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Sanjay Patel cbb0450540 [InstCombine] add folds for icmp + sub (PR36969) 
(A - B) >u A --> A <u B
C <u (C - D) --> C <u D

https://rise4fun.com/Alive/e7j

Name: ugt
  %sub = sub i8 %x, %y
  %cmp = icmp ugt i8 %sub, %x
=>
  %cmp = icmp ult i8 %x, %y
  
Name: ult
  %sub = sub i8 %x, %y
  %cmp = icmp ult i8 %x, %sub
=>
  %cmp = icmp ult i8 %x, %y

This should fix:
https://bugs.llvm.org/show_bug.cgi?id=36969

llvm-svn: 329011
 		2018-04-02 20:37:40 +00:00
..
Analysis [SLP] Fix PR36481: vectorize reassociated instructions. 2018-04-02 14:51:37 +00:00
AsmParser [SimplifyCFG] Create attribute for fuzzing-specific optimizations. 2018-03-22 17:07:51 +00:00
BinaryFormat Fix build broken by r328090 2018-03-21 12:18:03 +00:00
Bitcode [ThinLTO] Add an option to force summary call edges cold for debugging 2018-03-31 00:18:08 +00:00
CodeGen [dsymutil] Upstream emitting of papertrail warnings. 2018-04-02 10:40:43 +00:00
DebugInfo [llvm-pdbutil] Add an export subcommand. 2018-04-02 18:35:21 +00:00
Demangle [demangler] Fix a bug in r328464 found by oss-fuzz. 2018-03-26 15:34:36 +00:00
ExecutionEngine [ORC] Fix ORC on platforms without indirection support. 2018-03-28 03:41:45 +00:00
FuzzMutate [llvm-opt-fuzzer] Add irce to the fuzzing options 2018-03-20 11:32:13 +00:00
Fuzzer [libFuzzer] Delete llvm/lib/Fuzzer 2017-10-16 20:48:19 +00:00
IR Fix header mismatch in DIBuilder Type APIs 2018-04-02 19:11:44 +00:00
IRReader LLParser: add an argument for overriding data layout and do not check alloca addr space 2018-01-30 22:32:39 +00:00
LTO Prevent data races in concurrent ThinLTO processes. 2018-03-30 21:35:42 +00:00
LineEditor
…
Linker [ThinLTO] Recommit of import global variables 2018-03-12 10:30:50 +00:00
MC Reapply "[DWARFv5] Emit file 0 to the line table." 2018-03-29 17:16:41 +00:00
Object [llvm-ar] Support multiple dashed options 2018-03-28 17:21:14 +00:00
ObjectYAML Reland "[DebugInfo] Support DWARF expressions in eh_frame" 2018-03-08 00:46:53 +00:00
Option [NFC] Replace iterators in PrintHelp with range-based for 2018-03-12 18:31:07 +00:00
Passes Fix Layering, move instrumentation transform headers into Instrumentation subdirectory 2018-03-23 22:11:06 +00:00
ProfileData Revert "Revert "[InstrProf] Support for external functions in text format."" 2018-03-22 21:26:52 +00:00
Support Remove HAVE_LIBPSAPI, HAVE_SHELL32. 2018-04-02 17:32:48 +00:00
TableGen TableGen: Remove redundant loop in ListInit::resolveReferences 2018-03-21 17:13:10 +00:00
Target [AMDGPU][MC][GFX9] Added instructions v_cvt_norm_*16_f16, v_sat_pk_u8_i16 2018-04-02 17:09:20 +00:00
Testing Force #define GTEST_LANG_CXX11. 2017-10-27 21:12:28 +00:00
ToolDrivers [COFF] Keep the underscore on exported decorated stdcall functions in MSVC mode 2018-01-20 11:44:32 +00:00
Transforms [InstCombine] add folds for icmp + sub (PR36969) 2018-04-02 20:37:40 +00:00
WindowsManifest Fix bug 34608 by moving private header out of public header. 2017-09-14 23:01:13 +00:00
XRay [XRay] clarify error messages when parsing broken traces 2018-01-30 13:41:34 +00:00
CMakeLists.txt
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LLVMBuild.txt
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