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LLVM backend for 6502
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Benjamin Kramer f50125ecaa DAGCombine add (sext i1), X into sub X, (zext i1) if sext from i1 is illegal. The latter usually compiles into smaller code. 
example code:
unsigned foo(unsigned x, unsigned y) {
  if (x != 0) y--;
  return y;
}

before:
  _foo:                           ## @foo
    cmpl  $1, 4(%esp)             ## encoding: [0x83,0x7c,0x24,0x04,0x01]
    sbbl  %eax, %eax              ## encoding: [0x19,0xc0]
    notl  %eax                    ## encoding: [0xf7,0xd0]
    addl  8(%esp), %eax           ## encoding: [0x03,0x44,0x24,0x08]
    ret                           ## encoding: [0xc3]

after:
  _foo:                           ## @foo
    cmpl  $1, 4(%esp)             ## encoding: [0x83,0x7c,0x24,0x04,0x01]
    movl  8(%esp), %eax           ## encoding: [0x8b,0x44,0x24,0x08]
    adcl  $-1, %eax               ## encoding: [0x83,0xd0,0xff]
    ret                           ## encoding: [0xc3]



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122455 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-22 23:17:45 +00:00
autoconf Use GZIPBIN instead of GZIP. Apparently gzip uses GZIP as an environment 2010-12-10 01:31:51 +00:00
bindings
cmake Fixes file extension for loadable modules on OS X. 2010-12-22 08:30:17 +00:00
docs Revert 122341. It breaks some darwin tests. 2010-12-21 17:25:43 +00:00
examples
include Constify. 2010-12-22 22:10:08 +00:00
lib DAGCombine add (sext i1), X into sub X, (zext i1) if sext from i1 is illegal. The latter usually compiles into smaller code. 2010-12-22 23:17:45 +00:00
projects Regen configure 2010-12-12 21:42:01 +00:00
runtime
test DAGCombine add (sext i1), X into sub X, (zext i1) if sext from i1 is illegal. The latter usually compiles into smaller code. 2010-12-22 23:17:45 +00:00
tools Support/PathV1: Deprecate get{Basename,Dirname,Suffix}. 2010-12-18 22:23:07 +00:00
unittests Add ADT/IntEqClasses.h as a light-weight implementation of EquivalenceClasses.h. 2010-12-21 00:04:46 +00:00
utils Revert 122341. It breaks some darwin tests. 2010-12-21 17:25:43 +00:00
website
.gitignore Cleanup and document .gitignore. 2010-12-17 17:22:50 +00:00
build-for-llvm-top.sh
CMakeLists.txt New cmake option LLVM_APPEND_VC_REV for controlling when the VC 2010-12-20 09:47:13 +00:00
configure Use GZIPBIN instead of GZIP. Apparently gzip uses GZIP as an environment 2010-12-10 01:31:51 +00:00
CREDITS.TXT Another git svn dcommit test. This time let's hope it doesn't kill my repo. 2010-12-10 14:45:10 +00:00
LICENSE.TXT
llvm.spec.in
Makefile Merge System into Support. 2010-11-29 18:16:10 +00:00
Makefile.common
Makefile.config.in Use GZIPBIN instead of GZIP. Apparently gzip uses GZIP as an environment 2010-12-10 01:31:51 +00:00
Makefile.rules build: Shared libraries shouldn't used RPATH on Darwin, only main executables 2010-12-08 02:29:26 +00:00
ModuleInfo.txt
README.txt

README.txt 

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