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| author | Eric Botcazou <ebotcazou@adacore.com> | 2019-12-18 23:03:23 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2019-12-18 23:03:23 +0000 |
| commit | 11b8091fb33c894cea20702d3e85389723987910 (patch) | |
| tree | 427f71a6fe22d2d9f56e91ff3b27115b1a3c4fb7 | |
| parent | d3769410c65a7d3f2d58402c3ecf5c253e340c2e (diff) | |
| download | gcc-11b8091fb33c894cea20702d3e85389723987910.zip gcc-11b8091fb33c894cea20702d3e85389723987910.tar.gz gcc-11b8091fb33c894cea20702d3e85389723987910.tar.bz2 | |
* ira.c (ira): Use simple LRA algorithm when not optimizing.
From-SVN: r279550
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/ira.c | 36 |
2 files changed, 26 insertions, 14 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index be8dfa3..0f1a0b6 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2019-12-18 Eric Botcazou <ebotcazou@adacore.com> + + * ira.c (ira): Use simple LRA algorithm when not optimizing. + 2019-12-18 Thomas Schwinge <thomas@codesourcery.com> * gimplify.c (gimplify_omp_target_update): Elaborate 'exit data' @@ -5192,8 +5192,6 @@ ira (FILE *f) int ira_max_point_before_emit; bool saved_flag_caller_saves = flag_caller_saves; enum ira_region saved_flag_ira_region = flag_ira_region; - unsigned int i; - int num_used_regs = 0; clear_bb_flags (); @@ -5207,18 +5205,28 @@ ira (FILE *f) /* Perform target specific PIC register initialization. */ targetm.init_pic_reg (); - ira_conflicts_p = optimize > 0; - - /* Determine the number of pseudos actually requiring coloring. */ - for (i = FIRST_PSEUDO_REGISTER; i < DF_REG_SIZE (df); i++) - num_used_regs += !!(DF_REG_USE_COUNT (i) + DF_REG_DEF_COUNT (i)); - - /* If there are too many pseudos and/or basic blocks (e.g. 10K - pseudos and 10K blocks or 100K pseudos and 1K blocks), we will - use simplified and faster algorithms in LRA. */ - lra_simple_p - = (ira_use_lra_p - && num_used_regs >= (1 << 26) / last_basic_block_for_fn (cfun)); + if (optimize) + { + ira_conflicts_p = true; + + /* Determine the number of pseudos actually requiring coloring. */ + unsigned int num_used_regs = 0; + for (unsigned int i = FIRST_PSEUDO_REGISTER; i < DF_REG_SIZE (df); i++) + if (DF_REG_DEF_COUNT (i) || DF_REG_USE_COUNT (i)) + num_used_regs++; + + /* If there are too many pseudos and/or basic blocks (e.g. 10K + pseudos and 10K blocks or 100K pseudos and 1K blocks), we will + use simplified and faster algorithms in LRA. */ + lra_simple_p + = ira_use_lra_p + && num_used_regs >= (1U << 26) / last_basic_block_for_fn (cfun); + } + else + { + ira_conflicts_p = false; + lra_simple_p = ira_use_lra_p; + } if (lra_simple_p) { |