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| author | Björn Gustavsson <[email protected]> | 2016-04-12 06:08:07 +0200 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2016-04-14 12:00:34 +0200 |
| commit | c74f998b9ad46785aaa2557a4033c056574dc937 (patch) | |
| tree | e2a57988fa5ab0f363e84da307e5d909e4011329 /erts | |
| parent | f2d068bb92b49360e04c7150a643f1f9026c288d (diff) | |
| download | otp-c74f998b9ad46785aaa2557a4033c056574dc937.tar.gz otp-c74f998b9ad46785aaa2557a4033c056574dc937.tar.bz2 otp-c74f998b9ad46785aaa2557a4033c056574dc937.zip | |
v3_kernel: Construct literal lists properly
Use cerl:make_list/1 instead of a home-made make_list/1 to ensure that
literal lists are constructed as literals. In a future release, we
would like to forbid in the loader construction of literal lists using
instructions like:
put_list {atom,a} [] Dst
The proper way is:
move {literal,[a]} {x,0}
Also update the comment about "put_list Const [] Dst" in ops.tab.
Diffstat (limited to 'erts')
| -rw-r--r-- | erts/emulator/beam/ops.tab | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab index 96a3a72bb5..83b0299ddd 100644 --- a/erts/emulator/beam/ops.tab +++ b/erts/emulator/beam/ops.tab @@ -529,9 +529,9 @@ i_put_tuple x I i_put_tuple y I # -# The instruction "put_list Const [] Dst" will not be generated by -# the current BEAM compiler. But until R15A, play it safe by handling -# that instruction with the following transformation. +# The instruction "put_list Const [] Dst" were generated in rare +# circumstances up to and including OTP 18. Starting with OTP 19, +# AFAIK, it should never be generated. # put_list Const=c n Dst => move Const x | put_list x n Dst |