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LLVM backend for 6502
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Evan Cheng 2a135ae530 This DAG combine BRCOND transformation can look pass truncate of the operand: 
//   %a = ...                                                                                                                                                                                  
    //   %b = and i32 %a, 2                                                                                                                                                                        
    //   %c = srl i32 %b, 1                                                                                                                                                                        
    //   brcond i32 %c ...                                                                                                                                                                         
    //                                                                                                                                                                                             
    // into                                                                                                                                                                                        
    //                                                                                                                                                                                             
    //   %a = ...                                                                                                                                                                                  
    //   %b = and i32 %a, 2                                                                                                                                                                        
    //   %c = setcc eq %b, 0                                                                                                                                                                       
    //   brcond %c ...

Make sure it restores local variable N1, which corresponds to the condition operand if it fails to match.

This apparently breaks TCE but since that backend isn't in the tree I don't have a test for it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115571 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-04 22:41:01 +00:00
autoconf Add support for viewing graphviz graphs with xdot.py. 2010-09-27 16:28:34 +00:00
bindings
cmake Update library dependencies. 2010-10-02 03:04:43 +00:00
docs AVX intrinsics and builtins were also added to clang 2010-10-04 22:07:22 +00:00
examples Convert a bunch of uses of 'bytecode' into 'bitcode'. This 2010-09-29 20:09:55 +00:00
include The pshufw instruction came about in MMX2 when SSE was introduced. Don't place 2010-10-04 20:24:01 +00:00
lib This DAG combine BRCOND transformation can look pass truncate of the operand: 2010-10-04 22:41:01 +00:00
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test The pshufw instruction came about in MMX2 when SSE was introduced. Don't place 2010-10-04 20:24:01 +00:00
tools Stop the build if cyclic library dependecies found. 2010-10-02 03:04:49 +00:00
unittests static_cast to long, otherwise MSVC 2008 won't compile. 2010-10-04 12:31:20 +00:00
utils remove reference to dead script. 2010-10-02 18:49:27 +00:00
website
build-for-llvm-top.sh
CMakeLists.txt Handle InstPrinter's on the CMake build. 2010-10-02 02:38:42 +00:00
configure Rename the AsmPrinter directory to InstPrinter for those targets that have 2010-10-01 22:39:28 +00:00
CREDITS.TXT Convert a bunch of uses of 'bytecode' into 'bitcode'. This 2010-09-29 20:09:55 +00:00
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Makefile.rules Makefile.rules: Fix breakage on cygming --enable-shared. 2010-10-04 02:32:21 +00:00
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README.txt Undoing test commit blank space. 2010-09-29 17:39:29 +00:00

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