Chris Lattner b3f0673d52 Teach valuetracking that byval arguments with a specified alignment are ... aligned. Teach memcpyopt to not give up all hope when confonted with an underaligned memcpy feeding an overaligned byval. If the *source* of the memcpy can be determined to be adequeately aligned, or if it can be forced to be, we can eliminate the memcpy. This addresses PR9794. We now compile the example into: define i32 @f(%struct.p* nocapture byval align 8 %q) nounwind ssp { entry: %call = call i32 @g(%struct.p* byval align 8 %q) nounwind ret i32 %call } in both x86-64 and x86-32 mode. We still don't get a tailcall though, because tailcalls apparently can't handle byval. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131884 91177308-0d34-0410-b5e6-96231b3b80d8		2011-05-23 00:03:39 +00:00
..
ADCE.cpp	Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which	2010-10-19 17:21:58 +00:00
BasicBlockPlacement.cpp	Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which	2010-10-19 17:21:58 +00:00
CMakeLists.txt	Unbreak CMake build.	2011-02-28 23:56:33 +00:00
CodeGenPrepare.cpp	Add a parameter to ConstantFoldTerminator() that callers can use to ask it to also clean up the condition of any conditional terminator it folds to be unconditional, if that turns the condition into dead code. This just means it calls RecursivelyDeleteTriviallyDeadInstructions() in strategic spots. It defaults to the old behavior.	2011-05-22 16:24:18 +00:00
ConstantProp.cpp	Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which	2010-10-19 17:21:58 +00:00
CorrelatedValuePropagation.cpp	Don't include Operator.h from InstrTypes.h.	2011-04-11 09:35:34 +00:00
DCE.cpp	Remove unused STL header includes.	2011-04-23 19:53:52 +00:00
DeadStoreElimination.cpp	Fix a ton of comment typos found by codespell. Patch by	2011-04-15 05:18:47 +00:00
EarlyCSE.cpp	Duncan deftly points out that readnone functions aren't	2011-01-03 23:38:13 +00:00
GVN.cpp	fix PR9841 by having GVN not process dead loads. This was	2011-05-22 07:03:34 +00:00
IndVarSimplify.cpp	indvars: Prototyping Sign/ZeroExtend elimination without canonical IVs.	2011-05-20 18:25:42 +00:00
JumpThreading.cpp	Add a parameter to ConstantFoldTerminator() that callers can use to ask it to also clean up the condition of any conditional terminator it folds to be unconditional, if that turns the condition into dead code. This just means it calls RecursivelyDeleteTriviallyDeadInstructions() in strategic spots. It defaults to the old behavior.	2011-05-22 16:24:18 +00:00
LICM.cpp	PR9634: Don't unconditionally tell the AliasSetTracker that the PreheaderLoad	2011-04-07 01:35:06 +00:00
LoopDeletion.cpp	Make LoopDeletion work on loops with multiple edges, as long as the incoming	2011-02-22 22:25:39 +00:00
LoopIdiomRecognize.cpp	Fix PR9815: I was trying to get out of "generating code and then	2011-05-22 17:39:56 +00:00
LoopInstSimplify.cpp	LoopInstSimplify preserves ScalarEvolution.	2011-02-11 06:08:25 +00:00
LoopRotation.cpp	Preserve line number information.	2011-04-29 20:38:55 +00:00
LoopStrengthReduce.cpp	indvars: Prototyping Sign/ZeroExtend elimination without canonical IVs.	2011-05-20 18:25:42 +00:00
LoopUnrollPass.cpp	fix a couple -Wsign-compare warnings.	2011-04-14 02:27:25 +00:00
LoopUnswitch.cpp	Make LoopUnswitch preserve ScalarEvolution by just forgetting everything about	2011-02-11 06:08:28 +00:00
LowerAtomic.cpp	Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which	2010-10-19 17:21:58 +00:00
Makefile
MemCpyOptimizer.cpp	Teach valuetracking that byval arguments with a specified alignment are	2011-05-23 00:03:39 +00:00
Reassociate.cpp	Preserve line number information.	2011-04-28 22:48:14 +00:00
Reg2Mem.cpp	Fix a ton of comment typos found by codespell. Patch by	2011-04-15 05:18:47 +00:00
Scalar.cpp	Add the alias analysis to the C api.	2011-04-13 15:44:58 +00:00
ScalarReplAggregates.cpp	Fix PR9820: a read-only call differs from a load in that a load doesn't	2011-05-06 10:30:37 +00:00
SCCP.cpp	PR7952: Make isa<> use the same logic as cast<>, so that they both work	2011-05-21 19:13:10 +00:00
SimplifyCFGPass.cpp	Add a parameter to ConstantFoldTerminator() that callers can use to ask it to also clean up the condition of any conditional terminator it folds to be unconditional, if that turns the condition into dead code. This just means it calls RecursivelyDeleteTriviallyDeadInstructions() in strategic spots. It defaults to the old behavior.	2011-05-22 16:24:18 +00:00
SimplifyLibCalls.cpp	Preserve line number information while simplifying libcalls.	2011-03-09 21:27:52 +00:00
Sink.cpp	Add helper functions for computing the Location of load, store,	2010-11-11 21:50:19 +00:00
TailDuplication.cpp	Replace calls to ConstantFoldInstruction with calls to SimplifyInstruction	2010-11-23 20:26:33 +00:00
TailRecursionElimination.cpp	Don't do tail calls in a function that call setjmp. The stack might be	2011-05-16 03:05:33 +00:00