Richard Sandiford 8c20158fb0 [SystemZ] Use SRST to optimize memchr ... SystemZTargetLowering::emitStringWrapper() previously loaded the character into R0 before the loop and made R0 live on entry. I'd forgotten that allocatable registers weren't allowed to be live across blocks at this stage, and it confused LiveVariables enough to cause a miscompilation of f3 in memchr-02.ll. This patch instead loads R0 in the loop and leaves LICM to hoist it after RA. This is actually what I'd tried originally, but I went for the manual optimisation after noticing that R0 often wasn't being hoisted. This bug forced me to go back and look at why, now fixed as r188774. We should also try to optimize null checks so that they test the CC result of the SRST directly. The select between null and the SRST GPR result could then usually be deleted as dead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188779 91177308-0d34-0410-b5e6-96231b3b80d8		2013-08-20 09:38:48 +00:00
..
ADT	Make sure that pop_back_val() result is used.	2013-08-19 22:12:00 +00:00
Analysis	Fix an oversight in isPotentiallyReachable where we wouldn't do any CFG-walking	2013-08-13 00:03:47 +00:00
Assembly
Bitcode	Make .bc en/decoding of AttrKind stable	2013-07-26 04:16:55 +00:00
CodeGen	[stackprotector] Refactor out the end of isInTailCallPosition into the function returnTypeIsEligibleForTailCall.	2013-08-20 08:36:50 +00:00
Config	Remove all checking for the various terminfo headers (term.h and	2013-08-12 10:40:11 +00:00
DebugInfo	Add LLVM-style RTTI to DIContext/DWARFContext classes	2013-08-06 10:32:39 +00:00
ExecutionEngine
IR	[mips][msa] Added insve	2013-08-20 09:22:54 +00:00
IRReader
MC	Support C99 hexadecimal floating-point literals in assembly	2013-08-14 14:23:31 +00:00
Object	[Object/ELF] sh_type is not a bitfield. Fixes RuntimeDyld test failure on ARM.	2013-08-12 22:59:14 +00:00
Option	Options: Add new option kind that consumes remaining arguments	2013-08-13 21:09:50 +00:00
Support	Add definition of __warn_unused_result__ attribute. It will be used in the	2013-08-19 19:02:33 +00:00
TableGen	[typo] An LLVM.	2013-08-16 23:30:19 +00:00
Target	[SystemZ] Use SRST to optimize memchr	2013-08-20 09:38:48 +00:00
Transforms	Fix assert with GEP ptr vector indexing structs	2013-08-19 21:43:16 +00:00
AutoUpgrade.h	Remove trailing whitespace, fix file path in comment	2013-07-20 17:46:00 +00:00
CMakeLists.txt
DebugInfo.h	DebugInfo: Allow the addition of other (such as static data) members to a record type after construction	2013-08-16 20:42:14 +00:00
DIBuilder.h	DebugInfo: Allow the addition of other (such as static data) members to a record type after construction	2013-08-16 20:42:14 +00:00
GVMaterializer.h
InitializePasses.h	DataFlowSanitizer; LLVM changes.	2013-08-07 22:47:18 +00:00
InstVisitor.h
LinkAllIR.h
LinkAllPasses.h	Remove the simplify-libcalls pass (finally)	2013-06-20 19:48:07 +00:00
Linker.h
Pass.h
PassAnalysisSupport.h
PassManager.h
PassManagers.h	Use a DenseMap instead of a std::map for AnalysisID -> Pass* maps. This reduces the pass-manager overhead from FPPassManager::runOnFunction() by about 10%.	2013-02-26 01:31:59 +00:00
PassRegistry.h
PassSupport.h