Reviewers: ulan, danno,
Description:
ARM: Improve Lithium register constraints.
* Mandate register for input (unless there is only one use.)
* Added macro instructions to use ip register implicitly.
* Updated some Lithium instructions not to corrupt their inputs.
* Reduce reliance on scratch0 and ip; further patch on this to follow.
Gives between 1% and 5% improvement on Kraken, depending on CPU.
BUG=none
TEST=none
Please review this at https://codereview.chromium.org/23156006/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/arm/codegen-arm.h
M src/arm/codegen-arm.cc
M src/arm/lithium-arm.h
M src/arm/lithium-arm.cc
M src/arm/lithium-codegen-arm.h
M src/arm/lithium-codegen-arm.cc
M src/arm/macro-assembler-arm.h
M src/arm/macro-assembler-arm.cc
M src/globals.h
M src/hydrogen-instructions.h
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