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LLVM backend for 6502
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Erik Eckstein c394c42d6d Peephole optimization in switch table lookup: reuse the guarding table comparison if possible. 
This optimization tries to reuse the generated compare instruction, if there is a comparison against the default value after the switch.
Example:
    if (idx < tablesize)
       r = table[idx]; // table does not contain default_value
    else
       r = default_value;
    if (r != default_value)
       ...
Is optimized to:
    cond = idx < tablesize;
    if (cond)
       r = table[idx];
    else
       r = default_value;
    if (cond)
       ...
\endcode
Jump threading will then eliminate the second if(cond).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222872 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-27 08:33:51 +00:00
autoconf Expose LLVM version string via macro in llvm-config.h, and modify Go bindings 2014-11-19 03:34:17 +00:00
bindings Reformat with gofmt. 2014-11-26 02:57:33 +00:00
cmake Teach LLVM about llgo subproject. 2014-11-27 00:15:21 +00:00
docs Remove neverHasSideEffects support from TableGen CodeGenInstruction. Everyone should use hasSideEffects now. 2014-11-26 04:11:14 +00:00
examples [CMake] llvm/examples: Update libdeps for unoptimized builds. 2014-10-31 15:27:16 +00:00
include [MCJIT] Replace JITEventListener::anchor (temporarily removed in r222861), and 2014-11-27 01:41:16 +00:00
lib Peephole optimization in switch table lookup: reuse the guarding table comparison if possible. 2014-11-27 08:33:51 +00:00
projects [cmake] Use the external project machinery for libcxxabi so that it can 2014-07-25 10:27:40 +00:00
test Peephole optimization in switch table lookup: reuse the guarding table comparison if possible. 2014-11-27 08:33:51 +00:00
tools [MCJIT] Update CMakeLists.txt for llvm-rtdyld to add Object as a requirement. 2014-11-27 04:18:50 +00:00
unittests Cleaning out google tests from MC. 2014-11-25 18:03:08 +00:00
utils Add a small "usage:" comment at the top of not.cpp 2014-11-26 22:53:46 +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 Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
CMakeLists.txt Use ninja pools to limit the number of concurrent compile/link jobs. 2014-11-19 10:30:02 +00:00
CODE_OWNERS.TXT Add Tom Stellard's role as 3.5 release manager. 2014-09-12 08:07:31 +00:00
configure Expose LLVM version string via macro in llvm-config.h, and modify Go bindings 2014-11-19 03:34:17 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT Remove projects/sample. 2014-03-12 22:40:22 +00:00
llvm.spec.in
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.common: Update a description, s/Source/SOURCES/ , according to MakefileGuide.html#control-variables . 2012-12-07 01:43:23 +00:00
Makefile.config.in Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
Makefile.rules Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
README.txt Trivial test commit. 2014-04-26 19:05:45 +00:00

README.txt 

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

This directory and its subdirectories contain source code for the Low Level
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Please see the documentation provided in docs/ for further
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