== Linaro GCC == * Merge ldm/stm patch to Linaro 4.5 tree. Found two regressions on the last minute of proposing merge request in pass ce3. Revert one of ldm/stm patches about ifcvt. Complete testcase in branch. * Try Richard E.'s "TST to LSLS transformation" patch on cortex-a9 with FFMPEG. No speed improvements.

* Various Linaro GCC Bug fixing. ** LP:634738 Follow the fix to GCC PR40697, and create a new patch, which emits extzv or shift rather than loading constants in some cases. Tested on FSF GCC trunk, and no regression. However, found a regression by eyes in pr44999.c, in which, ubfx (4byte) is generated, rather than uxth (2byte). uxth is produced by combiner from ashift and lshiftrt. During reading arm.c, find that constant handling in thumb2 should be improved to some extent. ** LP:633243 Re-implement regrename improvement, as Eric B. suggested in gcc-patches. Spend some time on understanding API in GCC related to hard-reg. Tested on x86_64-linux. No regression. ** LP:638935 Update my tree to FSF trunk, and find RTL seq for fldm/fstm peephole disappears due to fix to PR45722. Extend arm-ldmstm.ml to support vfp. Peephole and RTL patterns for vfp are done. Will revise arm.c:{load,store}_multiple_sequence to accept vfp data. Fix a bug in ldm/stm peephole when starting offset is negative.

== This week ==

* LP:634738: Figure out how uxth is produced by combiner. * LP:633243: Test it on ARM. * LP:638935: Revise {load,store}_multiple_sequence to accept vfp data.