From d841a0919f73adca02a1776e65fca4fd8318050d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Thu, 28 Feb 2019 07:30:20 +0100
Subject: Remove the combined instruction is_nonempty_list_test_heap

It turns out that the combination of is_nonempty_list
and test_heap is no longer frequent.
---
 erts/emulator/beam/instrs.tab | 6 ------
 erts/emulator/beam/ops.tab    | 3 ---
 2 files changed, 9 deletions(-)

(limited to 'erts')

diff --git a/erts/emulator/beam/instrs.tab b/erts/emulator/beam/instrs.tab
index 855dcf943a..14ca07f97e 100644
--- a/erts/emulator/beam/instrs.tab
+++ b/erts/emulator/beam/instrs.tab
@@ -666,12 +666,6 @@ is_nonempty_list(Fail, Src) {
     }
 }
 
-is_nonempty_list_test_heap(Fail, Need, Live) {
-    //| -no_prefetch
-    $is_nonempty_list($Fail, x(0));
-    $test_heap($Need, $Live);
-}
-
 is_nonempty_list_allocate(Fail, Src, Need, Live) {
     //| -no_prefetch
     $is_nonempty_list($Fail, $Src);
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab
index a935c3f84a..47a8e566b2 100644
--- a/erts/emulator/beam/ops.tab
+++ b/erts/emulator/beam/ops.tab
@@ -676,13 +676,10 @@ is_list f? y
 
 is_nonempty_list Fail=f S=x | allocate Need Rs => is_nonempty_list_allocate Fail S Need Rs
 
-is_nonempty_list F=f x==0 | test_heap I1 I2 => is_nonempty_list_test_heap F I1 I2
-
 is_nonempty_list Fail=f S=x | get_list S D1=x D2=x => \
   is_nonempty_list_get_list Fail S D1 D2
 
 is_nonempty_list_allocate f? rx t t
-is_nonempty_list_test_heap f? I t
 is_nonempty_list_get_list f? rx x x
 is_nonempty_list f? xy
 
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