Arnold Schwaighofer 54d9a3e2df Revert "SimplifyCFG: If convert single conditional stores" ... There is the temptation to make this tranform dependent on target information as it is not going to be beneficial on all (sub)targets. Therefore, we should probably do this in MI Early-Ifconversion. This reverts commit r179957. Original commit message: "SimplifyCFG: If convert single conditional stores This transformation will transform a conditional store with a preceeding uncondtional store to the same location: a[i] = may-alias with a[i] load if (cond) a[i] = Y into an unconditional store. a[i] = X may-alias with a[i] load tmp = cond ? Y : X; a[i] = tmp We assume that on average the cost of a mispredicted branch is going to be higher than the cost of a second store to the same location, and that the secondary benefits of creating a bigger basic block for other optimizations to work on outway the potential case were the branch would be correctly predicted and the cost of the executing the second store would be noticably reflected in performance. hmmer's execution time improves by 30% on an imac12,2 on ref data sets. With this change we are on par with gcc's performance (gcc also performs this transformation). There was a 1.2 % performance improvement on a ARM swift chip. Other tests in the test-suite+external seem to be mostly uninfluenced in my experiments: This optimization was triggered on 41 tests such that the executable was different before/after the patch. Only 1 out of the 40 tests (dealII) was reproducable below 100% (by about .4%). Given that hmmer benefits so much I believe this to be a fair trade off. I am going to watch performance numbers across the builtbots and will revert this if anything unexpected comes up." git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179980 91177308-0d34-0410-b5e6-96231b3b80d8		2013-04-21 13:09:04 +00:00
..
BasicBlockUtils.cpp	Remove trailing spaces.	2013-01-14 23:16:36 +00:00
BreakCriticalEdges.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
BuildLibCalls.cpp	Convert BuildLibCalls.cpp to using the AttributeSet methods instead of AttributeWithIndex.	2013-01-26 00:03:11 +00:00
BypassSlowDivision.cpp	Bypass Slow Divides	2013-03-04 18:13:57 +00:00
CloneFunction.cpp	Change CloneFunctionInto to always clone Argument attributes induvidually,	2013-04-10 10:37:38 +00:00
CloneModule.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
CMakeLists.txt	Sink the AddressingModeMatcher helper class into an anonymous namespace	2013-01-05 02:09:22 +00:00
CmpInstAnalysis.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
CodeExtractor.cpp	Remove #includes from the commonly used LoopInfo.h.	2013-02-09 01:04:28 +00:00
DemoteRegToStack.cpp	[SjLj Prepare] When demoting an invoke instructions to the stack, if the normal	2013-02-05 18:23:10 +00:00
InlineFunction.cpp	Add all clauses when merging the landing pads. Duplicates will be handled later on.	2013-03-22 20:31:05 +00:00
InstructionNamer.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
IntegerDivision.cpp	Enhance integer division emulation support to handle types smaller than 32 bits,	2013-02-26 23:33:20 +00:00
LCSSA.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LLVMBuild.txt	LLVMBuild: Remove trailing newline, which irked me.	2011-12-12 19:48:00 +00:00
Local.cpp	Fix llvm::removeUnreachableBlocks to handle unreachable loops.	2013-03-22 08:43:04 +00:00
LoopSimplify.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LoopUnroll.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LoopUnrollRuntime.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LowerExpectIntrinsic.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LowerInvoke.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LowerSwitch.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
Makefile
Mem2Reg.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
MetaRenamer.cpp	Make sure metarenamer won't rename special stuff (intrinsics and explicitly renamed stuff).	2013-01-23 15:03:08 +00:00
ModuleUtils.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
PromoteMemoryToRegister.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
SimplifyCFG.cpp	Revert "SimplifyCFG: If convert single conditional stores"	2013-04-21 13:09:04 +00:00
SimplifyIndVar.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
SimplifyInstructions.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
SimplifyLibCalls.cpp	Do not optimise fprintf() calls if its return value is used.	2013-04-17 02:01:10 +00:00
SSAUpdater.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
UnifyFunctionExitNodes.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
Utils.cpp	Add a pass that renames everything with metasyntatic names. This works well after using bugpoint to reduce the confusion presented by the original names, which no longer mean what they used to.	2012-09-11 02:46:18 +00:00
ValueMapper.cpp	Linker: correctly link in dbg.declare	2013-01-31 21:19:18 +00:00