60267da6d9
Port r12373 (9fdde2ad) Original commit message: Fix DoDeferredNumberTagU to keep the value in xmm1 instead of xmm0 on x64. xmm0 is not saved across runtime call on x64 because MacroAssembler::EnterExitFrameEpilogue preserves only allocatable XMM registers unlike on ia32 where it preserves all registers. Cleanup handling of shifts: SHR can deoptimize only when its a shift by 0, all other shift never deoptimize. Fix type inference for i-to-t change instruction. On X64 this ensures that write-barrier is generated correctly. BUG= TEST= Review URL: https://chromiumcodereview.appspot.com/10876054 Patch from Akos Palfi <palfia@homejinni.com>. git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12831 ce2b1a6d-e550-0410-aec6-3dcde31c8c00 |
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