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| author | Jeff Law <law@redhat.com> | 2002-06-14 10:25:36 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2002-06-14 10:25:36 -0600 |
| commit | 99a15921f00b8d3956a66a39bc98c57893a665f0 (patch) | |
| tree | 72e1faa1b66f9c943d6e2c2fa17de7b0761bbfca /gcc/toplev.c | |
| parent | e56c446321eafc7f19e1d7cd0ef0fa2bdfe40b5f (diff) | |
| download | gcc-99a15921f00b8d3956a66a39bc98c57893a665f0.zip gcc-99a15921f00b8d3956a66a39bc98c57893a665f0.tar.gz gcc-99a15921f00b8d3956a66a39bc98c57893a665f0.tar.bz2 | |
gcse.c (delete_null_pointer_checks_1): Inform caller if any null pointer checks were eliminated.
* gcse.c (delete_null_pointer_checks_1): Inform caller if any
null pointer checks were eliminated. Update prototype.
(delete_null_pointer_checks): Similarly.
* rtl.h (delete_null_pointer_checks): Update prototype.
* toplev.c (rest_of_compilation): Only run cleanup_cfg if
delete_null_pointer_checks deletes one or more null
pointer checks. Do not run cleanup_cfg before gcse, the
CFG is accurate and optimized at that point..
From-SVN: r54617
Diffstat (limited to 'gcc/toplev.c')
| -rw-r--r-- | gcc/toplev.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/gcc/toplev.c b/gcc/toplev.c index c878d57..7965059 100644 --- a/gcc/toplev.c +++ b/gcc/toplev.c @@ -2729,9 +2729,9 @@ rest_of_compilation (decl) if (rtl_dump_file) dump_flow_info (rtl_dump_file); - delete_null_pointer_checks (insns); + if (delete_null_pointer_checks (insns)) + cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP); - cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP); close_dump_file (DFI_null, print_rtl_with_bb, insns); } @@ -2775,13 +2775,13 @@ rest_of_compilation (decl) if (tem || optimize > 1) cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP); /* Try to identify useless null pointer tests and delete them. */ - if (flag_delete_null_pointer_checks || flag_thread_jumps) + if (flag_delete_null_pointer_checks) { timevar_push (TV_JUMP); if (flag_delete_null_pointer_checks) - delete_null_pointer_checks (insns); - /* CFG is no longer maintained up-to-date. */ + if (delete_null_pointer_checks (insns)) + cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP); timevar_pop (TV_JUMP); } @@ -2814,7 +2814,6 @@ rest_of_compilation (decl) timevar_push (TV_GCSE); open_dump_file (DFI_gcse, decl); - cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP); tem = gcse_main (insns, rtl_dump_file); rebuild_jump_labels (insns); delete_trivially_dead_insns (insns, max_reg_num ()); |