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| author | Richard Biener <rguenther@suse.de> | 2014-01-17 10:47:59 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2014-01-17 10:47:59 +0000 |
| commit | 7be64667c127a0cdb9dc7e4f02dcd7720589919d (patch) | |
| tree | 87501164890f5046ea55327b6647afe5ac2c9e28 /gcc/loop-invariant.c | |
| parent | cc3a9f0d477d52982b504c954da0d87d48e6c1f7 (diff) | |
| download | gcc-7be64667c127a0cdb9dc7e4f02dcd7720589919d.zip gcc-7be64667c127a0cdb9dc7e4f02dcd7720589919d.tar.gz gcc-7be64667c127a0cdb9dc7e4f02dcd7720589919d.tar.bz2 | |
re PR rtl-optimization/38518 (Excessive compile time with -O3)
2014-01-17 Richard Biener <rguenther@suse.de>
PR rtl-optimization/38518
* df.h (df_analyze_loop): Declare.
* df-core.c: Include cfgloop.h.
(df_analyze_1): Split out main part of df_analyze.
(df_analyze): Adjust.
(loop_inverted_post_order_compute): New function.
(loop_post_order_compute): Likewise.
(df_analyze_loop): New function avoiding whole-function
postorder computes.
* loop-invariant.c (find_defs): Use df_analyze_loop.
(find_invariants): Adjust.
* loop-iv.c (iv_analysis_loop_init): Use df_analyze_loop.
From-SVN: r206702
Diffstat (limited to 'gcc/loop-invariant.c')
| -rw-r--r-- | gcc/loop-invariant.c | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/gcc/loop-invariant.c b/gcc/loop-invariant.c index b31b926..100a2c1 100644 --- a/gcc/loop-invariant.c +++ b/gcc/loop-invariant.c @@ -652,14 +652,8 @@ may_assign_reg_p (rtx x) BODY. */ static void -find_defs (struct loop *loop, basic_block *body) +find_defs (struct loop *loop) { - unsigned i; - bitmap blocks = BITMAP_ALLOC (NULL); - - for (i = 0; i < loop->num_nodes; i++) - bitmap_set_bit (blocks, body[i]->index); - if (dump_file) { fprintf (dump_file, @@ -670,9 +664,8 @@ find_defs (struct loop *loop, basic_block *body) df_remove_problem (df_chain); df_process_deferred_rescans (); df_chain_add_problem (DF_UD_CHAIN); - df_set_blocks (blocks); df_set_flags (DF_RD_PRUNE_DEAD_DEFS); - df_analyze (); + df_analyze_loop (loop); check_invariant_table_size (); if (dump_file) @@ -682,8 +675,6 @@ find_defs (struct loop *loop, basic_block *body) "*****ending processing of loop %d ******\n", loop->num); } - - BITMAP_FREE (blocks); } /* Creates a new invariant for definition DEF in INSN, depending on invariants @@ -1005,7 +996,7 @@ find_invariants (struct loop *loop) compute_always_reached (loop, body, may_exit, always_reached); compute_always_reached (loop, body, has_exit, always_executed); - find_defs (loop, body); + find_defs (loop); find_invariants_body (loop, body, always_reached, always_executed); merge_identical_invariants (); |