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LLVM backend for 6502
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a5d0ab5553
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Bill Schmidt a5d0ab5553 The PowerPC VRSAVE register has been somewhat of an odd beast since 
the Altivec extensions were introduced.  Its use is optional, and
allows the compiler to communicate to the operating system which
vector registers should be saved and restored during a context switch.
In practice, this information is ignored by the various operating
systems using the SVR4 ABI; the kernel saves and restores the entire
register state.  Setting the VRSAVE register is no longer performed by
the AIX XL compilers, the IBM i compilers, or by GCC on Power Linux
systems.  It seems best to avoid this logic within LLVM as well.

This patch avoids generating code to update and restore VRSAVE for the
PowerPC SVR4 ABIs (32- and 64-bit).  The code remains in place for the
Darwin ABI.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165656 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-10 20:54:15 +00:00
autoconf Re-enable support for --program-prefix. 2012-10-01 18:40:32 +00:00
bindings Fix the ocaml binding breakage from TargetData -> DataLayout changes. 2012-10-08 17:06:25 +00:00
cmake [CMake] add_lit_testsuite: EXCLUDE_FROM_ALL excludes the test ${target} out of check-all. 2012-10-10 13:32:55 +00:00
docs docs: Propagate fix from r165632 to other docs. 2012-10-10 17:21:39 +00:00
examples Move TargetData to DataLayout. 2012-10-08 16:37:04 +00:00
include tblgen: Put dyn_cast<> machinery in place for Init hierarchy. 2012-10-10 20:24:40 +00:00
lib The PowerPC VRSAVE register has been somewhat of an odd beast since 2012-10-10 20:54:15 +00:00
projects Re-enable support for --program-prefix. 2012-10-01 18:40:32 +00:00
runtime Place temporary LTO files into their own subdirectory. 2012-10-10 05:29:15 +00:00
test The PowerPC VRSAVE register has been somewhat of an odd beast since 2012-10-10 20:54:15 +00:00
tools Place temporary LTO files into their own subdirectory. 2012-10-10 05:29:15 +00:00
unittests Move TargetData to DataLayout. 2012-10-08 16:39:34 +00:00
utils tblgen: Compile TableGen without RTTI. 2012-10-10 20:27:18 +00:00
.gitignore Add extra vim swap file pattern 2012-10-09 23:48:34 +00:00
CMakeLists.txt Removing dependency on third party library for Intel JIT event support. 2012-09-28 17:35:20 +00:00
CODE_OWNERS.TXT Add the list of code owners to the top level of the LLVM source tree to 2012-07-26 08:04:09 +00:00
configure Re-enable support for --program-prefix. 2012-10-01 18:40:32 +00:00
CREDITS.TXT Move TargetData to DataLayout. 2012-10-08 16:40:38 +00:00
LICENSE.TXT Add YAML parser to Support. 2012-04-03 23:09:22 +00:00
llvm.spec.in Tidy up. s/Low Level Virtual Machine/LLVM/. 2012-01-25 22:00:23 +00:00
LLVMBuild.txt LLVMBuild: Introduce a common section which currently has a list of the 2011-12-12 22:45:54 +00:00
Makefile Remove dead variable. 2012-10-10 18:20:49 +00:00
Makefile.common [docs] Remove unsupported references to ExtraSource variable. 2012-05-15 21:32:27 +00:00
Makefile.config.in Re-enable support for --program-prefix. 2012-10-01 18:40:32 +00:00
Makefile.rules Place temporary LTO files into their own subdirectory. 2012-10-10 05:29:15 +00:00
README.txt test commit 2012-07-11 17:34:12 +00:00

README.txt 

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

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Please see the HTML documentation provided in docs/index.html for further
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