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Old fork of llvm-mirror, used on older RPCS3 builds
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55474c1f67
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Ulrich Weigand 55474c1f67 [SystemZ] Avoid LER on z13 due to partial register dependencies 
On the z13, it turns out to be more efficient to access a full
floating-point register than just the upper half (as done e.g.
by the LE and LER instructions).

Current code already takes this into account when loading from
memory by using the LDE instruction in place of LE.  However,
we still generate LER, which shows the same performance issues
as LE in certain circumstances.

This patch changes the back-end to emit LDR instead of LER to
implement FP32 register-to-register copies on z13.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263431 91177308-0d34-0410-b5e6-96231b3b80d8
2016-03-14 13:50:03 +00:00
bindings Kill LLVMAddTargetData 2016-02-16 00:22:02 +00:00
cmake cmake: include what you use 2016-03-08 18:56:00 +00:00
docs [libFuzzer] refresh docs more 2016-03-12 03:23:02 +00:00
examples [PM] Update Kaleidoscope with the new header file. 2016-03-11 12:10:15 +00:00
include Add facility to add/remove/check attribute on function and arguments. 2016-03-14 01:37:29 +00:00
lib [SystemZ] Avoid LER on z13 due to partial register dependencies 2016-03-14 13:50:03 +00:00
projects Remove autoconf support 2016-01-26 21:29:08 +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 [SystemZ] Avoid LER on z13 due to partial register dependencies 2016-03-14 13:50:03 +00:00
tools Add echo test for constant data arrays in the LLVM C API 2016-03-13 00:58:25 +00:00
unittests Remove some unused variables 2016-03-13 22:00:18 +00:00
utils [lit] Hack lit to allow a test suite to request that it is run "early". 2016-03-12 03:03:31 +00:00
.arcconfig
.clang-format
.clang-tidy adding readability-identifier-naming to llvm clang-tidy configuration. 2015-12-08 17:44:51 +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] Add test-depends target to build dependencies of check-all 2016-03-02 17:56:30 +00:00
CODE_OWNERS.TXT Add self to CODE_OWNERS 2016-03-08 19:01:15 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT [WebAssembly] Initial WebAssembly backend 2015-06-29 23:51:55 +00:00
LICENSE.TXT
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt
README.txt Revert previous test commit. 2016-01-04 19:13:29 +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 are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.