From f2d068bb92b49360e04c7150a643f1f9026c288d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Fri, 8 Apr 2016 20:38:35 +0200 Subject: Use the register map in %live in beam_utils:is_killed_block/2 In 1f0ae04d374, a complete register map was introduced in the %live instructions thar are added by beam_utils:live_opt/1. Use the register map to improve beam_utils:is_killed_block/2. --- lib/compiler/src/beam_utils.erl | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'lib/compiler') diff --git a/lib/compiler/src/beam_utils.erl b/lib/compiler/src/beam_utils.erl index eed4caf93f..fdd0020261 100644 --- a/lib/compiler/src/beam_utils.erl +++ b/lib/compiler/src/beam_utils.erl @@ -581,9 +581,9 @@ check_killed_block(R, [{set,Ds,Ss,_Op}|Is]) -> false -> check_killed_block(R, Is) end end; -check_killed_block(R, [{'%live',Live,_}|Is]) -> +check_killed_block(R, [{'%live',_,Regs}|Is]) -> case R of - {x,X} when X >= Live -> killed; + {x,X} when (Regs bsr X) band 1 =:= 0 -> killed; _ -> check_killed_block(R, Is) end; check_killed_block(_, []) -> transparent. -- cgit v1.2.3