This only wins us around 1% in performance, but it makes the code more
compact. We don't currently have a way to represent in the virtual
frame that a slot contains a value from the root array. Adding this
would probably make the code more compact.
Review URL: http://codereview.chromium.org/174639
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2783 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The SCons build now supports building for 64-bit Windows. This still requires that the SCons build is passed an env parameter containing the PATH and LIB for the 64-bit build as SCons autodetects the 32-bit environment.
Lowered the warning level for the 64-bit build temporarily.
Added a verbose option to SCons to display the startup banner for the Microsoft Visual C++ tools.
Review URL: http://codereview.chromium.org/174605
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2774 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Factored out the allocation in new space from assembler code into the macro assembler. To support the current allocation patterns a number of different functions where required.
This is change is identical to http://codereview.chromium.org/174524 (committed in r2768 and reverted in r2769) except that line 710 in macro-assembler-ia32.cc is
cmp(result_end, Operand::StaticVariable(new_space_allocation_limit));
instead of
cmp(result, Operand::StaticVariable(new_space_allocation_limit));
and pre-submit fixes as well.
TBR=ager@chromium.org
Review URL: http://codereview.chromium.org/174600
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2771 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
For objects which only have simple assignments of the form this.x = ...; a
specialized constructor stub is now generated. This generated code allocates the
object and fills in the initial properties directly. If this fails for some
reason code continues in the generic constructor stub which in turn might pass
control to the runtime system.
Added counter to see how many objects are constructed using a specialized stub.
The specialized stub is only implemented for ia32 architecture in this change.
For x64 and ARM the generic construct stub is used.
This is change is identical to http://codereview.chromium.org/174392 (committed in r2753 and reverted in r2754) except that a few parts have already been committed from http://codereview.chromium.org/173469 (committed in r2762).
Review URL: http://codereview.chromium.org/173470
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2764 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
When copying a map always set the descriptor array to describe the pre-allocated properties, even when descriptors are to be dropped.
Added a test which otherwise failed with an assert on ARM in debug mode. The reason for it only surfasing on ARM is that the NewObject runtime function is always used for allocating new JSObjects on ARM.
This change includes a few parts of http://codereview.chromium.org/174392 needed to trigger the error.
Review URL: http://codereview.chromium.org/173469
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2762 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
For objects which only have simple assignments of the form this.x = ...; a specialized constructor stub is now generated. This generated code allocates the object and fills in the initial properties directly. If this fails for some reason code continues in the generic constructor stub which in turn might pass control to the runtime system.
Added counter to see how many objects are constructed using a specialized stub.
The specialized stub is only implemented for ia32 architecture in this change. For x64 and ARM the generic construct stub is used.
Review URL: http://codereview.chromium.org/174392
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2753 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Don't copy the ENV variable from the users's external environment into
construction environments. SCons uses this as a dictionary of environment
values for the commands it executes.
BUG=none
TEST=build with the variable ENV set in the user environment
Review URL: http://codereview.chromium.org/173294
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2750 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
-fstrict-aliasing is enabled by mainline gcc at -O2 and higher, but in Apple
gcc, it must be enabled explicitly. This results in a 1.5% improvement in V8
benchmark scores.
This also removes the -fno-exceptions and -fno-rtti settings from v8.gyp for
the Mac, and removes -fno-rtti from v8.gyp for Linux, because these settings
have become part of Chromium's common.gypi, included here, as of r23304 at the
latest. The settings in v8.gyp have become redundant.
Review URL: http://codereview.chromium.org/174154
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2734 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
system can't currently process stacks produced by gcc -fomit-frame-pointer
properly. The drawback outweighs the 2% performance improvement. Once
the crash reporting system is able to handle this optimization, it should be
revisited.
Review URL: http://codereview.chromium.org/173123
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2733 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
