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| author | Bernd Schmidt <bernds@codesourcery.com> | 2012-05-14 12:08:31 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2012-05-14 12:08:31 +0000 |
| commit | e384e6b59c074ac936f0f3212ca33fe40f3d82f5 (patch) | |
| tree | f9965bd4902a6a182ee0908a0ebd8e8bbd34a1cf /gcc/ira-costs.c | |
| parent | 92290a187e25ed1b21ff99de259421e7b540349e (diff) | |
| download | gcc-e384e6b59c074ac936f0f3212ca33fe40f3d82f5.zip gcc-e384e6b59c074ac936f0f3212ca33fe40f3d82f5.tar.gz gcc-e384e6b59c074ac936f0f3212ca33fe40f3d82f5.tar.bz2 | |
attribs.c (decl_attributes): Avoid emitting a warning if ATTR_FLAG_BUILT_IN.
* attribs.c (decl_attributes): Avoid emitting a warning if
ATTR_FLAG_BUILT_IN.
* doc/rtl.texi (CALL_INSN_FUNCTION_USAGE): Use lowercase for rtx
codes. Document meaning of sets inside CALL_INSN_FUNCTION_USAGE.
* c-family/c-common.c (DEF_ATTR_STRING): Define and undefine as
necessary.
* builtin-attrs.def (DEF_ATTR_FOR_STRING): Define. Use it to
define a string "1".
(ATTR_RET1_NOTHROW_NONNULL_LEAF): New attr definition.
* builtins.def (BUILT_IN_MEMCPY, BUILT_IN_MEMMOVE, BUILT_IN_MEMSET,
BUILT_IN_STRCPY): Use it for these functions.
* postreload.c (reload_combine): Deal with SETs inside
CALL_INSN_FUNCTION_USAGE.
* caller-save.c (setup_save_areas, save_call_clobbered_regs):
Look for REG_RETURNED notes and use a cheap restore if possible.
* ira-int.h (struct ira_allocno): New member cheap_calls_crossed_num.
(ALLOCNO_CHEAP_CALLS_CROSSED_NUM): New macro.
* ira-build.c (ira_create_allocno, create_cap_allocno,
propagate_allocno_info, propagate_some_info_from_allocno,
copy_info_to_removed_store_destination, ira_flattening): Handle it.
* ira-lives.c (pseudo_regno_single_word_and_live_p,
find_call_crossed_cheap_reg): New static functions.
(process_bb_node_lives): Look for SETs in CALL_INSN_FUNCTION_USAGE,
and set ALLOCNO_CHEAP_CALLS_CROSSED_NUM if possible. Also make
a REG_RETURNED note in that case.
* ira.c (setup_reg_renumber): Change assert to allow cases where
allocnos only cross calls for which they are cheap to restore.
* ira-costs.c (ira_tune_allocno_costs): Compare
ALLOCNO_CALLS_CROSSED_NUM to ALLOCNO_CHEAP_CALLS_CROSSED_NUM rather
than 0.
* reg-notes.def (REG_RETURNED): New note.
* cse.c (cse_insn): Likewise.
* sched-deps.c (sched_analyze_insn): Likewise.
* expr.c (init_block_move_fn): Set a "fn spec" attribute.
* calls.c (decl_return_flags): New static function.
(expand_call): Generate a SET in CALL_INSN_FUNCTION_USAGE for
functions that return one of their arguments.
* lto/lto-lang.c (handle_fnspec_attribute): New static function.
(lto_attribute_table): Add "fn spec".
(DEF_ATTR_STRING): Define and undefine along with the other macros.
* regcprop.c (struct kill_set_value_data): New.
(kill_set_value): Interpret data as a pointer to such a struct.
Do nothing if the caller wants the register to be ignored.
(copyprop_hardreg_forward_1): Handle SETs in CALL_INSN_FUNCTION_USAGE.
testsuite/
* gcc.target/i386/retarg.c: New test.
From-SVN: r187459
Diffstat (limited to 'gcc/ira-costs.c')
| -rw-r--r-- | gcc/ira-costs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/ira-costs.c b/gcc/ira-costs.c index 1199763..5d06194 100644 --- a/gcc/ira-costs.c +++ b/gcc/ira-costs.c @@ -2107,7 +2107,8 @@ ira_tune_allocno_costs (void) mode = ALLOCNO_MODE (a); n = ira_class_hard_regs_num[aclass]; min_cost = INT_MAX; - if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0) + if (ALLOCNO_CALLS_CROSSED_NUM (a) + != ALLOCNO_CHEAP_CALLS_CROSSED_NUM (a)) { ira_allocate_and_set_costs (&ALLOCNO_HARD_REG_COSTS (a), aclass, |