Chandler Carruth 5b854f1ea5 Re-instate r187323 which fast-tracks promotable allocas as soon as the ... SROA-based analysis has enough information. This should work now that both mem2reg *and* the SSAUpdater-based AllocaPromoter have been updated to be able to promote the types of allocas that the SROA analysis detects. I've included tests for the AllocaPromoter that were only possible to write once we fast-tracked promotable allocas without rewriting them. This includes a test both for r187347 and r188145. Original commit log for r187323: """ Now that mem2reg understands how to cope with a slightly wider set of uses of an alloca, we can pre-compute promotability while analyzing an alloca for splitting in SROA. That lets us short-circuit the common case of a bunch of trivially promotable allocas. This cuts 20% to 30% off the run time of SROA for typical frontend-generated IR sequneces I'm seeing. It gets the new SROA to within 20% of ScalarRepl for such code. My current benchmark for these numbers is PR15412, but it fits the general pattern of IR emitted by Clang so it should be widely applicable. """ git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188146 91177308-0d34-0410-b5e6-96231b3b80d8		2013-08-11 02:17:11 +00:00
..
ADCE.cpp
BasicBlockPlacement.cpp
CMakeLists.txt	Factor FlattenCFG out from SimplifyCFG	2013-08-06 02:43:45 +00:00
CodeGenPrepare.cpp	Remove trailing whitespace	2013-07-15 17:55:02 +00:00
ConstantProp.cpp
CorrelatedValuePropagation.cpp
DCE.cpp
DeadStoreElimination.cpp
EarlyCSE.cpp
FlattenCFGPass.cpp	Factor FlattenCFG out from SimplifyCFG	2013-08-06 02:43:45 +00:00
GlobalMerge.cpp	Change tabs to spaces.	2013-07-22 21:11:30 +00:00
GVN.cpp	Reimplement isPotentiallyReachable to make nocapture deduction much stronger.	2013-07-27 01:24:00 +00:00
IndVarSimplify.cpp
JumpThreading.cpp	JumpThreading: Turn a select instruction into branching if it allows to thread one half of the select.	2013-08-07 10:29:38 +00:00
LICM.cpp
LLVMBuild.txt
LoopDeletion.cpp	Use SmallVectorImpl& instead of SmallVector to avoid repeating small vector size.	2013-07-14 04:42:23 +00:00
LoopIdiomRecognize.cpp	Fix spelling and grammar	2013-07-22 18:59:58 +00:00
LoopInstSimplify.cpp
LoopRotation.cpp
LoopStrengthReduce.cpp
LoopUnrollPass.cpp
LoopUnswitch.cpp	Adjust file to the coding standard.	2013-08-06 17:03:42 +00:00
LowerAtomic.cpp
Makefile
MemCpyOptimizer.cpp
Reassociate.cpp	Use switch instead of if. No functionality change.	2013-07-22 23:38:16 +00:00
Reg2Mem.cpp
Scalar.cpp	Factor FlattenCFG out from SimplifyCFG	2013-08-06 02:43:45 +00:00
ScalarReplAggregates.cpp	Thread DataLayout through the callers and into mem2reg. This will be	2013-07-28 06:43:11 +00:00
SCCP.cpp	Use SmallVectorImpl& instead of SmallVector to avoid repeating small vector size.	2013-07-14 04:42:23 +00:00
SimplifyCFGPass.cpp	Revert r188119 "Kill some duplicated code for removing unreachable BBs."	2013-08-10 20:16:06 +00:00
Sink.cpp
SROA.cpp	Re-instate r187323 which fast-tracks promotable allocas as soon as the	2013-08-11 02:17:11 +00:00
StructurizeCFG.cpp	Add 'const' qualifiers to static const char* variables.	2013-07-16 01:17:10 +00:00
TailRecursionElimination.cpp	TRE: Move class into anonymous namespace.	2013-07-24 16:12:08 +00:00