File 2931-beam_ssa_lint-Use-gb_sets-is_empty-1-instead-of-gb_s.patch of Package erlang

From bee24830ce015b780ab9e6d0f90edfde792c072c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Sat, 20 Feb 2021 07:17:55 +0100
Subject: [PATCH 1/6] beam_ssa_lint: Use gb_sets:is_empty/1 instead of
 gb_sets:size/1

---
 lib/compiler/src/beam_ssa_lint.erl | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/compiler/src/beam_ssa_lint.erl b/lib/compiler/src/beam_ssa_lint.erl
index 1c8b0d958e..b518cb823f 100644
--- a/lib/compiler/src/beam_ssa_lint.erl
+++ b/lib/compiler/src/beam_ssa_lint.erl
@@ -291,15 +291,15 @@ vvars_block_1([], _Terminator, State) ->
 vvars_terminator(#b_ret{ arg = Arg }=I, From, State) ->
     ok = vvars_assert_args([Arg], I, State),
     TryTags = State#vvars.try_tags,
-    case gb_sets:size(TryTags) of
-        N when N > 0, From =/= ?EXCEPTION_BLOCK ->
-            throw({active_try_tags_on_return, TryTags, I});
-        N when N > 0, From =:= ?EXCEPTION_BLOCK ->
+    case {gb_sets:is_empty(TryTags),From} of
+        {false,?EXCEPTION_BLOCK} ->
             %% Plain guards sometimes branch off to ?EXCEPTION_BLOCK even
             %% though they cannot actually throw exceptions. This ought to be
             %% fixed at the source, but we'll ignore this for now.
             State;
-        0 ->
+        {false,_} ->
+            throw({active_try_tags_on_return, TryTags, I});
+        {true,_} ->
             State
     end;
 vvars_terminator(#b_switch{arg=Arg,fail=Fail,list=Switch}=I, From, State) ->
-- 
2.26.2