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author | Chris Lattner <sabre@nondot.org> | 2010-09-30 16:31:33 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2010-09-30 16:31:33 +0000 |
commit | 6ec05f6858c2ee974b1e52a456ed992f5e2558d1 (patch) | |
tree | b400416a0b2177209cc00d7e10d56f4b85fdc569 /docs | |
parent | 3861bff6bb731f14852a26b3fd5c76042271b6cc (diff) | |
download | external_llvm-6ec05f6858c2ee974b1e52a456ed992f5e2558d1.zip external_llvm-6ec05f6858c2ee974b1e52a456ed992f5e2558d1.tar.gz external_llvm-6ec05f6858c2ee974b1e52a456ed992f5e2558d1.tar.bz2 |
checkpoint notes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115152 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
-rw-r--r-- | docs/ReleaseNotes.html | 74 |
1 files changed, 50 insertions, 24 deletions
diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html index c9fa2fe..41d947d 100644 --- a/docs/ReleaseNotes.html +++ b/docs/ReleaseNotes.html @@ -103,7 +103,28 @@ Almost dead code. changing between equvivalent opcodes where possible. Support for the Intel AES instructions in the assembler. memcpy, memmove, and memset now take address space qualified pointers + volatile. - + per-instruction debug info metadata is much faster and uses less space (new DebugLoc class). + -ffunction-sections and -fdata-sections are supported on ELF targets. + Now iterate function passes when a cgsccpassmanager detects a devirtualization + -momit-leaf-frame-pointer now supported. + New -regalloc=fast, =local got removed + New -regalloc=default option that chooses a register allocator based on the -O optimization level. + New "trap values" concept: http://llvm.org/docs/LangRef.html#trapvalues + Improved trip count analysis for <= and >= loops, and uses sign overflow info. + REMOVED: SCCVN pass. + X86 backend attempts to promote 16-bit integer operations to 32-bits to avoid + 0x66 prefixes, which are slow on some microarchitectures and bloat the code + on others. + X87 fp stackifier is global! + LTO debug info support? + NEON: Better performance for QQQQ (4-consecutive Q register) instructions. New reg sequence abstraction? + New support for X86 "thiscall" calling convention (x86_thiscallcc in IR). + ARM: Better scheduling (list-hybrid, hybrid?) + New SubRegIndex tblgen class for targets -> jakob + ARM: Tail call support. + AVX support in the MC assembler. Full compiler support not done yet. + Atomics now get legalized when not natively supported (jim g) + ARM: General performance work and tuning. --> @@ -145,6 +166,7 @@ production-quality compiler for C, Objective-C, C++ and Objective-C++ on x86 <ul> <li>Surely these guys have done something</li> +<li>X86-64 abi improvements? Did they make it in?</li> </ul> </div> @@ -247,29 +269,6 @@ supported, and only on linux and darwin (darwin needs an additional gcc patch). <!--=========================================================================--> <div class="doc_subsection"> -<a name="mc">llvm-mc: Machine Code Toolkit</a> -</div> - -<div class="doc_text"> -<p> -The LLVM Machine Code (aka MC) sub-project of LLVM was created to solve a number -of problems in the realm of assembly, disassembly, object file format handling, -and a number of other related areas that CPU instruction-set level tools work -in. It is a sub-project of LLVM which provides it with a number of advantages -over other compilers that do not have tightly integrated assembly-level tools. -For a gentle introduction, please see the <a -href="http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html">Intro to the -LLVM MC Project Blog Post</a>. -</p> - -<p>2.8 status here. Basic correctness, some obscure missing instructions on - mainline, on by default in clang. - Entire compiler backend converted to use mcstreamer. - </p> -</div> - -<!--=========================================================================--> -<div class="doc_subsection"> <a name="lldb">LLDB: Low Level Debugger</a> </div> @@ -587,6 +586,33 @@ release includes a few major enhancements and additions to the optimizers:</p> <!--=========================================================================--> <div class="doc_subsection"> +<a name="mc">MC Level Improvements</a> +</div> + +<div class="doc_text"> +<p> +FIXME: Rewrite. + +The LLVM Machine Code (aka MC) sub-project of LLVM was created to solve a number +of problems in the realm of assembly, disassembly, object file format handling, +and a number of other related areas that CPU instruction-set level tools work +in. It is a sub-project of LLVM which provides it with a number of advantages +over other compilers that do not have tightly integrated assembly-level tools. +For a gentle introduction, please see the <a +href="http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html">Intro to the +LLVM MC Project Blog Post</a>. +</p> + +<p>2.8 status here. Basic correctness, some obscure missing instructions on + mainline, on by default in clang. + Entire compiler backend converted to use mcstreamer. + </p> +</div> + + + +<!--=========================================================================--> +<div class="doc_subsection"> <a name="codegen">Target Independent Code Generator Improvements</a> </div> |