From f304ffcb4c639f088e5253c834643d2c59ba6c60 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sun, 10 Feb 2008 08:17:19 +0000 Subject: [PATCH] final set of major updates git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46923 91177308-0d34-0410-b5e6-96231b3b80d8 --- docs/ReleaseNotes.html | 137 +++++++++++++++++++++++++---------------- 1 file changed, 83 insertions(+), 54 deletions(-) diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html index ebc0fd7374a..45e3606bee7 100644 --- a/docs/ReleaseNotes.html +++ b/docs/ReleaseNotes.html @@ -138,10 +138,15 @@ href="http://llvm.org/PR1971">not support EQUIVALENCE yet. bits) and on Darwin PPC/PPC64 (where it is 128 bits). In previous LLVM releases, llvm-gcc silently mapped long double to double. -
  • Gordon rewrote most of the Accurate Garbage -Collection code in the code generator, making the generated code more -efficient and adding support for the Ocaml garbage collector metadata -format.
    • +
  • Gordon Henriksen rewrote most of the Accurate Garbage Collection code in the code generator, making the +generated code more efficient and adding support for the Ocaml garbage collector +metadata format.
    • + +
  • Christopher Lamb contributed support for multiple address spaces in LLVM +IR. This is useful for supporting targets that have 'near' vs 'far' pointers, +'RAM' vs 'ROM' pointers, or that have non-local memory that can be accessed with +special instructions.
  • LLVM now includes a new set of detailed tutorials, which explain how to implement a @@ -149,6 +154,44 @@ language with LLVM and shows how to use several important APIs.
    • + +
    +LLVM Core Improvements +
    + +
    +

    New features include: +

    + + + +
    +
    Code Generator Improvements @@ -211,15 +254,15 @@ more consistent, and better documented.
    -

    In addition to a huge array of bug fixes and minor performance tweaks, LLVM -2.2 supports a few major enhancements:

    +

    In addition to a huge array of bug fixes and minor performance tweaks, the +LLVM 2.2 optimizers support a few major enhancements:

    • Daniel Berlin and Curtis Dunham rewrote Andersen's alias analysis to be -several orders of magnitude faster, implemented Offline Variable Substitution -and Lazy Cycle Detection. Note that Andersen's is not enabled in llvm-gcc by -default.
      • +several orders of magnitude faster, and implemented Offline Variable +Substitution and Lazy Cycle Detection. Note that Andersen's is not enabled in +llvm-gcc by default, but can be accessed through 'opt'.
    • Dan Gohman contributed several enhancements to Loop Strength Reduction (LSR) to make it more aggressive with SSE intrinsics.
      • @@ -240,48 +283,23 @@ variables have different widths.
    -

    New features include: +

    New target-specific features include:

      -
    • Evan X86 now models EFLAGS in instructions.
      • -
    • Evan: If conversion on by default for ARM.
      • -
    • Bruno: MIPS PIC support.
      • -
    • Arnold Schwaighofer: X86 tail call support.
      • -
    • Dale darwin/x86-64 and darwin/ppc eh
      • -
    • Evan: darwin/x86 debug info, improvements at -O0?
      • -
    - -
    - - -
    -LLVM Core Improvements -
    - -
    -

    New features include: -

    - -
      -
    • Devang added LLVMFoldingBuilder.
      • -
    • Dan added support for vector sin, cos, and pow intrinsics.
      • -
    • Ted added a framework for generic object serialization to bitcode files, - only used by clang right now for ASTs but could be used for other - stuff.
      • -
    • Duncan fixed TargetData to distinguish between the size/alignment of a type - in a register, in memory according to the platform ABI, and in memory when - we have a choice.
      • -
    • Duncan moved parameter attributes off of function type and onto functions - and calls, which makes it much easier to add attributes to a function in a - transformation.
      • -
    • Christopher Lamb: Multiple address spaces.
      • -
    • Gordon: C and Ocaml Bindings
      • - -
    • Anton added readnone/readonly attributes for modeling function side effects -and Duncan hooked up GCC's pure/const attributes to use them and enhanced alias -analysis to use them.
      • - +
    • Evan contributed support to the X86 backend to model the mod/ref behavior +of the EFLAGS register explicitly in all instructions. This gives more freedom +to the scheduler, and is a more explicit way to model the instructions.
      • +
    • Dale contributed support for exception handling on Darwin/x86-64 and +Darwin/ppc.
      • +
    • Evan turned on if-conversion by default for ARM, allowing LLVM to take +advantage of its predication features.
      • +
    • Bruno added PIC support to the MIPS backend, fixed many bugs and improved +support for architecture variants.
      • +
    • Arnold Schwaighofer added support for X86 tail calls (limitations? +details?).
      • +
    • Evan contributed several enhancements to Darwin/x86 debug information, +and improvements at -O0 (details?).
    @@ -296,9 +314,18 @@ analysis to use them.

    @@ -387,6 +414,8 @@ components, please contact us on the alignment problems on operating systems that don't require 16-byte stack alignment (including most non-darwin OS's like linux). +
  • The X86 backend generates inefficient floating point code when configured to + generate code for systems that don't have SSE2.
    • @@ -418,7 +447,7 @@ processors, thumb programs can crash or produce wrong results (PR1388).
  • Compilation for ARM Linux OABI (old ABI) is supported, but not fully tested.
    • -
  • There is a bug in QEMU-ARM (<= 0.9.0) which causes it to incorrectly execute +
  • There is a bug in QEMU-ARM (<= 0.9.0) which causes it to incorrectly execute programs compiled with LLVM. Please use more recent versions of QEMU.
    • @@ -550,11 +579,11 @@ llvmdev mailing list if you are interested.

    const, constructor, destructor, deprecated, fastcall, format, format_arg, non_null, noinline, - noreturn, pure, regparm + noreturn, nothrow, pure, regparm section, stdcall, unused, used, visibility, warn_unused_result, weak
    - Ignored: nothrow, malloc, + Ignored: malloc, no_instrument_function