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Mirror of https://github.com/RPCS3/llvm-mirror
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05c92790cf
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Lawrence Hu 05c92790cf Swap loop invariant GEP with loop variant GEP to allow more LICM. 
This patch changes the order of GEPs generated by Splitting GEPs
    pass, specially when one of the GEPs has constant and the base is
    loop invariant, then we will generate the GEP with constant first
    when beneficial, to expose more cases for LICM.

    If originally Splitting GEP generate the following:
      do.body.i:
        %idxprom.i = sext i32 %shr.i to i64
        %2 = bitcast %typeD* %s to i8*
        %3 = shl i64 %idxprom.i, 2
        %uglygep = getelementptr i8, i8* %2, i64 %3
        %uglygep7 = getelementptr i8, i8* %uglygep, i64 1032
      ...
    Now it genereates:
      do.body.i:
        %idxprom.i = sext i32 %shr.i to i64
        %2 = bitcast %typeD* %s to i8*
        %3 = shl i64 %idxprom.i, 2
        %uglygep = getelementptr i8, i8* %2, i64 1032
        %uglygep7 = getelementptr i8, i8* %uglygep, i64 %3
      ...

    For no-loop cases, the original way of generating GEPs seems to
    expose more CSE cases, so we don't change the logic for no-loop
    cases, and only limit our change to the specific case we are
    interested in.

llvm-svn: 248420
2015-09-23 19:25:30 +00:00
autoconf Don't use bashism/kshism of test ==. From Kamil Rytarowski. 2015-09-12 16:30:32 +00:00
bindings [bindings] Update Go bindings to DIBuilder 2015-09-06 02:22:15 +00:00
cmake [CMake] Adding ALWAYS_GENERATE option to symlink utility functions. 2015-09-18 21:08:32 +00:00
docs Nit cleanup in LangRef about dereferenceable metadata 2015-09-18 12:07:10 +00:00
examples Fix typo and test commit 2015-09-18 21:15:45 +00:00
include [docs] Update DominatorTree docs to clarify expectations around unreachable blocks 2015-09-23 18:39:37 +00:00
lib Swap loop invariant GEP with loop variant GEP to allow more LICM. 2015-09-23 19:25:30 +00:00
projects build: make libunwind a proper project 2015-04-25 01:47:39 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
test Swap loop invariant GEP with loop variant GEP to allow more LICM. 2015-09-23 19:25:30 +00:00
tools dsymutil: Resolve forward decls for types defined in clang modules. 2015-09-23 17:35:52 +00:00
unittests Add a unit test for r248341. 2015-09-22 23:42:47 +00:00
utils Remove extra 'nullptr' entry from an array in tablegen register info file. It should never have been accessed. 2015-09-22 05:37:16 +00:00
.arcconfig Updated phabricator server. 2014-04-07 03:57:04 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy Enable display of compiler diagnostics in clang-tidy by default. 2014-10-29 17:29:38 +00:00
.gitignore Minor updates to gitignore so that symlinks are ignored in the projects dir. 2015-07-07 20:24:58 +00:00
CMakeLists.txt [CMake] [Darwin] Need to set lto_library on CMAKE_MODULE_LINKER_FLAGS as well 2015-09-11 18:39:19 +00:00
CODE_OWNERS.TXT CODE_OWNERS.TXT is supposed to be sorted by surname 2015-09-07 00:41:40 +00:00
configure Don't use bashism/kshism of test ==. From Kamil Rytarowski. 2015-09-12 16:30:32 +00:00
CREDITS.TXT [WebAssembly] Initial WebAssembly backend 2015-06-29 23:51:55 +00:00
LICENSE.TXT Update for a new year. 2015-03-12 01:25:29 +00:00
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile [configure/make] Propagate names of build host tools when making BuildTools 2014-03-25 21:45:41 +00:00
Makefile.common
Makefile.config.in We're actually -Wmissing-field-initializers clean thanks to the cmake 2015-08-07 16:44:47 +00:00
Makefile.rules We're actually -Wmissing-field-initializers clean thanks to the cmake 2015-08-07 16:44:47 +00:00
README.txt Revert test commit at revision 233535. 2015-03-30 12:39:03 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you're writing a package for LLVM, see docs/Packaging.rst for our
suggestions.