mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
checkpoint, this is still not comprehendible.
llvm-svn: 83530
This commit is contained in:
Chris Lattner
parent
289914c8d4
commit
8e4073ed26
@ -52,26 +52,8 @@ current one. To see the release notes for a specific release, please see the
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</div>
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Many new papers added to /pubs/
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Machine LICM, hoists things like constant pool loads, loads from readonly stubs, vector constant synthesization code, etc.
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Machine Sinking
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Regalloc improvements for commuting, various spiller peephole optimizations, cross-class coalescing.
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Support for debug line numbers when optimization enabled
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gold lto plugin
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target-specific intrinsics (r63765)
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<tt>llc -enable-value-prop</tt>, propagation of value info (sign/zero ext info) from one MBB to another
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interpreter + libffi
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LLVMContext
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Preliminary support for addrspace 256 -> GS, 257 -> FS, known problems: CodeGenerator.html#x86_memory
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Add support for the PowerPC 64-bit SVR4 ABI.
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NSW/NUW/exact div
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Inbounds for GEP
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SRoA improvements for vector unions, memset, arbitrary weird bitfield accesses etc. It now produces "strange" sized integers.
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pre-alloc splitter??
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X86: Support for softfloat modes, typically used by OS kernels.
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MC:
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MCSection, MCAsmInfo
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MCInstPrinter did it make it in?
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@ -83,94 +65,23 @@ Add support for the PowerPC 64-bit SVR4 ABI.
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ELF Writer? How stable?
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LSR promotes int induction variables to 64-bit on 64-bit targets, major perf boost for numerical code.
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LSR now analyzes pointer expressions (e.g. getelementptrs), not just integers.
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Stack slot coloring for register spills (denser stack frames)
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SelectionDAGS: New BuildVectorSDNode (r65296), and ISD::VECTOR_SHUFFLE (r69952 / PR2957)
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New PrettyStackTrace, crashes of llvm tools should give some indication of what the compiler was doing at the time of the crash (e.g. running a pass), and print out command line arguments.
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new linkage types linkonce_odr, weak_odr, linker_private, and available_externally.
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Inliner reuse stack space when inlining arrays?
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Regalloc hints for allocation stuff: Evan r73381/r73671. Finished/enabled?
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API Cleanup:
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no use of hash_set/hash_map, no more llvm::OStream
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Use raw_ostream for everything, killed off llvm/Streams.h and DOUT
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Mips now supports O32 Calling Convention
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StringRef class, Twine class.
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New BlackFin backend.
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APIs:
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Shrink wrapping support in PEI, what is the state of it?
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X86-64: better modeling of implicit zero extensions, eliminates a lot of redundant zexts
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X86-64 TLS support for local exec and initial exec.
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X86 - Better modeling of H registerts as subregs.
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Getelementpr instruction now allows any integer type for array/pointer indexes.
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include/llvm/Analysis/LiveValues.h => dead??
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lib/Analysis/LoopVR.cpp ==> dead??
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include/llvm/CodeGen/LazyLiveness.h ==> dead?
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lib/Transforms/IPO/MergeFunctions.cpp ==> dead?
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llvm/Analysis/PointerTracking.h ==> dead??
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PRedSimplify -> Ask vmkit if it is still useful and for testcases.
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ARM calling convention code is now tblgen generated instead of manual.
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ARM: NEON support. neonfp for doing single precision fp with neon instead of VFP.
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Tblgen now supports multiclass inheritance.
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Unladen swallow as user?
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Loop index split disabled by default?
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New WeakVH and AssertingVH and CallbackVH classes.
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New llvm/ADT/Triple class.
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Removed the IA64 backend.
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Profile info improvements by Andreas Neustifter.
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PostRA scheduler improvements David Goodwin.
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<!--
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Almost dead code.
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include/llvm/Analysis/LiveValues.h => dan
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lib/Analysis/LoopVR.cpp ==> dan/nick/owen
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lib/Transforms/IPO/MergeFunctions.cpp
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llvm/Analysis/PointerTracking.h
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-->
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New MSP430 and SystemZ backends.
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llvm-gcc now supports a new TCE target.
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klee web page at klee.llvm.org
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New llvm/System/Atomic.h, llvm/System/RWMutex.h for portable atomic ops, rw locks.
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llvm_start_multithreaded: ProgrammersMAnual.html#threading
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Tablegen now supports a number of new string and list operations like
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!(subst), !(foreach), !car, !cdr, !null, !if, !cast.
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New fadd, fsub, fmul instructions and classes.
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New MachineVerifier pass.
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Enabled GVN Load PRE.
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ARM AAPCS-VFP hard float ABI is supported.
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LLVM build now builds all libraries as .a files instead of some
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libraries as relinked .o files. This requires some APIs like
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InitializeAllTargets.h. TargetRegistry!
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ARM Thumb2 support: status?
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CBE status: not part of the release criteria.
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New SourceMgr, SMLoc classes for simple parsers with caret diagnostics and #include support, (used by
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tablegen, llvm-mc, the .ll parser, FileCheck, etc)
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FileCheck! + CHECK-NEXT
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New compiler-rt project.
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New Static Single Information (SSI) construction pass (not used by anything yet, experimental).
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llvm_report_error() error handling API (llvm/Support/ErrorHandling.h)
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x86: Vector icmp/fcmp now work with SSE codegen.
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X86: all global variable reference logic is now in ClassifyGlobalReference.
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JIT support for oprofile (r75279), configure with --with-oprofile. Now we get line # and function info for JIT'd functions.
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Mention gcc plugin.
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New EngineBuilder class for creating JITs: r76276 Reid Kleckner <reid at kleckner.net>
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-asm-verbose now prints location info (with -g) and loop nest info.
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JIT now supports generating more than 16M of code.
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removed the BigBlock register allocator, it had bitrotted.
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Target intrinsics can now return multiple results.
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SSE 4.2 support.
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Ada bindings for LLVM IR.
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Many extensions to the C APIs.
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<!-- Unfinished features in 2.6:
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Mention gcc plugin.
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@ -185,6 +96,10 @@ Target intrinsics can now return multiple results.
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Logo web page.
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llvm devmtg
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compiler_rt
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klee web page at klee.llvm.org
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Many new papers added to /pubs/
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Mention gcc plugin.
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-->
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<!-- *********************************************************************** -->
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@ -406,6 +321,7 @@ machine code using LLVM's JIT.</p>
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minor improvements. Some of the major improvements and new features are listed
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in this section.
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</p>
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</div>
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<!--=========================================================================-->
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@ -418,7 +334,15 @@ in this section.
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<p>LLVM 2.6 includes several major new capabilities:</p>
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<ul>
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<li>Something wonderful!</li>
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<li>Support for debug line numbers when optimization enabled</li>
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<li>gold lto plugin</li>
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<li>New MSP430 and SystemZ backends.</li>
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<li>New BlackFin backend.</li>
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<li>LLVMContext, llvm_start_multithreaded: ProgrammersManual.html#threading</li>
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<li>Unladen swallow as user?</li>
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<li>klee web page at klee.llvm.org</li>
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<li>FileCheck</li>
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<li>New compiler-rt project.</li>
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<li>LLVM 2.6 includes a brand new experimental LLVM bindings to the Ada2005 programming language.</li>
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</ul>
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@ -453,7 +377,14 @@ includes support for the C, C++, Objective-C, Ada, and Fortran front-ends.</p>
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can be useful if you are writing a front-end for LLVM:</p>
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<ul>
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<li>Something wonderful!</li>
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<li>Getelementpr instruction now allows any integer type for array/pointer indexes.</li>
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<li>Inbounds for GEP</li>
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<li>NSW/NUW/exact div</li>
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<li>LSR promotes int induction variables to 64-bit on 64-bit targets, major perf boost for numerical code.</li>
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<li>LSR now analyzes pointer expressions (e.g. getelementptrs), not just integers.</li>
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<li>new linkage types linkonce_odr, weak_odr, linker_private, and available_externally.</li>
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<li>New fadd, fsub, fmul instructions and classes. </li>
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<li>Target intrinsics can now return multiple results.</li>
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</ul>
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</div>
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@ -470,7 +401,11 @@ release includes a few major enhancements and additions to the optimizers:</p>
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<ul>
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<li>Something wonderful!</li>
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<li>SRoA improvements for vector unions, memset, arbitrary weird bitfield accesses etc. It now produces "strange" sized integers.</li>
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<li>Inliner reuse stack space when inlining arrays?</li>
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<li>Enabled GVN Load PRE.</li>
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<li>New Static Single Information (SSI) construction pass (not used by anything yet, experimental).</li>
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</li>
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</ul>
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@ -489,7 +424,22 @@ it run faster:</p>
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<ul>
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<li>Something wonderful!</li>
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<li> -asm-verbose now prints location info (with -g) and loop nest info.</li>
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<li>Tblgen now supports multiclass inheritance and a number of new string and
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list operations like !(subst), !(foreach), !car, !cdr, !null, !if, !cast.
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These make the .td files more expressive and allow more aggressive factoring
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of duplication across instruction patterns.</li>
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<li>New MachineVerifier pass.</li>
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<li>Machine LICM, hoists things like constant pool loads, loads from readonly stubs, vector constant synthesization code, etc.</li>
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<li>Machine Sinking</li>
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<li>target-specific intrinsics (r63765)</li>
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<li>Regalloc improvements for commuting, various spiller peephole optimizations, cross-class coalescing.</li>
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<li><tt>llc -enable-value-prop</tt>, propagation of value info (sign/zero ext info) from one MBB to another</li>
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<li>Regalloc hints for allocation stuff: Evan r73381/r73671. Finished/enabled?</li>
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<li>Stack slot coloring for register spills (denser stack frames)</li>
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<li>SelectionDAGS: New BuildVectorSDNode (r65296), and ISD::VECTOR_SHUFFLE (r69952 / PR2957)</li>
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<li>PostRA scheduler improvements David Goodwin.</li>
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</li>
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</ul>
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</div>
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@ -504,7 +454,16 @@ it run faster:</p>
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<ul>
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<li>Something wonderful!</li>
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<li>Preliminary support for addrspace 256 -> GS, 257 -> FS, known problems: CodeGenerator.html#x86_memory</li>
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<li>Support for softfloat modes, typically used by OS kernels.</li>
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<li>X86-64: better modeling of implicit zero extensions, eliminates a lot of redundant zexts</li>
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<li>X86-64 TLS support for local exec and initial exec.</li>
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<li>Better modeling of H registerts as subregs.</li>
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<li>Vector icmp/fcmp now work with SSE codegen.</li>
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<li>SSE 4.2 support.</li>
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<li>all global variable reference logic is now in ClassifyGlobalReference.</li>
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</li>
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</ul>
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</div>
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@ -519,18 +478,18 @@ it run faster:</p>
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</p>
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<ul>
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<li>Something wonderful!</li>
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<li>Support for floating-point, indirect function calls, and
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passing/returning aggregate types to functions.
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<li>The code generator is able to generate debug info into output COFF files.
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<li>Support for placing an object into a specific section or at a specific
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address in memory.</li>
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</ul>
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<p>Things not yet supported:</p>
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<ul>
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<li>Floating point.</li>
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<li>Passing/returning aggregate types to and from functions.</li>
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<li>Variable arguments.</li>
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<li>Indirect function calls.</li>
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<li>Interrupts/programs.</li>
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<li>Debug info.</li>
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</ul>
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</div>
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@ -554,21 +513,74 @@ AAPCS-VFP "hard float" calling conventions are also supported with the
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and subject to change. The Neon intrinsics, in particular, may change in future
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releases of LLVM.
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</li>
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ARM AAPCS-VFP hard float ABI is supported.
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ARM calling convention code is now tblgen generated instead of manual.
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ARM: NEON support. neonfp for doing single precision fp with neon instead of VFP.
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</ul>
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</div>
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<!--=========================================================================-->
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<div class="doc_subsection">
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<a name="llvmc">Improvements in LLVMC</a>
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<a name="OtherTarget">Other Target Specific Improvements</a>
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</div>
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<div class="doc_text">
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<p>New features include:</p>
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<p>New features of other targets include:
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</p>
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<ul>
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<li>Something wonderful!</li>
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<li>Add support for the PowerPC 64-bit SVR4 ABI.</li>
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<li>Mips now supports O32 Calling Convention.</li>
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</ul>
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</div>
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<!--=========================================================================-->
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<div class="doc_subsection">
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<a name="newapis">New Useful APIs</a>
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</div>
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<div class="doc_text">
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<ul>
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<li>New EngineBuilder class for creating JITs: r76276</li>
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New PrettyStackTrace, crashes of llvm tools should give some indication of what the compiler was doing at the time of the crash (e.g. running a pass), and print out command line arguments.
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StringRef class, Twine class.
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New WeakVH and AssertingVH and CallbackVH classes.
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New llvm/ADT/Triple class.
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llvm_report_error() error handling API (llvm/Support/ErrorHandling.h)
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New llvm/System/Atomic.h, llvm/System/RWMutex.h for portable atomic ops, rw locks.
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New SourceMgr, SMLoc classes for simple parsers with caret diagnostics and #include support, (used by
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tablegen, llvm-mc, the .ll parser, FileCheck, etc)
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<ul>
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</div>
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<!--=========================================================================-->
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<div class="doc_subsection">
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<a name="otherimprovements">Other Improvements and New Features</a>
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</div>
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<div class="doc_text">
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<p>Other miscellaneous features include:</p>
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<ul>
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<li>interpreter + libffi</li>
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<li> JIT now supports generating more than 16M of code.</li>
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<li>Users can now <a
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||||
href="http://llvm.org/doxygen/classllvm_1_1ExecutionEngine.html#fcd2b4b92ca38812ca31640b0da14927">register</a>
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a <a href="http://llvm.org/doxygen/classllvm_1_1JITEventListener.html">JITEventListener</a>
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||||
to receive callbacks when the JIT emits or frees machine code. The
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OProfile support uses this mechanism.</li>
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JIT support for oprofile (r75279), configure with --with-oprofile. Now we get line # and function info for JIT'd functions.
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<li> Profile info improvements by Andreas Neustifter.</li>
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<li> Many extensions to the C APIs.</li>
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</ul>
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</div>
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@ -587,14 +599,23 @@ from the previous release.</p>
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<ul>
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||||
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||||
<li>Something horrible!</li>
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||||
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||||
<li>The Itanium (IA64) backend has been removed. It was not supported and
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bitrotted.</li>
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<li>The BigBlock register allocator has been removed, it also bitrotted.</li>
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<li>The C Backend (-march=c) is no longer considered part of the LLVM release
|
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criteria. We still want it to work, but no one is maintaining it and it lacks
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support for arbitrary precision integers and other important IR features.</li>
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</ul>
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<p>In addition, many APIs have changed in this release. Some of the major LLVM
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||||
API changes are:</p>
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||||
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||||
API Cleanup:
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no use of hash_set/hash_map, no more llvm::OStream
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Use raw_ostream for everything, killed off llvm/Streams.h and DOUT
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<ul>
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<li>LLVM's global uniquing tables for <tt>Type</tt>s and <tt>Constant</tt>s have
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been privatized into members of an <tt>LLVMContext</tt>. A number of APIs
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@ -724,7 +745,7 @@ using the stock GCC 3.x.x series 'out the box',
|
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See: <a href="#brokengcc">Broken versions of GCC and other tools</a>.
|
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However, A <a href="http://pkg.auroraux.org/GCC">Modern GCC Build</a>
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for x86/x64 has been made available from the third party AuroraUX Project
|
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that has been meticulously tested for bootstrapping LLVM & Clang.</li>
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that has been meticulously tested for bootstrapping LLVM & Clang.</li>
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</ul>
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</div>
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@ -809,9 +830,6 @@ processors, thumb programs can crash or produce wrong
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results (<a href="http://llvm.org/PR1388">PR1388</a>).</li>
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<li>Compilation for ARM Linux OABI (old ABI) is supported but not fully tested.
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</li>
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<li>There is a bug in QEMU-ARM (<= 0.9.0) which causes it to incorrectly
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||||
execute
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programs compiled with LLVM. Please use more recent versions of QEMU.</li>
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</ul>
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||||
</div>
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||||
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||||
Loading…
Reference in New Issue
Block a user