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| author | Michael Matz <matz@suse.de> | 2012-01-26 15:50:33 +0000 |
|---|---|---|
| committer | Michael Matz <matz@gcc.gnu.org> | 2012-01-26 15:50:33 +0000 |
| commit | 81bfd1977ac6a45d790a48603e38d335eb0a8a36 (patch) | |
| tree | 808bb0980b8187c2584ca18d2cc1712638bdbd79 /gcc/tree-eh.c | |
| parent | bfb676c121bba67c943f211af349c836d04226bc (diff) | |
| download | gcc-81bfd1977ac6a45d790a48603e38d335eb0a8a36.zip gcc-81bfd1977ac6a45d790a48603e38d335eb0a8a36.tar.gz gcc-81bfd1977ac6a45d790a48603e38d335eb0a8a36.tar.bz2 | |
re PR tree-optimization/46590 (long compile time with -O2 and many loops)
PR tree-optimization/46590
* cfgexpand.c: Revert last change (r183305).
* gimplify.c (gimplify_bind_expr): Add clobbers for all non-gimple
regs.
* tree-eh.c (cleanup_empty_eh): Try to optimize clobbers before
checking for emptiness.
From-SVN: r183566
Diffstat (limited to 'gcc/tree-eh.c')
| -rw-r--r-- | gcc/tree-eh.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/gcc/tree-eh.c b/gcc/tree-eh.c index 2064d51..521e2f7 100644 --- a/gcc/tree-eh.c +++ b/gcc/tree-eh.c @@ -4056,6 +4056,7 @@ cleanup_empty_eh (eh_landing_pad lp) edge_iterator ei; edge e, e_out; bool has_non_eh_pred; + bool ret = false; int new_lp_nr; /* There can be zero or one edges out of BB. This is the quickest test. */ @@ -4070,6 +4071,16 @@ cleanup_empty_eh (eh_landing_pad lp) default: return false; } + + resx = last_stmt (bb); + if (resx && is_gimple_resx (resx)) + { + if (stmt_can_throw_external (resx)) + optimize_clobbers (bb); + else if (sink_clobbers (bb)) + ret = true; + } + gsi = gsi_after_labels (bb); /* Make sure to skip debug statements. */ @@ -4081,9 +4092,9 @@ cleanup_empty_eh (eh_landing_pad lp) { /* For the degenerate case of an infinite loop bail out. */ if (infinite_empty_loop_p (e_out)) - return false; + return ret; - return cleanup_empty_eh_unsplit (bb, e_out, lp); + return ret | cleanup_empty_eh_unsplit (bb, e_out, lp); } /* The block should consist only of a single RESX statement, modulo a @@ -4096,7 +4107,7 @@ cleanup_empty_eh (eh_landing_pad lp) resx = gsi_stmt (gsi); } if (!is_gimple_resx (resx)) - return false; + return ret; gcc_assert (gsi_one_before_end_p (gsi)); /* Determine if there are non-EH edges, or resx edges into the handler. */ @@ -4172,7 +4183,7 @@ cleanup_empty_eh (eh_landing_pad lp) return true; } - return false; + return ret; succeed: if (dump_file && (dump_flags & TDF_DETAILS)) |