diff options
| author | Björn Gustavsson <[email protected]> | 2010-12-16 11:15:11 +0100 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2011-01-17 15:23:45 +0100 |
| commit | 92f1409c0e9b986780be483976de3cbbff3bab34 (patch) | |
| tree | 2d2cfc46c32cd6995b82b7000582523fb0d09e35 | |
| parent | d5ab5485430c00734a79068fe0eee7bd4f87cf00 (diff) | |
| download | otp-92f1409c0e9b986780be483976de3cbbff3bab34.tar.gz otp-92f1409c0e9b986780be483976de3cbbff3bab34.tar.bz2 otp-92f1409c0e9b986780be483976de3cbbff3bab34.zip | |
Eliminate the "put_list c n Dst" instructions
Since the literal (constant) pool was introduced in R12, the
BEAM compiler will never generate a "put_list Const [] Dst"
instruction (it will instead generate a "move [Const] Dst"
instruction).
| -rw-r--r-- | erts/emulator/beam/ops.tab | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab index 0b2e2dca83..426cdef24d 100644 --- a/erts/emulator/beam/ops.tab +++ b/erts/emulator/beam/ops.tab @@ -376,16 +376,21 @@ i_put_tuple r I 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. +# +put_list Const=c n Dst => move Const x | put_list x n Dst + %macro:put_list PutList -pack -gen_dest put_list x n x put_list y n x put_list x x x put_list y x x -put_list c n x put_list x x r put_list y r r -put_list c n r put_list y y x put_list x y x |