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| author | Björn Gustavsson <bjorn@erlang.org> | 2016-05-23 20:13:48 +0200 |
|---|---|---|
| committer | Björn Gustavsson <bjorn@erlang.org> | 2016-09-21 14:07:53 +0200 |
| commit | 01835845579e9f0a8da3574864747cd3ba10db6e (patch) | |
| tree | 024bddef605721cc1c22a1827ceb0fdb8df93525 /lib/compiler/src/beam_trim.erl | |
| parent | 97820c026969de7e98d948b301da1e6956f0504d (diff) | |
| download | erlang-01835845579e9f0a8da3574864747cd3ba10db6e.tar.gz | |
Simplify beam_utils
When beam_utils was first written, it did not have the functions
for testing whether a register was not used. Those were added
later, in sort of a hacky way.
Also, is_killed*() and is_not_used*() for Y registers would
return the same answer. Fix that to make the API more consistent
(an Y register can only be killed by a deallocate/1 instruction).
We will need to change beam_trim to call beam_utils:is_not_used/3
instead of beam_utils:is_killed/3.
Diffstat (limited to 'lib/compiler/src/beam_trim.erl')
| -rw-r--r-- | lib/compiler/src/beam_trim.erl | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/compiler/src/beam_trim.erl b/lib/compiler/src/beam_trim.erl index a8dc6805bc..d40669083e 100644 --- a/lib/compiler/src/beam_trim.erl +++ b/lib/compiler/src/beam_trim.erl @@ -230,7 +230,7 @@ safe_labels([], Acc) -> gb_sets:from_list(Acc). frame_layout(Is, Kills, #st{safe=Safe,lbl=D}) -> N = frame_size(Is, Safe), - IsKilled = fun(R) -> beam_utils:is_killed(R, Is, D) end, + IsKilled = fun(R) -> beam_utils:is_not_used(R, Is, D) end, {N,frame_layout_1(Kills, 0, N, IsKilled, [])}. frame_layout_1([{kill,{y,Y}}=I|Ks], Y, N, IsKilled, Acc) -> |