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v8/src/SConscript
kmillikin@chromium.org f74e723599 Initial infrastructure for fast compilation of top-level code. The 
fast code generator is optimized for compilation time and code size.

Currently it is only implemented on IA32.  It is potentially triggered
for any code in the global scope (including code eval'd in the global
scope).  It performs a syntactic check and chooses to compile in fast
mode if the AST contains only supported constructs and matches some
other constraints.

Initially supported constructs are

* ExpressionStatement,
* ReturnStatement,
* VariableProxy (variable references) to parameters and
    stack-allocated locals,
* Assignment with lhs a parameter or stack-allocated local, and
* Literal

This allows compilation of literals at the top level and not much
else.

All intermediate values are allocated to temporaries and the stack is
used for all temporaries.  The extra memory traffic is a known issue.

The code generated for 'true' is:

 0  push ebp
 1  mov ebp,esp
 3  push esi
 4  push edi
 5  push 0xf5cca135             ;; object: 0xf5cca135 <undefined>
10  cmp esp,[0x8277efc]
16  jnc 27  (0xf5cbbb1b)
22  call 0xf5cac960             ;; code: STUB, StackCheck, minor: 0
27  push 0xf5cca161             ;; object: 0xf5cca161 <true>
32  mov eax,[esp]
35  mov [ebp+0xf4],eax
38  pop eax
39  mov eax,[ebp+0xf4]
42  mov esp,ebp                 ;; js return
44  pop ebp
45  ret 0x4
48  mov eax,0xf5cca135          ;; object: 0xf5cca135 <undefined>
53  mov esp,ebp                 ;; js return
55  pop ebp
56  ret 0x4

Review URL: http://codereview.chromium.org/273050

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3067 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-10-14 19:30:50 +00:00

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# Copyright 2008 the V8 project authors. All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import sys
from os.path import join, dirname, abspath
root_dir = dirname(File('SConstruct').rfile().abspath)
sys.path.append(join(root_dir, 'tools'))
import js2c
Import('context')
SOURCES = {
'all': [
'accessors.cc', 'allocation.cc', 'api.cc', 'assembler.cc', 'ast.cc',
'bootstrapper.cc', 'builtins.cc', 'checks.cc', 'code-stubs.cc',
'codegen.cc', 'compilation-cache.cc', 'compiler.cc', 'contexts.cc',
'conversions.cc', 'counters.cc', 'dateparser.cc', 'debug.cc',
'debug-agent.cc', 'disassembler.cc', 'execution.cc', 'factory.cc',
'flags.cc', 'frame-element.cc', 'frames.cc',
'func-name-inferrer.cc', 'global-handles.cc', 'handles.cc',
'hashmap.cc', 'heap.cc', 'heap-profiler.cc', 'ic.cc',
'interpreter-irregexp.cc', 'jsregexp.cc', 'jump-target.cc', 'log.cc',
'log-utils.cc', 'mark-compact.cc', 'messages.cc', 'objects.cc',
'oprofile-agent.cc', 'parser.cc', 'property.cc',
'regexp-macro-assembler.cc', 'regexp-macro-assembler-irregexp.cc',
'regexp-stack.cc', 'register-allocator.cc', 'rewriter.cc', 'runtime.cc',
'scanner.cc', 'scopeinfo.cc', 'scopes.cc', 'serialize.cc',
'snapshot-common.cc', 'spaces.cc', 'string-stream.cc', 'stub-cache.cc',
'token.cc', 'top.cc', 'unicode.cc', 'usage-analyzer.cc', 'utils.cc',
'v8-counters.cc', 'v8.cc', 'v8threads.cc', 'variables.cc', 'version.cc',
'virtual-frame.cc', 'zone.cc'
],
'arch:arm': [
'arm/assembler-arm.cc', 'arm/builtins-arm.cc', 'arm/codegen-arm.cc',
'arm/constants-arm.cc', 'arm/cpu-arm.cc', 'arm/disasm-arm.cc',
'arm/debug-arm.cc', 'arm/frames-arm.cc', 'arm/ic-arm.cc',
'arm/jump-target-arm.cc', 'arm/macro-assembler-arm.cc',
'arm/regexp-macro-assembler-arm.cc', 'arm/register-allocator-arm.cc',
'arm/stub-cache-arm.cc', 'arm/virtual-frame-arm.cc'
],
'arch:ia32': [
'fast-codegen.cc', 'ia32/assembler-ia32.cc', 'ia32/builtins-ia32.cc',
'ia32/codegen-ia32.cc', 'ia32/cpu-ia32.cc', 'ia32/disasm-ia32.cc',
'ia32/debug-ia32.cc', 'ia32/fast-codegen-ia32.cc',
'ia32/frames-ia32.cc', 'ia32/ic-ia32.cc', 'ia32/jump-target-ia32.cc',
'ia32/macro-assembler-ia32.cc', 'ia32/regexp-macro-assembler-ia32.cc',
'ia32/register-allocator-ia32.cc', 'ia32/stub-cache-ia32.cc',
'ia32/virtual-frame-ia32.cc'
],
'arch:x64': [
'x64/assembler-x64.cc', 'x64/builtins-x64.cc', 'x64/codegen-x64.cc',
'x64/cpu-x64.cc', 'x64/disasm-x64.cc', 'x64/debug-x64.cc',
'x64/frames-x64.cc', 'x64/ic-x64.cc', 'x64/jump-target-x64.cc',
'x64/macro-assembler-x64.cc', 'x64/regexp-macro-assembler-x64.cc',
'x64/register-allocator-x64.cc', 'x64/stub-cache-x64.cc',
'x64/virtual-frame-x64.cc'
],
'simulator:arm': ['arm/simulator-arm.cc'],
'os:freebsd': ['platform-freebsd.cc', 'platform-posix.cc'],
'os:linux': ['platform-linux.cc', 'platform-posix.cc'],
'os:android': ['platform-linux.cc', 'platform-posix.cc'],
'os:macos': ['platform-macos.cc', 'platform-posix.cc'],
'os:nullos': ['platform-nullos.cc'],
'os:win32': ['platform-win32.cc'],
'mode:release': [],
'mode:debug': [
'objects-debug.cc', 'prettyprinter.cc', 'regexp-macro-assembler-tracer.cc'
]
}
D8_FILES = {
'all': [
'd8.cc', 'd8-debug.cc'
],
'os:linux': [
'd8-posix.cc'
],
'os:macos': [
'd8-posix.cc'
],
'os:android': [
'd8-posix.cc'
],
'os:freebsd': [
'd8-posix.cc'
],
'os:win32': [
'd8-windows.cc'
],
'os:nullos': [
'd8-windows.cc' # Empty implementation at the moment.
],
'console:readline': [
'd8-readline.cc'
]
}
LIBRARY_FILES = '''
runtime.js
v8natives.js
array.js
string.js
uri.js
math.js
messages.js
apinatives.js
debug-delay.js
mirror-delay.js
date-delay.js
regexp-delay.js
json-delay.js
'''.split()
def Abort(message):
print message
sys.exit(1)
def ConfigureObjectFiles():
env = Environment()
env.Replace(**context.flags['v8'])
context.ApplyEnvOverrides(env)
env['BUILDERS']['JS2C'] = Builder(action=js2c.JS2C)
env['BUILDERS']['Snapshot'] = Builder(action='$SOURCE $TARGET --logfile "$LOGFILE"')
# Build the standard platform-independent source files.
source_files = context.GetRelevantSources(SOURCES)
d8_files = context.GetRelevantSources(D8_FILES)
d8_js = env.JS2C('d8-js.cc', 'd8.js', TYPE='D8')
d8_js_obj = context.ConfigureObject(env, d8_js, CPPPATH=['.'])
d8_objs = [context.ConfigureObject(env, [d8_files]), d8_js_obj]
# Combine the JavaScript library files into a single C++ file and
# compile it.
library_files = [s for s in LIBRARY_FILES]
library_files.append('macros.py')
libraries_src, libraries_empty_src = env.JS2C(['libraries.cc', 'libraries-empty.cc'], library_files, TYPE='CORE')
libraries_obj = context.ConfigureObject(env, libraries_src, CPPPATH=['.'])
# Build dtoa.
dtoa_env = env.Copy()
dtoa_env.Replace(**context.flags['dtoa'])
dtoa_files = ['dtoa-config.c']
dtoa_obj = context.ConfigureObject(dtoa_env, dtoa_files)
source_objs = context.ConfigureObject(env, source_files)
non_snapshot_files = [dtoa_obj, source_objs]
# Create snapshot if necessary.
empty_snapshot_obj = context.ConfigureObject(env, 'snapshot-empty.cc')
mksnapshot_env = env.Copy()
mksnapshot_env.Replace(**context.flags['mksnapshot'])
mksnapshot_src = 'mksnapshot.cc'
mksnapshot = mksnapshot_env.Program('mksnapshot', [mksnapshot_src, libraries_obj, non_snapshot_files, empty_snapshot_obj], PDB='mksnapshot.exe.pdb')
if context.use_snapshot:
if context.build_snapshot:
snapshot_cc = env.Snapshot('snapshot.cc', mksnapshot, LOGFILE=File('snapshot.log').abspath)
else:
snapshot_cc = Command('snapshot.cc', [], [])
snapshot_obj = context.ConfigureObject(env, snapshot_cc, CPPPATH=['.'])
libraries_obj = context.ConfigureObject(env, libraries_empty_src, CPPPATH=['.'])
else:
snapshot_obj = empty_snapshot_obj
library_objs = [non_snapshot_files, libraries_obj, snapshot_obj]
return (library_objs, d8_objs, [mksnapshot])
(library_objs, d8_objs, mksnapshot) = ConfigureObjectFiles()
Return('library_objs d8_objs mksnapshot')
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