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LLVM backend for 6502
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Renato Golin 6215f78195 Elide repeated register operand in Thumb1 instructions 
This patch makes the ARM backend transform 3 operand instructions such as
'adds/subs' to the 2 operand version of the same instruction if the first
two register operands are the same.

Example: 'adds r0, r0, #1' will is transformed to 'adds r0, #1'.

Currently for some instructions such as 'adds' if you try to assemble
'adds r0, r0, #8' for thumb v6m the assembler would throw an error message
because the immediate cannot be encoded using 3 bits.

The backend should be smart enough to transform the instruction to
'adds r0, #8', which allows for larger immediate constants.

Patch by Ranjeet Singh.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218521 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-26 16:14:29 +00:00
autoconf
bindings
cmake Add CMake check for libatomic. 2014-09-12 11:08:59 +00:00
docs fix a typo in doumentation index. 2014-09-26 06:59:15 +00:00
examples Add doInitialization/doFinalization to DataLayoutPass. 2014-09-10 21:27:43 +00:00
include Target: Fix build breakage. 2014-09-26 02:57:05 +00:00
lib Elide repeated register operand in Thumb1 instructions 2014-09-26 16:14:29 +00:00
projects
test Elide repeated register operand in Thumb1 instructions 2014-09-26 16:14:29 +00:00
tools llvm-vtabledump: Small cleanup 2014-09-26 08:01:23 +00:00
unittests [Support] Add type-safe alternative to llvm::format() 2014-09-25 20:30:58 +00:00
utils [mips] Add CCValAssign::[ASZ]ExtUpper and CCPromoteToUpperBitsInType and handle struct's correctly on big-endian N32/N64 return values. 2014-09-25 12:15:05 +00:00
.arcconfig
.clang-format
.clang-tidy Add .clang-tidy configuration file to provide LLVM-optimized defaults for 2014-09-08 13:30:00 +00:00
.gitignore
CMakeLists.txt Enabling LLVM & Clang to be cross-compiled using CMake from a single configuration command line 2014-09-03 23:21:18 +00:00
CODE_OWNERS.TXT Add Tom Stellard's role as 3.5 release manager. 2014-09-12 08:07:31 +00:00
configure
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in
Makefile.rules Revert my earlier change to add "all" as a dependency to check. In 2014-09-19 18:44:27 +00:00
README.txt

README.txt 

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