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Matthias Braun ff881427ec TargetRegisterInfo: Make the concept of imprecise lane masks explicit 
LaneMasks as given by getSubRegIndexLaneMask() have a limited number of
of bits, so for targets with more than 31 disjunct subregister there may
be cases where:

   getSubReg(Reg,A) does not overlap getSubReg(Reg,B)

but we still have

   (getSubRegIndexLaneMask(A) & getSubRegIndexLaneMask(B)) != 0.

I had hoped to keep this an implementation detail of the tablegen but as
my next commit shows we can avoid unnecessary imp-defs operands if we
know that the lane masks in use are precise.

This is in preparation to http://reviews.llvm.org/D10470.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239837 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-16 18:22:26 +00:00
autoconf configure: Remove non-portable fall-through operator: ;& 2015-06-13 03:46:48 +00:00
bindings Add safestack attribute to LLVMAttribute enum and Go bindings. Correct 2015-06-15 22:16:51 +00:00
cmake Repair cmake libatomic check. 2015-06-16 14:00:01 +00:00
docs Protection against stack-based memory corruption errors using SafeStack 2015-06-15 21:07:11 +00:00
examples BrainF.cpp: Update CreateCall() according to r237624. 2015-05-19 06:50:19 +00:00
include TargetRegisterInfo: Make the concept of imprecise lane masks explicit 2015-06-16 18:22:26 +00:00
lib TargetRegisterInfo: Make the concept of imprecise lane masks explicit 2015-06-16 18:22:26 +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 Have MachOObjectFile::isValidArch() accept armv7 2015-06-16 17:37:03 +00:00
tools Replace string GNU Triples with llvm::Triple in TargetMachine::getTargetTriple(). NFC. 2015-06-16 13:15:50 +00:00
unittests llvm/unittests/Support/Path.cpp: Use <windows.h> instead of <Windows.h>. 2015-06-16 06:46:16 +00:00
utils [CodeGen] Introduce a FAULTING_LOAD_OP pseudo-op. 2015-06-15 18:44:08 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore Ignore compile_commands.json only at the root of the tree. 2015-03-26 18:55:42 +00:00
CMakeLists.txt R600 -> AMDGPU rename 2015-06-13 03:28:10 +00:00
CODE_OWNERS.TXT Added Andrey Churbanov as the owner of the OpenMP runtime library code 2015-05-05 20:17:53 +00:00
configure configure: Remove non-portable fall-through operator: ;& 2015-06-13 03:46:48 +00:00
CREDITS.TXT
LICENSE.TXT Update for a new year. 2015-03-12 01:25:29 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Deprecate in-source autotools builds 2015-05-04 02:04:54 +00:00
Makefile.rules
README.txt Revert test commit at revision 233535. 2015-03-30 12:39:03 +00:00

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