diff options
| author | Björn Gustavsson <[email protected]> | 2016-04-07 05:56:01 +0200 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2016-04-11 13:57:26 +0200 |
| commit | 93c476e258a20899cf6c20fb75e3ebe6f37d5d80 (patch) | |
| tree | f18ac47fff2a3db8169b7b998becfdbe1ca8b82d /lib | |
| parent | 8a659704161705fb838447cb6aa54627e12a8910 (diff) | |
| download | otp-93c476e258a20899cf6c20fb75e3ebe6f37d5d80.tar.gz otp-93c476e258a20899cf6c20fb75e3ebe6f37d5d80.tar.bz2 otp-93c476e258a20899cf6c20fb75e3ebe6f37d5d80.zip | |
Teach beam_utils to check liveness for put_map instructions
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/compiler/src/beam_utils.erl | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/compiler/src/beam_utils.erl b/lib/compiler/src/beam_utils.erl index 68d6105cfa..eed4caf93f 100644 --- a/lib/compiler/src/beam_utils.erl +++ b/lib/compiler/src/beam_utils.erl @@ -484,6 +484,17 @@ check_liveness(R, [{get_map_elements,{f,Fail},S,{list,L}}|Is], St0) -> Other end end; +check_liveness(R, [{put_map,{f,_},_,Src,_D,Live,{list,_}}|_], St0) -> + case R of + Src -> + {used,St0}; + {x,X} when X < Live -> + {used,St0}; + {x,_} -> + {killed,St0}; + {y,_} -> + {unknown,St0} + end; check_liveness(R, [{test_heap,N,Live}|Is], St) -> I = {block,[{set,[],[],{alloc,Live,{nozero,nostack,N,[]}}}]}, check_liveness(R, [I|Is], St); |