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b1b738e036
llvm-6502/lib
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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
..
Analysis Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size. 2013-07-04 01:31:24 +00:00
AsmParser Added support for the Builtin attribute. 2013-06-27 00:25:01 +00:00
Bitcode
CodeGen Initialize object file info before output streamer 2013-07-04 21:37:26 +00:00
DebugInfo Spell correct (s/begining/beginning/) 2013-06-19 21:42:05 +00:00
ExecutionEngine Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size. 2013-07-04 01:31:24 +00:00
IR DebugInfo: Consider global variables without locations to be valid 2013-07-04 23:15:18 +00:00
IRReader keep only the StringRef version of getFileOrSTDIN. 2013-06-25 05:28:34 +00:00
Linker Extend RemapInstruction and friends to take an optional new parameter, a ValueMaterializer. 2013-05-28 15:17:05 +00:00
MC Remove use of asymmetric std::lower_bound comparator. 2013-07-04 23:20:12 +00:00
Object Add support for archives with no symbol table or string table. 2013-07-04 19:40:23 +00:00
Option Fix a crash bug in dumping options with groups 2013-06-26 22:43:37 +00:00
Support Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size. 2013-07-04 01:31:24 +00:00
TableGen keep only the StringRef version of getFileOrSTDIN. 2013-06-25 05:28:34 +00:00
Target Use a OwningPtr instead of a manual delete. 2013-07-04 22:15:33 +00:00
Transforms InstCombine: (icmp eq B, 0) | (icmp ult A, B) -> (icmp ule A, B-1) 2013-07-05 00:31:17 +00:00
CMakeLists.txt Move lib/Archive to tools/llvm-ar. 2013-06-17 15:47:20 +00:00
LLVMBuild.txt Move lib/Archive to tools/llvm-ar. 2013-06-17 15:47:20 +00:00
Makefile Move lib/Archive to tools/llvm-ar. 2013-06-17 15:47:20 +00:00