Summary: * Validate RM toolchain, Linaro QENU 2012.12 and Linaro aarch64 2012.11. * Collect performance data for different branch cost.

Details: * Validate RM toolchain release. * Set up test environment with the help of Michael and validate Linaro QEMU 2012.12 release. * Validate aarch64 toolchain 2012.11. From 2012.12, it will be released regularly like arm-linux-gnueabihf toolchain. * Collect denbench and spec2000int performance data for branch cost tuning. * Investigate how to do copy propagation for shrink-wrap to optimize 453.povray benchmark. Will reuse current codes in pass_cprop_hardreg.

Plans: * Performance reports for branch cost tuning. * Fix README issue (lp:1068402) in Linaro crosstool-ng.

Best regards! -Zhenqiang