From: Diana Picus Date: Fri, 20 Jan 2017 11:34:32 +0000 (+0000) Subject: Add some release notes for ARM and AArch64 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d6011060b1a8a12bd81d2a8faefc24585c12cc8f;p=llvm Add some release notes for ARM and AArch64 git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_40@292602 91177308-0d34-0410-b5e6-96231b3b80d8 --- diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst index dcb742e18c6..87d6182cd90 100644 --- a/docs/ReleaseNotes.rst +++ b/docs/ReleaseNotes.rst @@ -7,8 +7,7 @@ LLVM 4.0.0 Release Notes .. warning:: These are in-progress notes for the upcoming LLVM 4.0.0 release. You may - prefer the `LLVM 3.9 Release Notes `_. + prefer the `LLVM 3.9 Release Notes `_. Introduction @@ -69,19 +68,44 @@ Non-comprehensive list of changes in this release Improvements to ThinLTO (-flto=thin) ------------------------------------ - * Integration with profile data (PGO). When available, profile data - enables more accurate function importing decisions, as well as + * Integration with profile data (PGO). When available, profile data + enables more accurate function importing decisions, as well as cross-module indirect call promotion. - * Significant build-time and binary-size improvements when compiling with + * Significant build-time and binary-size improvements when compiling with debug info (-g). Changes to the LLVM IR ---------------------- -Changes to the ARM Backend +Changes to the ARM Targets -------------------------- - During this release ... +**During this release the AArch64 target has:** + +* Gained support for ILP32 relocations. +* Gained support for XRay. +* Made even more progress on GlobalISel. There is still some work left before + it is production-ready though. +* Refined the support for Qualcomm's Falkor and Samsung's Exynos CPUs. +* Learned a few new tricks for lowering multiplications by constants, folding + spilled/refilled copies etc. + +**During this release the ARM target has:** + +* Gained support for ROPI (read-only position independence) and RWPI + (read-write position independence), which can be used to remove the need for + a dynamic linker. +* Gained support for execute-only code, which is placed in pages without read + permissions. +* Gained a machine scheduler for Cortex-R52. +* Gained support for XRay. +* Gained Thumb1 implementations for several compiler-rt builtins. It also + has some support for building the builtins for HF targets. +* Started using the generic bitreverse intrinsic instead of rbit. +* Gained very basic support for GlobalISel. + +A lot of work has also been done in LLD for ARM, which now supports more +relocations and TLS. Changes to the MIPS Target