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mbrandy 4187035087 PPC: [turbofan] Unify referencing of stack slots 
Port cbbaf9ea6a

Note that the above commit breaks embedded constant pools and will need to
be revised in a future CL.

Original commit message:
    Previously, it was not possible to specify StackSlotOperands for all
    slots in both the caller and callee stacks. Specifically, the region
    of the callee's stack including the saved return address, frame
    pointer, function pointer and context pointer could not be addressed
    by the register allocator/gap resolver.

    In preparation for better tail call support, which will use the gap
    resolver to reconcile outgoing parameters, this change makes it
    possible to address all slots on the stack, because slots in the
    previously inaccessible dead zone may become parameter slots for
    outgoing tail calls. All caller stack slots are accessible as they
    were before, with slot -1 corresponding to the last stack
    parameter. Stack slot indices >= 0 access the callee stack, with slot
    0 corresponding to the callee's saved return address, 1 corresponding
    to the saved frame pointer, 2 corresponding to the current function
    context, 3 corresponding to the frame marker/JSFunction, and slots 4
    and above corresponding to spill slots.

    The following changes were specifically     needed:

    * Frame     has been changed to explicitly manage three areas of the
      callee frame, the fixed header, the spill slot area, and the
      callee-saved register area.
    * Conversions from stack slot indices to fp offsets all now go through
      a common bottleneck: OptimizedFrame::StackSlotOffsetRelativeToFp
    * The generation of deoptimization translation tables has been changed
      to support the new stack slot indexing scheme. Crankshaft, which
      doesn't support the new slot numbering in its register allocator,
      must adapt the indexes when creating translation tables.
    * Callee-saved parameters are now kept below spill slots, not above,
      to support saving only the optimal set of used registers, which is
      only known after register allocation is finished and spill slots
      have been allocated.

R=danno@chromium.org, titzer@chromium.org, jyan@ca.ibm.com, dstence@us.ibm.com, joransiu@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1321553002

Cr-Commit-Position: refs/heads/master@{#30396}
2015-08-26 21:29:38 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build Add experimental, non-snapshotted V8 extras 2015-08-20 00:01:14 +00:00
include Native context: alpha sort slots and remove boilerplate. 2015-08-24 07:15:17 +00:00
infra Revert of [cq] Increase commit burst delay. (patchset #1 id:1 of https://codereview.chromium.org/1258193003/) 2015-07-31 07:16:48 +00:00
samples Rework startup-data-util. 2015-08-14 12:11:46 +00:00
src PPC: [turbofan] Unify referencing of stack slots 2015-08-26 21:29:38 +00:00
test [parser] disallow language mode directive in body of function with non-simple parameters 2015-08-26 14:59:19 +00:00
testing Converted V8 CQ config to proto-format 2015-05-28 15:02:53 +00:00
third_party/binutils Update binutils version. 2015-08-07 08:09:49 +00:00
tools [turbofan] Deferred blocks splintering. 2015-08-25 14:47:38 +00:00
.clang-format Change clang-format config to allow for two empty lines between functions 2013-12-03 10:39:21 +00:00
.gitignore Adding CHECKED_OUT_VERSION to .gitignore. 2015-07-24 06:17:04 +00:00
.ycm_extra_conf.py [ycm] The YouCompleteMe configuration is not VIM specific. 2015-02-12 07:21:13 +00:00
AUTHORS Use static_cast<> for NULL (clang 3.7) 2015-08-11 07:48:59 +00:00
BUILD.gn [turbofan] Deferred blocks splintering. 2015-08-25 14:47:38 +00:00
ChangeLog Update change log to match roll branch. 2015-05-18 15:03:50 +00:00
codereview.settings Removed TRYSERVER_ROOT since this is not used anymore 2015-01-28 11:04:32 +00:00
DEPS Update V8 DEPS. 2015-08-26 03:25:06 +00:00
LICENSE Updates to the license information of third party components. 2015-06-16 12:37:50 +00:00
LICENSE.strongtalk Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
LICENSE.v8 Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
LICENSE.valgrind Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
Makefile Add a makefile option for wasm prototype. 2015-08-18 18:25:31 +00:00
Makefile.android Reland [android] Migrate more configs to gyp. 2015-06-26 12:04:09 +00:00
Makefile.nacl Use the pnacl-clang toolchain for (P)NaCL builds 2014-10-06 08:10:50 +00:00
OWNERS Update OWNERS file. 2015-07-16 11:37:51 +00:00
PRESUBMIT.py Add presubmit check for header inclusion violation. 2015-08-18 16:41:17 +00:00
README.md Fix line breaks in md documentation. 2015-03-25 14:54:54 +00:00
WATCHLISTS Debugger: move implementation to a separate folder. 2015-07-31 11:08:15 +00:00

README.md

V8 JavaScript Engine

V8 is Google's open source JavaScript engine.

V8 implements ECMAScript as specified in ECMA-262.

V8 is written in C++ and is used in Google Chrome, the open source browser from Google.

V8 can run standalone, or can be embedded into any C++ application.

V8 Project page: https://code.google.com/p/v8/

Getting the Code

Checkout depot tools, and run

    fetch v8

This will checkout V8 into the directory v8 and fetch all of its dependencies. To stay up to date, run

    git pull origin
    gclient sync

For fetching all branches, add the following into your remote configuration in .git/config:

    fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
    fetch = +refs/tags/*:refs/tags/*