Hal Finkel 21d1f99033 Add an AlignmentFromAssumptions Pass ... This adds a ScalarEvolution-powered transformation that updates load, store and memory intrinsic pointer alignments based on invariant((a+q) & b == 0) expressions. Many of the simple cases we can get with ValueTracking, but we still need something like this for the more complicated cases (such as those with an offset) that require some algebra. Note that gcc's __builtin_assume_aligned's optional third argument provides exactly for this kind of 'misalignment' offset for which this kind of logic is necessary. The primary motivation is to fixup alignments for vector loads/stores after vectorization (and unrolling). This pass is added to the optimization pipeline just after the SLP vectorizer runs (which, admittedly, does not preserve SE, although I imagine it could). Regardless, I actually don't think that the preservation matters too much in this case: SE computes lazily, and this pass won't issue any SE queries unless there are any assume intrinsics, so there should be no real additional cost in the common case (SLP does preserve DT and LoopInfo). llvm-svn: 217344		2014-09-07 20:05:11 +00:00
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Hello	[CMake] Add LLVM_LINK_COMPONENTS to loadable modules, LLVMHello and BugpointPasses, on Win32.	2014-07-13 13:36:48 +00:00
InstCombine	Add additional patterns for @llvm.assume in ValueTracking	2014-09-07 19:21:07 +00:00
Instrumentation	[asan] fix debug info produced for asan-coverage=2	2014-09-03 23:24:18 +00:00
IPO	Add an AlignmentFromAssumptions Pass	2014-09-07 20:05:11 +00:00
ObjCARC	Simplify creation of a bunch of ArrayRefs by using None, makeArrayRef or just letting them be implicitly created.	2014-08-27 05:25:25 +00:00
Scalar	Add an AlignmentFromAssumptions Pass	2014-09-07 20:05:11 +00:00
Utils	Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.)	2014-09-07 18:57:58 +00:00
Vectorize	Preserve IR flags (nsw, nuw, exact, fast-math) in SLP vectorizer (PR20802).	2014-09-03 17:40:30 +00:00
CMakeLists.txt	Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation for refactoring the ARC Optimizer.	2013-01-28 01:35:51 +00:00
LLVMBuild.txt	Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation for refactoring the ARC Optimizer.	2013-01-28 01:35:51 +00:00
Makefile	Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation for refactoring the ARC Optimizer.	2013-01-28 01:35:51 +00:00