Only assign environments when they are actually needed. (ARM and ARM64 only)
authorsvenpanne@chromium.org <svenpanne@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Tue, 1 Apr 2014 07:21:31 +0000 (07:21 +0000)
committersvenpanne@chromium.org <svenpanne@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Tue, 1 Apr 2014 07:21:31 +0000 (07:21 +0000)
commit51c209c60915ec5e91703500a645f9edea29feae
tree37426a558772cbcddbe5959ea653a2664e1140f1
parent0d04cba759f3cc61c652a0f33f5bac37d769fe55
Only assign environments when they are actually needed. (ARM and ARM64 only)

Twin of https://codereview.chromium.org/210783003/ and https://codereview.chromium.org/211153003/.

Cleaned up DoChange a bit on the way, making things more uniform across platforms, removed useless comments etc.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/214613004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20376 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
src/arm/lithium-arm.cc
src/arm64/lithium-arm64.cc
src/arm64/lithium-arm64.h
src/ia32/lithium-ia32.cc
src/x64/lithium-x64.cc