Reviewers: Igor Sheludko,
Description:
[stubs] Further optimize Load/StoreGlobalViaContext stubs.
a) Don't use separate read/write slots for context globals, but share the
same slot, which reduces the number of initial misses, and also saves
some memory for large scripts.
b) No need to pass the name explicitly to the stubs; the runtime can
extract the name from the ScopeInfo (the extension of the
ScriptContext) on-demand easily without any performance impact.
[email protected]
Please review this at https://codereview.chromium.org/1250413002/
Base URL: https://chromium.googlesource.com/v8/v8.git@master
Affected files (+103, -157 lines):
M src/compiler/ast-graph-builder.cc
M src/compiler/js-generic-lowering.cc
M src/contexts.cc
M src/flag-definitions.h
M src/hydrogen.cc
M src/hydrogen-instructions.h
M src/hydrogen-instructions.cc
M src/ia32/code-stubs-ia32.cc
M src/ia32/full-codegen-ia32.cc
M src/ia32/interface-descriptors-ia32.cc
M src/ia32/lithium-codegen-ia32.cc
M src/ia32/lithium-ia32.h
M src/ia32/lithium-ia32.cc
M src/interface-descriptors.h
M src/interface-descriptors.cc
M src/objects.h
M src/runtime/runtime.h
M src/runtime/runtime-object.cc
M src/scopeinfo.cc
M src/scopes.cc
M src/x64/code-stubs-x64.cc
M src/x64/full-codegen-x64.cc
M src/x64/interface-descriptors-x64.cc
M src/x64/lithium-codegen-x64.cc
M src/x64/lithium-x64.h
M src/x64/lithium-x64.cc
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