Reviewers: Benedikt Meurer, mvstanton,
Message:
PTAL
Description:
Add a MathFloor stub generated with TurboFan
This stub will be used as the basis of a Math.floor-specific CallIC to
detect and track calls to floor that return -0.
Along the way:
- Create a TurboFanCodeStub super class that the StringLength and
MathRound TF stubs derive from
- Fix the ugly hack that passes the first stub parameter as the "this"
pointer in the the TF-compiled JS function.
Please review this at https://codereview.chromium.org/1137703002/
Base URL: https://chromium.googlesource.com/v8/v8.git@master
Affected files (+430, -132 lines):
M src/arm/interface-descriptors-arm.cc
M src/arm64/interface-descriptors-arm64.cc
M src/code-stubs.h
M src/code-stubs.cc
M src/compiler.h
M src/compiler.cc
M src/compiler/access-builder.h
M src/compiler/access-builder.cc
M src/compiler/ast-graph-builder.cc
M src/compiler/js-intrinsic-lowering.h
M src/compiler/js-intrinsic-lowering.cc
M src/compiler/linkage.cc
M src/compiler/typer.cc
M src/ia32/disasm-ia32.cc
M src/ia32/interface-descriptors-ia32.cc
M src/interface-descriptors.h
M src/mips/interface-descriptors-mips.cc
M src/mips64/interface-descriptors-mips64.cc
M src/runtime.js
M src/runtime/runtime.h
M src/runtime/runtime-array.cc
M src/runtime/runtime-collections.cc
M src/type-feedback-vector.cc
M src/x64/interface-descriptors-x64.cc
M test/cctest/compiler/test-run-stubs.cc
A + test/mjsunit/tf-stubs-floor.js
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