Quentin Colombet 685b0d9315 Lower unsigned vsetcc to psubus in certain cases ... The current approach to lower a vsetult is to flip the sign bit of the operands, swap the operands and then use a (signed) pcmpgt. psubus (unsigned saturating subtract) can be used to emulate a vsetult more efficiently: + case ISD::SETULT: { + // If the comparison is against a constant we can turn this into a + // setule. With psubus, setule does not require a swap. This is + // beneficial because the constant in the register is no longer + // destructed as the destination so it can be hoisted out of a loop. I also enable lowering via psubus in a few other cases where it's clearly beneficial: setule and setuge if minu/maxu cannot be used. rdar://problem/14338765 Patch by Adam Nemet <anemet@apple.com>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202301 91177308-0d34-0410-b5e6-96231b3b80d8		2014-02-26 21:39:12 +00:00
..
Analysis	Constify the Optnone checks in IR passes.	2014-02-26 01:23:26 +00:00
AsmParser	[ms-cxxabi] Add a new calling convention that swaps 'this' and 'sret'	2014-01-31 17:41:22 +00:00
Bitcode	Store a DataLayout in Module.	2014-02-25 20:01:08 +00:00
CodeGen	Fix the aggressive anti-dep breaker's subregister definition handling	2014-02-26 20:20:30 +00:00
DebugInfo	llvm-dwarfdump: Support for debug_line.dwo section for file names for type units under fission.	2014-02-24 23:58:54 +00:00
ExecutionEngine	Use DataLayout from the module when easily available.	2014-02-25 23:25:17 +00:00
IR	Fix typo. Thanks to Roman Divacky for noticing it.	2014-02-26 17:05:38 +00:00
IRReader	Make parseBitcodeFile return an ErrorOr<Module *>.	2014-01-15 01:08:23 +00:00
LineEditor	[CMake] Use LINK_LIBS instead of target_link_libraries().	2014-02-26 06:41:29 +00:00
Linker	Compare DataLayout by Value, not by pointer.	2014-02-26 17:02:08 +00:00
LTO	Use DataLayout from the module when easily available.	2014-02-25 23:25:17 +00:00
MC	Reuse constants for COFF string table entry offsets	2014-02-25 09:50:40 +00:00
Object	Relax COFF string table check	2014-02-26 19:51:44 +00:00
Option	Avoid buffer copies when a Twine already is a StringRef.	2013-12-03 18:18:28 +00:00
Support	[CMake] BUILD_SHARED_LIBS: Fixup for r202261: Give PULIC to system_libs in LLVMSupport.	2014-02-26 12:18:55 +00:00
TableGen	Replace the F_Binary flag with a F_Text one.	2014-02-24 18:20:12 +00:00
Target	Lower unsigned vsetcc to psubus in certain cases	2014-02-26 21:39:12 +00:00
Transforms	GlobalOpt: Apply fastcc to internal x86_thiscallcc functions	2014-02-26 19:57:30 +00:00
CMakeLists.txt	Introduce line editor library.	2014-01-31 23:46:14 +00:00
LLVMBuild.txt	Introduce line editor library.	2014-01-31 23:46:14 +00:00
Makefile	Introduce line editor library.	2014-01-31 23:46:14 +00:00