Benjamin Kramer 66821d9020 InstCombine: Turn (zext A) == (B & (1<<X)-1) into A == (trunc B), narrowing the compare. ... This saves a cast, and zext is more expensive on platforms with subreg support than trunc is. This occurs in the BSD implementation of memchr(3), see PR12750. On the synthetic benchmark from that bug stupid_memchr and bsd_memchr have the same performance now when not inlining either function. stupid_memchr: 323.0us bsd_memchr: 321.0us memchr: 479.0us where memchr is the llvm-gcc compiled bsd_memchr from osx lion's libc. When inlining is enabled bsd_memchr still regresses down to llvm-gcc memchr time, I haven't fully understood the issue yet, something is grossly mangling the loop after inlining. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158297 91177308-0d34-0410-b5e6-96231b3b80d8		2012-06-10 20:35:00 +00:00
..
Analysis	SCEV: Handle a corner case reducing AddRecExpr * AddRecExpr	2012-05-30 03:35:20 +00:00
Archive
Assembler	Add half support to LLVM (for OpenCL)	2012-05-24 15:59:06 +00:00
Bindings/Ocaml
Bitcode	Add AutoUpgrade support for the SSE4 ptest intrinsics.	2012-06-10 18:42:51 +00:00
BugPoint
CodeGen	Enable ILP scheduling for all nodes by default on PPC.	2012-06-10 19:32:29 +00:00
DebugInfo	Add support for enum forward declarations.	2012-06-01 00:22:32 +00:00
ExecutionEngine	Temporarily disabled the MCJIT tests for Darwin, because the RuntimeDyldMachO has a problems with relocations for 32bit x86.	2012-05-18 00:30:58 +00:00
Feature	rdar://11542750 - llvm.trap should be marked no return.	2012-05-27 23:20:41 +00:00
Instrumentation	[asan] instrument cmpxchg and atomicrmw	2012-05-30 09:04:06 +00:00
Integer	remove two (useless) tests that use incorrect intrinsic prototypes, detected by the new intrinsic verifier.	2012-05-27 19:31:00 +00:00
Linker
MC	Correct decoder for T1 conditional B encoding	2012-06-06 09:12:53 +00:00
Object
Other	Teach the 'opt' tool about '-Os' and '-Oz', corresponding to the Clang	2012-05-16 08:32:49 +00:00
Scripts
TableGen	Add support for range expressions in TableGen foreach loops.	2012-05-24 22:17:39 +00:00
Transforms	InstCombine: Turn (zext A) == (B & (1<<X)-1) into A == (trunc B), narrowing the compare.	2012-06-10 20:35:00 +00:00
Unit
Verifier	Use dominates(Instruction, Use) in the verifier.	2012-06-01 21:56:26 +00:00
YAMLParser
CMakeLists.txt	- Added ExecutionEngine/MCJIT tests	2012-05-17 21:07:47 +00:00
lit.cfg
lit.site.cfg.in	- Added ExecutionEngine/MCJIT tests	2012-05-17 21:07:47 +00:00
Makefile	- Added ExecutionEngine/MCJIT tests	2012-05-17 21:07:47 +00:00
Makefile.tests
site.exp.in
TestRunner.sh