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invoke.texi: Document max-inline-insns-size... 

* doc/invoke.texi: Document max-inline-insns-size,
	uninlined-function-insns, uninlined-function-time,
	uninlined-thunk-insns and uninlined-thunk-time.
	* params.def: Add max-inline-insns-size,
	uninlined-function-insns, uninlined-function-time,
	uninlined-thunk-insns and uninlined-thunk-time.
	* ipa-fnsummary.c (compute_fn_summary, analyze_function_body): Use
	new parameters.
	* ipa-inline.c (can_inline_edge_by_limits_p,
	want_inline_small_function_p): Use new parameters.

From-SVN: r267601
This commit is contained in:
Jan Hubicka 2019-01-05 19:16:55 +01:00 committed by Jan Hubicka
parent 121356b017
commit d06f73a387
5 changed files with 71 additions and 5 deletions
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13
gcc/ChangeLog
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@ -1,3 +1,16 @@
2019-01-05 Jan Hubicka <hubicka@ucw.cz>
* doc/invoke.texi: Document max-inline-insns-size,
uninlined-function-insns, uninlined-function-time,
uninlined-thunk-insns and uninlined-thunk-time.
* params.def: Add max-inline-insns-size,
uninlined-function-insns, uninlined-function-time,
uninlined-thunk-insns and uninlined-thunk-time.
* ipa-fnsummary.c (compute_fn_summary, analyze_function_body): Use
new parameters.
* ipa-inline.c (can_inline_edge_by_limits_p,
want_inline_small_function_p): Use new parameters.
2019-01-05 Jan Hubicka <hubicka@ucw.cz>
* ipa-fnsummary.c (analyze_function_body): Fix accounting of time.

17
gcc/doc/invoke.texi
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@ -11007,6 +11007,23 @@ by the compiler are investigated. To those functions, a different
(more restrictive) limit compared to functions declared inline can
be applied.
@item max-inline-insns-size
This is bound applied to calls which are optimized for size. Small growth
may be desirable to anticipate optimization oppurtunities exposed by inlining.
@item uninlined-function-insns
Number of instructions accounted by inliner for function overhead such as
function prologue and epilogue.
@item uninlined-function-time
Extra time accounted by inliner for function overhead such as time needed to
execute function prologue and epilogue
@item uninlined-thunk-insns
@item uninlined-thunk-time
Same as @option{--param uninlined-function-insns} and
@option{--param uninlined-function-time} but applied to function thunks
@item inline-min-speedup
When estimated performance improvement of caller + callee runtime exceeds this
threshold (in percent), the function can be inlined regardless of the limit on

11
gcc/ipa-fnsummary.c
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@ -2034,7 +2034,10 @@ analyze_function_body (struct cgraph_node *node, bool early)
info->account_size_time (0, 0, bb_predicate, bb_predicate);
bb_predicate = predicate::not_inlined ();
info->account_size_time (2 * ipa_fn_summary::size_scale, 0, bb_predicate,
info->account_size_time (PARAM_VALUE (PARAM_UNINLINED_FUNCTION_INSNS)
* ipa_fn_summary::size_scale,
PARAM_VALUE (PARAM_UNINLINED_FUNCTION_TIME),
bb_predicate,
bb_predicate);
if (fbi.info)
@ -2418,7 +2421,11 @@ compute_fn_summary (struct cgraph_node *node, bool early)
node->local.can_change_signature = false;
es->call_stmt_size = eni_size_weights.call_cost;
es->call_stmt_time = eni_time_weights.call_cost;
info->account_size_time (ipa_fn_summary::size_scale * 2, 2, t, t);
info->account_size_time (ipa_fn_summary::size_scale
* PARAM_VALUE
(PARAM_UNINLINED_FUNCTION_THUNK_INSNS),
PARAM_VALUE
(PARAM_UNINLINED_FUNCTION_THUNK_TIME), t, t);
t = predicate::not_inlined ();
info->account_size_time (2 * ipa_fn_summary::size_scale, 0, t, t);
ipa_update_overall_fn_summary (node);

8
gcc/ipa-inline.c
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@ -523,7 +523,7 @@ can_inline_edge_by_limits_p (struct cgraph_edge *e, bool report,
> opt_for_fn (caller->decl, optimize_size))
{
int growth = estimate_edge_growth (e);
if (growth > 0
if (growth > PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SIZE)
&& (!DECL_DECLARED_INLINE_P (callee->decl)
&& growth >= MAX (MAX_INLINE_INSNS_SINGLE,
MAX_INLINE_INSNS_AUTO)))
@ -635,7 +635,7 @@ want_early_inline_function_p (struct cgraph_edge *e)
int growth = estimate_edge_growth (e);
int n;
if (growth <= 0)
if (growth <= PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SIZE))
;
else if (!e->maybe_hot_p ()
&& growth > 0)
@ -791,7 +791,7 @@ want_inline_small_function_p (struct cgraph_edge *e, bool report)
ipa_hints hints = estimate_edge_hints (e);
int big_speedup = -1; /* compute this lazily */
if (growth <= 0)
if (growth <= PARAM_VALUE (PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SIZE)))
;
/* Apply MAX_INLINE_INSNS_SINGLE limit. Do not do so when
hints suggests that inlining given function is very profitable. */
@ -809,6 +809,8 @@ want_inline_small_function_p (struct cgraph_edge *e, bool report)
want_inline = false;
}
else if (!DECL_DECLARED_INLINE_P (callee->decl)
&& (in_lto_p
&& growth >= PARAM_VALUE (PARAM_EARLY_INLINING_INSNS))
&& !opt_for_fn (e->caller->decl, flag_inline_functions))
{
/* growth_likely_positive is expensive, always test it last. */

27
gcc/params.def
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@ -83,6 +83,33 @@ DEFPARAM (PARAM_MAX_INLINE_INSNS_AUTO,
"The maximum number of instructions when automatically inlining.",
30, 0, 0)
DEFPARAM (PARAM_MAX_INLINE_INSNS_SIZE,
"max-inline-insns-size",
"The maximum number of instructions when inlining for size.",
0, 0, 0)
DEFPARAM (PARAM_UNINLINED_FUNCTION_INSNS,
"uninlined-function-insns",
"Instruction accounted for function prologue, epilogue and other"
" overhead.",
2, 0, 0)
DEFPARAM (PARAM_UNINLINED_FUNCTION_TIME,
"uninlined-function-time",
"Time accounted for function prologue, epilogue and other"
" overhead.",
0, 0, 0)
DEFPARAM (PARAM_UNINLINED_FUNCTION_THUNK_INSNS,
"uninlined-thunk-insns",
"Instruction accounted for function thunk overhead.",
2, 0, 0)
DEFPARAM (PARAM_UNINLINED_FUNCTION_THUNK_TIME,
"uninlined-thunk-time",
"Time accounted for function thunk overhead.",
2, 0, 0)
DEFPARAM (PARAM_MAX_INLINE_INSNS_RECURSIVE,
"max-inline-insns-recursive",
"The maximum number of instructions inline function can grow to via recursive inlining.",