This change introduces register re-mapping to avoid assignment hazards
in binary expressions. Expressions that cause problems typically have
the form y = x + (x = 4);. The problem occurs because the lhs value
evaluates to the register holding x. The rhs updates that register and
then applying the operation would use the new value as the lhs.
By tracking loads and stores in binary expressions the generator is now
able to detect when condition occurs and uses a temporary register for
the rhs value. When the binary expression evaluation is complete the
variable is updated with the latest temporary.
A new bytecode Mov performs this update without touching the
accumulator.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1412683011
Cr-Commit-Position: refs/heads/master@{#32141}
Adds support for the New, CallRuntime and CallJSRuntime bytecodes in
BytecodeGraphBuilder. Also adds BuildLoadObjectField,
BuildLoadGlobalObject and BuildLoadNativeContextField helpers.
Landed on behalf of rmcilroy.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1456483002
Cr-Commit-Position: refs/heads/master@{#32136}
Adds support for visiting the Call bytecode to the bytecode graph builder.
This change also adds the call type feedback slot to the Call bytecode.
This is not currently used by the interpreter, but is used by the
graph builder.
Also adds a CallWide varient of the Call bytecode, and adds the kCount16
operand type.
Landed on behalf of rmcilroy.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1456453002
Cr-Commit-Position: refs/heads/master@{#32033}
Adds an optimization to omit generating Ldar/Star if the same register
is loaded or stored from the accumulator in the earlier instruction.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1435283002
Cr-Commit-Position: refs/heads/master@{#31984}
This aligns the naming of "new target" with the spec text throughout
TurboFan and the stack frame walker. The goal is to avoid unnecessary
confusion for people familiar with the spec.
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/1442643002
Cr-Commit-Position: refs/heads/master@{#31978}
Adds a test that the receiver for sloppy mode functions is replaced with
the global proxy when called with an undefined receiever.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1410113008
Cr-Commit-Position: refs/heads/master@{#31854}
On MIPS arch, all memory accesses (including halfword)
must be aligned to their native size or an alignment exception occurs.
The kernel will fix this up, but with performance penalty.
TEST=test-bytecode-generator/CallRuntime
BUG=
Review URL: https://codereview.chromium.org/1423373004
Cr-Commit-Position: refs/heads/master@{#31845}
Adds support for calling JS runtime functions. Also changes the bytecode
array builder to allow calling functions with an invalid argument
register if the call takes no arguments.
Adds the bytecode CallJSRuntime.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1410003003
Cr-Commit-Position: refs/heads/master@{#31774}
Corrects LdaGlobal to deal with TypeofMode::INSIDE_TYPEOF so that it
doesn't throw a reference error on undefined globals.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1422443006
Cr-Commit-Position: refs/heads/master@{#31757}
Existing code was assuming that 'lexical' blocks were the same as basic
blocks, therefore code which emitted jumps within a lexical block (e.g.,
logical or) would in some occassions incorrectly omit a necessary
ToBoolean.
This change removes Enter/LeaveBlock from BytecodeArrayBuilder and
instead tracks basic blocks via label bindings and jump operations. The
change also ensures we don't emit dead code at the end of a basic block,
and adds tests of the edge cases.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1406983010
Cr-Commit-Position: refs/heads/master@{#31741}
Adds an optimization to not emit unnecessary jumps and dead code in If,
For, While, and do-while statments. When the value of condition is known
at compile time, the code is emitted only for the paths that can be taken.
For example, when the condition is known to be true in an if statmenet
only then block is generated.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1414193006
Cr-Commit-Position: refs/heads/master@{#31715}
Adds an optimization to emit JumpIfToBooleanTrue/False instead
of ToBoolean followed by JumpIfTrue/False if the value in the
accumulator is not boolean.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1426913002
Cr-Commit-Position: refs/heads/master@{#31697}
Adds support for switch statments to the interpreter.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1415093006
Cr-Commit-Position: refs/heads/master@{#31687}
This moves the cctest file for the interpreter to live in the same
namespace as the components it is testing. Hence we can avoid the
forbidden using directives pulling in entire namespaces.
From the Google C++ style guide: "You may not use a using-directive to
make all names from a namespace available". This would be covered by
presubmit linter checks if build/namespaces were not blacklisted.
R=rmcilroy@chromium.org
Review URL: https://codereview.chromium.org/1410993009
Cr-Commit-Position: refs/heads/master@{#31681}
For..in introduces 3 new bytecodes ForInPrepare, ForInNext, and
ForInDone to start a for..in loop, get the next element, and check if
the loop is done.
For..in builds upon new LoopBuilder constructs for conditionally
breaking and continuing during iteration: BreakIf{Null|Undefined}
and ContinueIf{Null|Undefined}. New conditional jump bytecodes
support this succinctly: JumpIfNull and JumpIfUndefined.
Add missing check to BytecodeLabel that could allow multiple
forward referencess to the same label which is not supported.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1422033002
Cr-Commit-Position: refs/heads/master@{#31651}
Adds support for delete operator, it's implementation and tests.
Adds tests for the following unary operators
-BitwiseNot
-Add
-Sub
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1410953003
Cr-Commit-Position: refs/heads/master@{#31620}
Adds support for loading from and storing to outer context
variables. Also adds support for declaring functions on contexts and
locals. Finally, fixes a couple of issues with StaContextSlot where
we weren't emitting the write barrier and therefore would crash in the
GC.
Also added code so that --print-bytecode will output the
function name before the bytecodes, and replaces MachineType with StoreRepresentation in RawMachineAssembler::Store and updates tests.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1425633002
Cr-Commit-Position: refs/heads/master@{#31584}
Adds support and tests for conditional (ternary) expressions.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1417053004
Cr-Commit-Position: refs/heads/master@{#31575}
Fills out some more of the function prologue support in the
interpreter. Deals with creation of arguments objects and throwing
IllegalRedeclarations if necessary. Also adds (untested) support for
this.function and new.target variable assignment.
Also fixes a bug in Frames::is_java_script() to deal with
interpreter frames correctly.
Cleans up comments in builtins InterpreterEntryTrampoline about
missing prologue support.
Adds the following bytecodes:
- CreateArgumentsSloppy
- CreateArgumentsStrict
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1412953007
Cr-Commit-Position: refs/heads/master@{#31486}
Adds support for compound expressions for variables and named / keyed
property assignments.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1420503002
Cr-Commit-Position: refs/heads/master@{#31485}
Adds support for count operations to the interpreter. Deals with count
operations on locals, globals, context allocated variables and named and
keyed properties.
Adds the following bytecodes:
ToNumber
Inc
Dec
BUG=v8:4280
LOG=N
TBR=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1416623003
Cr-Commit-Position: refs/heads/master@{#31484}
Unifies the global and unallocated variable type accesses given that
--global_var_shortcuts is going away. Lda/StaGlobal is modified to use
Load/StoreICs on the global object. The named LoadIC and StoreIC bytecodes
are also modified so that they take a constant pool entry index for the
name rather than a register, avoiding unecessary LdaConstant bytecodes to
be emitted.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1419003002
Cr-Commit-Position: refs/heads/master@{#31482}
The plan is to implement the same idea using vector IC machinery.
Stubs implementations and scopes modifications are left untouched for now.
Review URL: https://codereview.chromium.org/1419823003
Cr-Commit-Position: refs/heads/master@{#31458}
This change adds new flavors of Visit() methods for obtaining
expression results:
- VisitForAccumulatorValue() which places result in the accumulator.
- VisitForRegisterValue() which places the result in a register.
- VisitForEffect() which evaluates the expression and discards the result.
The targets of these calls place the expression result with
result_scope()->SetResultInRegister() or
result_scope()->SetResultInAccumulator().
By being smarter about result locations, there's less temporary
register usage. However, we now have a hazard with assignments
in binary expressions that didn't exist before. This change detects and
DCHECK's when a hazard is detected. A follow on CL will address this.
There are consequential changes to test-bytecode-generator.cc and
this change also adds new bytecode macros A(x, n) and THIS(n) for
register file entries for arguments and this.
BUG=v8:4280
LOG=NO
Review URL: https://codereview.chromium.org/1392933002
Cr-Commit-Position: refs/heads/master@{#31445}
Adds support for local context loads and stores. Also adds support for
creation of new block contexts (e.g., for let variables) and initializing
const / let variables with the hole appropriately.
Also adds some checks to ensure BytecodeArrayBuilder::context_count is set
appropriately and fixes tests to do so.
Adds the bytecode StaContextSlot.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1403943004
Cr-Commit-Position: refs/heads/master@{#31343}
This change add a new bytecode for operator new and implements it using
the Construct() builtin.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1402943002
Cr-Commit-Position: refs/heads/master@{#31293}
Adds support for following operators
-Logical and
-Logical or
-Comma
Adds the above bytecodes, support to BytecodeGenerator and BytecodeArrayBuilder
to enable it's use, it's implementation and tests.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1399773002
Cr-Commit-Position: refs/heads/master@{#31281}
The AccessorsTable has a non-deterministic iteration order depending on the
random seed. This means that the order of the accessor defines could vary
and the test which tried to set accessors on two different properties
could flakly fail due to the order not being as expected. To fix this I make
the test only do a setter on one property (the test-interpreter.cc test
does the check on multiple property accessors
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1404793002
Cr-Commit-Position: refs/heads/master@{#31264}
Replaces the use of KeyedStoreICGeneric with a vector based KeyedStoreIC for
array literal computed stores now that there is a feedback vector slot for
these expressions. Removes KeyedStoreICGeneric bytecode since this is no
longer necessary.
BUG=v8:4280
LOG=N
TBR=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1400353002
Cr-Commit-Position: refs/heads/master@{#31262}
Adds Object literal support to the interpreter. Adds the following bytecodes:
- ToName
- CreateObjectLiteral.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1386313005
Cr-Commit-Position: refs/heads/master@{#31253}
Adds array literal support to the interpreter. Currently constructed
array elements don't have type feedback slots, so also adds support for
generic keyed store operations.
Adds the following bytecodes:
- CreateArrayLiteral
- KeyedStoreICGeneric
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1400753003
Cr-Commit-Position: refs/heads/master@{#31240}
Adds support for creation of new local function contexts (or script context for
top-level code). As part of this, also adds support for context push/pop
operations using a ContextScope object in BytecodeGenerator. Adds the following
bytecodes:
- PushContext
- PopContext
Support for inner contexts and loading from / storing to context allocated
variables will come in a future CL.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1379793004
Cr-Commit-Position: refs/heads/master@{#31238}
Adds function literal support and add support for OTHER_CALLS which can be
made when calling a function literal.
Adds the CreateClosure bytecode.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1396693003
Cr-Commit-Position: refs/heads/master@{#31231}
-Bitwise Or
-Bitwise Xor
-Bitwise And
Adds the above bytecodes, support to BytecodeGenerator and BytecodeArrayBuilder to enable it's use, it's implementation and tests.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1386133002
Cr-Commit-Position: refs/heads/master@{#31210}
Adds support for following operators
-Shift left
-Shift right
-Shift right logical
Adds the above bytecodes, support to BytecodeGenerator and BytecodeArrayBuilder
to enable it's use, it's implementation and tests.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1392913002
Cr-Commit-Position: refs/heads/master@{#31205}
