Loading llvm/docs/ReleaseNotes.rst +13 −0 Original line number Diff line number Diff line Loading @@ -72,6 +72,19 @@ Non-comprehensive list of changes in this release instruction set that can be dynamically loaded into the Linux kernel via the `bpf(2) <http://man7.org/linux/man-pages/man2/bpf.2.html>`_ syscall. Support for BPF has been present in the kernel for some time, but starting from 3.18 has been extended with such features as: 64-bit registers, 8 additional registers registers, conditional backwards jumps, call instruction, shift instructions, map (hash table, array, etc.), 1-8 byte load/store from stack, and more. Up until now, users of BPF had to write bytecode by hand, or use custom generators. This release adds a proper LLVM backend target for the BPF bytecode architecture. The BPF target is now available by default, and options exist in both Clang (-target bpf) or llc (-march=bpf) to pick eBPF as a backend. * Switch-case lowering was rewritten to avoid generating unbalanced search trees (`PR22262 <http://llvm.org/pr22262>`_) and to exploit profile information when available. Some lowering strategies are now disabled when optimizations Loading Loading
llvm/docs/ReleaseNotes.rst +13 −0 Original line number Diff line number Diff line Loading @@ -72,6 +72,19 @@ Non-comprehensive list of changes in this release instruction set that can be dynamically loaded into the Linux kernel via the `bpf(2) <http://man7.org/linux/man-pages/man2/bpf.2.html>`_ syscall. Support for BPF has been present in the kernel for some time, but starting from 3.18 has been extended with such features as: 64-bit registers, 8 additional registers registers, conditional backwards jumps, call instruction, shift instructions, map (hash table, array, etc.), 1-8 byte load/store from stack, and more. Up until now, users of BPF had to write bytecode by hand, or use custom generators. This release adds a proper LLVM backend target for the BPF bytecode architecture. The BPF target is now available by default, and options exist in both Clang (-target bpf) or llc (-march=bpf) to pick eBPF as a backend. * Switch-case lowering was rewritten to avoid generating unbalanced search trees (`PR22262 <http://llvm.org/pr22262>`_) and to exploit profile information when available. Some lowering strategies are now disabled when optimizations Loading
