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* [gcc(refs/users/hubicka/heads/honza-gcc-benchmark-branch-v2)] Reduce inlining functions called once
@ 2021-12-03 12:20 Jan Hubicka
0 siblings, 0 replies; only message in thread
From: Jan Hubicka @ 2021-12-03 12:20 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:c9b22c0fb364a3b341ec797cc59ed31c3d5b0851
commit c9b22c0fb364a3b341ec797cc59ed31c3d5b0851
Author: Jan Hubicka <jh@suse.cz>
Date: Fri Dec 3 13:19:53 2021 +0100
Reduce inlining functions called once
Diff:
---
gcc/ipa-inline.c | 47 ++++++++++++++++++++++++++++++-----------------
gcc/params.opt | 8 ++++++++
2 files changed, 38 insertions(+), 17 deletions(-)
diff --git a/gcc/ipa-inline.c b/gcc/ipa-inline.c
index 012b326b5e9..3b3c250534f 100644
--- a/gcc/ipa-inline.c
+++ b/gcc/ipa-inline.c
@@ -1091,20 +1091,30 @@ static bool
check_callers (struct cgraph_node *node, void *has_hot_call)
{
struct cgraph_edge *e;
- for (e = node->callers; e; e = e->next_caller)
- {
- if (!opt_for_fn (e->caller->decl, flag_inline_functions_called_once)
- || !opt_for_fn (e->caller->decl, optimize))
- return true;
- if (!can_inline_edge_p (e, true))
- return true;
- if (e->recursive_p ())
- return true;
- if (!can_inline_edge_by_limits_p (e, true))
- return true;
- if (!(*(bool *)has_hot_call) && e->maybe_hot_p ())
- *(bool *)has_hot_call = true;
- }
+ for (e = node->callers; e; e = e->next_caller)
+ {
+ if (!opt_for_fn (e->caller->decl, flag_inline_functions_called_once)
+ || !opt_for_fn (e->caller->decl, optimize))
+ return true;
+ if (!can_inline_edge_p (e, true))
+ return true;
+ if (e->recursive_p ())
+ return true;
+ if (!can_inline_edge_by_limits_p (e, true))
+ return true;
+ /* Inlining large functions to large loop depth is often harmful because
+ of register pressure it implies. */
+ if ((int)ipa_call_summaries->get (e)->loop_depth
+ > param_inline_functions_called_once_loop_depth)
+ return false;
+ /* Do not produce gigantic functions. */
+ if (estimate_size_after_inlining (e->caller->inlined_to ?
+ e->caller->inlined_to : e->caller, e)
+ > param_inline_functions_called_once_insns)
+ return false;
+ if (!(*(bool *)has_hot_call) && e->maybe_hot_p ())
+ *(bool *)has_hot_call = true;
+ }
return false;
}
@@ -1327,9 +1337,12 @@ edge_badness (struct cgraph_edge *edge, bool dump)
" %i (compensated)\n",
badness.to_double (),
freq.to_double (),
- edge->count.ipa ().initialized_p () ? edge->count.ipa ().to_gcov_type () : -1,
- caller->count.ipa ().initialized_p () ? caller->count.ipa ().to_gcov_type () : -1,
- inlining_speedup (edge, freq, unspec_edge_time, edge_time).to_double (),
+ edge->count.ipa ().initialized_p ()
+ ? edge->count.ipa ().to_gcov_type () : -1,
+ caller->count.ipa ().initialized_p ()
+ ? caller->count.ipa ().to_gcov_type () : -1,
+ inlining_speedup (edge, freq, unspec_edge_time,
+ edge_time).to_double (),
estimate_growth (callee),
callee_info->growth, overall_growth);
}
diff --git a/gcc/params.opt b/gcc/params.opt
index e725c99e5e4..47979f36cc8 100644
--- a/gcc/params.opt
+++ b/gcc/params.opt
@@ -545,6 +545,14 @@ The maximum expansion factor when copying basic blocks.
Common Joined UInteger Var(param_max_hoist_depth) Init(30) Param Optimization
Maximum depth of search in the dominator tree for expressions to hoist.
+-param=max-inline-functions-called-once-loop-depth=
+Common Joined UInteger Var(param_inline_functions_called_once_loop_depth) Init(6) Optimization Param
+Maximum loop depth of a call which is considered for inlining functions called once
+
+-param=max-inline-functions-called-once-insns=
+Common Joined UInteger Var(param_inline_functions_called_once_insns) Init(500) Optimization Param
+Maximum combinaed size of caller and callee wich is inlined if callee is called once.
+
-param=max-inline-insns-auto=
Common Joined UInteger Var(param_max_inline_insns_auto) Init(15) Optimization Param
The maximum number of instructions when automatically inlining.
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