diff options
Diffstat (limited to 'gcc/lto-streamer.c')
| -rw-r--r-- | gcc/lto-streamer.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/gcc/lto-streamer.c b/gcc/lto-streamer.c index 561ecbc1a7e..a086d918004 100644 --- a/gcc/lto-streamer.c +++ b/gcc/lto-streamer.c @@ -266,12 +266,21 @@ print_lto_report (void) lto_section_name[i], lto_stats.section_size[i]); } +/* We cache a single bitpack assuming that usually at most one is + life. This saves repeated re-allocations. */ +static struct bitpack_d *cached_bp; /* Create a new bitpack. */ struct bitpack_d * bitpack_create (void) { + if (cached_bp) + { + struct bitpack_d *bp = cached_bp; + cached_bp = NULL; + return bp; + } return XCNEW (struct bitpack_d); } @@ -281,6 +290,14 @@ bitpack_create (void) void bitpack_delete (struct bitpack_d *bp) { + if (!cached_bp) + { + bp->num_bits = 0; + bp->first_unused_bit = 0; + VEC_truncate (bitpack_word_t, bp->values, 0); + cached_bp = bp; + return; + } VEC_free (bitpack_word_t, heap, bp->values); free (bp); } @@ -324,7 +341,9 @@ bp_pack_value (struct bitpack_d *bp, bitpack_word_t val, unsigned nbits) bitpack_word_t word; /* We cannot encode more bits than BITS_PER_BITPACK_WORD. */ +#ifdef ENABLE_CHECKING gcc_assert (nbits > 0 && nbits <= BITS_PER_BITPACK_WORD); +#endif /* Compute which word will contain the next NBITS. */ ix = bp_get_next_word (bp, nbits); @@ -334,7 +353,6 @@ bp_pack_value (struct bitpack_d *bp, bitpack_word_t val, unsigned nbits) array, add a new word. Additionally, we should only need to add a single word, since every pack operation cannot use more bits than fit in a single word. */ - gcc_assert (ix < VEC_length (bitpack_word_t, bp->values) + 1); VEC_safe_push (bitpack_word_t, heap, bp->values, 0); } @@ -343,7 +361,6 @@ bp_pack_value (struct bitpack_d *bp, bitpack_word_t val, unsigned nbits) /* To fit VAL in WORD, we need to shift VAL to the left to skip the bottom BP->FIRST_UNUSED_BIT bits. */ - gcc_assert (BITS_PER_BITPACK_WORD >= bp->first_unused_bit + nbits); val <<= bp->first_unused_bit; /* Update WORD with VAL. */ |