File 5621-beam_types-Improve-meet-2-performance-for-... of Package erlang

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File 5621-beam_types-Improve-meet-2-performance-for-tuples.patch of Package erlang (Revision 1e94e72e3f4fed1ca9cd5c2fd777ed02)

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From 47ea26446117d46267f180a7c2ae5792f70e20d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20H=C3=B6gberg?= <john@erlang.org>
Date: Thu, 21 Apr 2022 14:40:48 +0200
Subject: [PATCH] beam_types: Improve meet/2 performance for tuples

---
 lib/compiler/src/beam_types.erl            |  4 +--
 lib/compiler/test/beam_validator_SUITE.erl | 42 ++++++++++++++++++++--
 2 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/lib/compiler/src/beam_types.erl b/lib/compiler/src/beam_types.erl
index 730af42424..88dd1a8428 100644
--- a/lib/compiler/src/beam_types.erl
+++ b/lib/compiler/src/beam_types.erl
@@ -23,7 +23,7 @@
 -define(BEAM_TYPES_INTERNAL, true).
 -include("beam_types.hrl").
 
--import(lists, [foldl/3, reverse/1]).
+-import(lists, [foldl/3, reverse/1, usort/1]).
 
 -export([meet/1, meet/2, join/1, join/2, subtract/2]).
 
@@ -839,7 +839,7 @@ glb_tuples(#t_tuple{size=Sz1,exact=Ex1,elements=Es1},
     end.
 
 glb_elements(Es1, Es2) ->
-    Keys = maps:keys(Es1) ++ maps:keys(Es2),
+    Keys = usort(maps:keys(Es1) ++ maps:keys(Es2)),
     glb_elements_1(Keys, Es1, Es2, #{}).
 
 glb_elements_1([Key | Keys], Es1, Es2, Acc) ->
diff --git a/lib/compiler/test/beam_validator_SUITE.erl b/lib/compiler/test/beam_validator_SUITE.erl
index 08ebec289f..02e4624fad 100644
--- a/lib/compiler/test/beam_validator_SUITE.erl
+++ b/lib/compiler/test/beam_validator_SUITE.erl
@@ -40,6 +40,7 @@
          receive_marker/1,safe_instructions/1,
          missing_return_type/1,will_bif_succeed/1,
          bs_saved_position_units/1,parent_container/1,
+         container_performance/1,
          not_equal_inference/1]).
 
 -include_lib("common_test/include/ct.hrl").
@@ -75,6 +76,7 @@ groups() ->
        receive_marker,safe_instructions,
        missing_return_type,will_bif_succeed,
        bs_saved_position_units,parent_container,
+       container_performance,
        not_equal_inference]}].
 
 init_per_suite(Config) ->
@@ -962,6 +964,42 @@ pc_1(#pc{a=A}=R) ->
 pc_2(_R) ->
     ok.
 
+%% GH-5915: The following function took an incredibly long time to validate.
+container_performance(Config) ->
+    case Config of
+        ({b,_}) -> {k1};
+        ({a,{b,_}}) -> {k2};
+        ({a,{a,{b,_}}}) -> {k3};
+        ({a,{a,{a,{b,_}}}}) -> {k4};
+        ({a,{a,{a,{a,{b,_}}}}}) -> {k5};
+        ({a,{a,{a,{a,{a,{b,_}}}}}}) -> {k6};
+        ({a,{a,{a,{a,{a,{a,{b,_}}}}}}}) -> {k7};
+        ({a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}) -> {k8};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}) -> {k9};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}) -> {k10};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}) -> {k11};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}) -> {k12};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}) -> {k13};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}) -> {k14};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}) -> {k15};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}) -> {k16};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}) -> {k17};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}) -> {k18};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}) -> {k19};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}}) -> {k20};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}}}) -> {k21};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}}}}) -> {k22};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}}}}}) -> {k23};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}}}}}}) -> {k24};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}}}}}}}) -> {k25};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}}}}}}}}) -> {k26};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}}}}}}}}}) -> {k27};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}}}}}}}}}}) -> {k28};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{b,_}}}}}}}}}}}}}}}}}}}}}}}}}}}}}) -> {k29};
+        ({a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,{a,_}}}}}}}}}}}}}}}}}}}}}}}}}}}}}) -> {k30};
+        _ -> ok
+    end.
+
 %% OTP-18365: A brainfart in inference for '=/=' inverted the results.
 not_equal_inference(_Config) ->
     {'EXIT', {function_clause, _}} = (catch not_equal_inference_1(id([0]))),
-- 
2.34.1

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File 5621-beam_types-Improve-meet-2-performance-for-tuples.patch of Package erlang (Revision 1e94e72e3f4fed1ca9cd5c2fd777ed02)

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