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| author | Björn Gustavsson <[email protected]> | 2019-02-25 15:45:00 +0100 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2019-02-28 12:18:24 +0100 |
| commit | 8d026110bf57d66aeb25f9d294fc619453744f24 (patch) | |
| tree | d9af91452c662e61d2c8925fce55b13bfe5ea95f /erts | |
| parent | cb2eb1766b5db1d5462a63025e99496ec8c6969b (diff) | |
| download | otp-8d026110bf57d66aeb25f9d294fc619453744f24.tar.gz otp-8d026110bf57d66aeb25f9d294fc619453744f24.tar.bz2 otp-8d026110bf57d66aeb25f9d294fc619453744f24.zip | |
Remove rarely used swap instructions
`swap x y` is rarely or never used. I found a single use of
`swap_temp x y x` in the sample of modules compiled by
`scripts/diffable`.
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 9958d072e7..07357a559f 100644 --- a/erts/emulator/beam/ops.tab +++ b/erts/emulator/beam/ops.tab @@ -288,7 +288,7 @@ move_window4 x x x x y move_window5 x x x x x y # Swap registers. -move R1=x Tmp=x | move R2=xy R1 | move Tmp R2 => swap_temp R1 R2 Tmp +move R1=x Tmp=x | move R2=x R1 | move Tmp R2 => swap_temp R1 R2 Tmp swap_temp R1 R2 Tmp | line Loc | apply Live | is_killed_apply(Tmp, Live) => \ swap R1 R2 | line Loc | apply Live @@ -307,9 +307,9 @@ swap_temp R1 R2 Tmp | line Loc | call_ext_only Live Addr | \ swap_temp R1 R2 Tmp | line Loc | call_ext_last Live Addr D | \ is_killed(Tmp, Live) => swap R1 R2 | line Loc | call_ext_last Live Addr D -swap_temp x xy x +swap_temp x x x -swap x xy +swap x x # move_dup |