\n", + j); + } + } + /* Givs that have been created from multiple biv increments always have + local registers. */ + for (j = first_increment_giv; j <= last_increment_giv; j++) { - /* However, we must also check for loop-carried dependencies. - If the value the pseudo has at the end of iteration X is - used by iteration X+1, then we can not use a different pseudo - for each unrolled copy of the loop. */ - /* A pseudo is safe if regno_first_uid is a set, and this - set dominates all instructions from regno_first_uid to - regno_last_uid. */ - /* ??? This check is simplistic. We would get better code if - this check was more sophisticated. */ - if (set_dominates_use (j, REGNO_FIRST_UID (j), REGNO_LAST_UID (j), - copy_start, copy_end)) - local_regno[j] = 1; - + local_regno[j] = 1; if (loop_dump_stream) - { - if (local_regno[j]) - fprintf (loop_dump_stream, "Marked reg %d as local\n", j); - else - fprintf (loop_dump_stream, "Did not mark reg %d as local\n", - j); - } + fprintf (loop_dump_stream, "Marked reg %d as local\n", j); } - /* Givs that have been created from multiple biv increments always have - local registers. */ - for (j = first_increment_giv; j <= last_increment_giv; j++) - { - local_regno[j] = 1; - if (loop_dump_stream) - fprintf (loop_dump_stream, "Marked reg %d as local\n", j); - } - } + } /* If this loop requires exit tests when unrolled, check to see if we can precondition the loop so as to make the exit tests unnecessary. |