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LLVM backend for 6502
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b1b738e036
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David Majnemer b1b738e036 InstCombine: (icmp eq B, 0) | (icmp ult A, B) -> (icmp ule A, B-1) 
This transform allows us to turn IR that looks like:
  %1 = icmp eq i64 %b, 0
  %2 = icmp ult i64 %a, %b
  %3 = or i1 %1, %2
  ret i1 %3

into:
  %0 = add i64 %b, -1
  %1 = icmp uge i64 %0, %a
  ret i1 %1

which means we go from lowering:
        cmpq    %rsi, %rdi
        setb    %cl
        testq   %rsi, %rsi
        sete    %al
        orb     %cl, %al
        ret

to lowering:
        decq    %rsi
        cmpq    %rdi, %rsi
        setae   %al
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185677 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-05 00:31:17 +00:00
autoconf Reapply r185601 with a fix for the cmake build. 2013-07-04 01:10:38 +00:00
bindings We're in 3.4 land now. 2013-05-07 20:31:28 +00:00
cmake Reapply r185601 with a fix for the cmake build. 2013-07-04 01:10:38 +00:00
docs Add platform specific tests doc 2013-07-03 20:56:33 +00:00
examples ExceptionDemo: Corresponding to r181820, SectionMemoryManager should belong to RTDyldMemoryManager. 2013-05-14 23:05:00 +00:00
include Remove use of asymmetric std::lower_bound comparator. 2013-07-04 23:20:12 +00:00
lib InstCombine: (icmp eq B, 0) | (icmp ult A, B) -> (icmp ule A, B-1) 2013-07-05 00:31:17 +00:00
projects The build system is currently miss-identifying GNU/kFreeBSD as FreeBSD. 2013-07-01 08:07:52 +00:00
runtime Remove "-Wl,-seg1addr -Wl,0xE0000000" from link options. 2013-06-04 15:26:37 +00:00
test InstCombine: (icmp eq B, 0) | (icmp ult A, B) -> (icmp ule A, B-1) 2013-07-05 00:31:17 +00:00
tools Make llvm-nm return 1 on error. 2013-07-03 15:46:03 +00:00
unittests Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size. 2013-07-04 01:31:24 +00:00
utils Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size. 2013-07-04 01:31:24 +00:00
.arcconfig Add .arcconfig to the repository. Useful if someone wants to use phabricator's command line tool. 2012-12-01 12:07:58 +00:00
.gitignore
CMakeLists.txt Support using "host" as a target in LLVM_TARGETS_TO_BUILD when using cmake. 2013-06-26 07:57:53 +00:00
CODE_OWNERS.TXT Add more owners to CODE_OWNERS.TXT (Kostya Serebryany: AddressSanitizer and ThreadSanitizer; Evgeniy Stepanov: MemorySanitizer) 2013-06-27 08:47:12 +00:00
configure Reapply r185601 with a fix for the cmake build. 2013-07-04 01:10:38 +00:00
CREDITS.TXT Identify me on IRC. 2013-06-18 22:09:36 +00:00
LICENSE.TXT Be more specific and capitalize filenames. 2013-05-21 21:22:34 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile Fix regular expression used by 'make update' to only look for 'I' and '?' at the start of svn info results and to check for spaces after 'I' instead of just after '?'. 2013-07-03 14:48:37 +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 an autoconf option for turning on -gsplit-dwarf by default 2013-06-25 01:12:25 +00:00
Makefile.rules The build system is currently miss-identifying GNU/kFreeBSD as FreeBSD. 2013-07-01 08:07:52 +00:00
README.txt test 2013-04-17 05:34:03 +00:00

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