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LLVM backend for 6502
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7d6fe13efc
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Benjamin Kramer 7d6fe13efc Add some x86 specific dagcombines for conditional increments. 
(add Y, (sete  X, 0)) -> cmp X, 1; adc  0, Y
(add Y, (setne X, 0)) -> cmp X, 1; sbb -1, Y
(sub (sete  X, 0), Y) -> cmp X, 1; sbb  0, Y
(sub (setne X, 0), Y) -> cmp X, 1; adc -1, Y

for
  unsigned foo(unsigned a, unsigned b) {
    if (a == 0) b++;
    return b;
  }
we now get:
  foo:
    cmpl  $1, %edi
    movl  %esi, %eax
    adcl  $0, %eax
    ret
instead of:
  foo:
    testl %edi, %edi
    sete  %al
    movzbl  %al, %eax
    addl  %esi, %eax
    ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122364 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-21 21:41:44 +00:00
autoconf Use GZIPBIN instead of GZIP. Apparently gzip uses GZIP as an environment 2010-12-10 01:31:51 +00:00
bindings Try to fix ocaml bindings. 2010-10-08 00:36:21 +00:00
cmake Update cmake library dependencies. 2010-12-20 09:47:08 +00:00
docs Revert 122341. It breaks some darwin tests. 2010-12-21 17:25:43 +00:00
examples Fix missing includes of "llvm/Analysis/Passes.h" in the tutorials. Thanks 2010-11-16 17:28:22 +00:00
include Don't relax org or align. They change size as the relaxation happens, but they 2010-12-21 20:35:18 +00:00
lib Add some x86 specific dagcombines for conditional increments. 2010-12-21 21:41:44 +00:00
projects Regen configure 2010-12-12 21:42:01 +00:00
runtime Rename 'libprofile/exported_symbols.lst' to 'libprofile/libprofile.exports'. 2010-09-03 15:42:45 +00:00
test Add some x86 specific dagcombines for conditional increments. 2010-12-21 21:41:44 +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 2010 is upon us. 2010-01-09 18:40:31 +00:00
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 Remove trailing space. This is just an excuse to poke the 2010-10-05 20:32:15 +00:00
README.txt Undoing test commit blank space. 2010-09-29 17:39:29 +00:00

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