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| author | Björn Gustavsson <[email protected]> | 2010-09-29 12:16:56 +0200 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2011-01-17 15:23:38 +0100 |
| commit | ec325cc785916c6a4991fe2e03747a97b7e1ae75 (patch) | |
| tree | f6edcc29d40637dfa270b6bf5b4e7c97fc0ce1cc /erts/emulator/beam | |
| parent | 7738e604909c52ebac606eed5f6314291747e938 (diff) | |
| download | otp-ec325cc785916c6a4991fe2e03747a97b7e1ae75.tar.gz otp-ec325cc785916c6a4991fe2e03747a97b7e1ae75.tar.bz2 otp-ec325cc785916c6a4991fe2e03747a97b7e1ae75.zip | |
BEAM loader: Combine is_type/1 and is_eq/1 instructions
In the transformation engine in the loader, an is_eq/1 instruction
is currently always preceded by an is_type/1 instruction. Therefore,
save a word and slight amount of time by combining those
instructions into an is_type_eq/2 instruction.
Diffstat (limited to 'erts/emulator/beam')
| -rw-r--r-- | erts/emulator/beam/beam_load.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c index feac89784b..73644ecfd6 100644 --- a/erts/emulator/beam/beam_load.c +++ b/erts/emulator/beam/beam_load.c @@ -3867,11 +3867,23 @@ transform_engine(LoaderState* st) if (i == 0) goto restart; break; +#if defined(TOP_is_eq) case TOP_is_eq: ASSERT(ap < instr->arity); if (*pc++ != instr->a[ap].val) goto restart; break; +#endif + case TOP_is_type_eq: + mask = *pc++; + + ASSERT(ap < instr->arity); + ASSERT(instr->a[ap].type < BEAM_NUM_TAGS); + if (((1 << instr->a[ap].type) & mask) == 0) + goto restart; + if (*pc++ != instr->a[ap].val) + goto restart; + break; case TOP_is_same_var: ASSERT(ap < instr->arity); i = *pc++; |