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Move getStrideFromPointer and friends from LoopVectorize to VectorUtils

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The following functions are moved from the LoopVectorizer to VectorUtils:

  - getGEPInductionOperand
  - stripGetElementPtr
  - getUniqueCastUse
  - getStrideFromPointer

These used to be static functions in LoopVectorize, but will also be used by
the upcoming loop versioning LICM transformation.

Patch by Ashutosh Nema!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241980 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel
2015-07-11 10:52:42 +00:00
parent 6690dbffe0
commit 4e947d8111
3 changed files with 169 additions and 137 deletions
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23
include/llvm/Analysis/VectorUtils.h
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@@ -20,6 +20,12 @@
namespace llvm {
class GetElementPtrInst;
class Loop;
class ScalarEvolution;
class Type;
class Value;
/// \brief Identify if the intrinsic is trivially vectorizable.
/// This method returns true if the intrinsic's argument types are all
/// scalars for the scalar form of the intrinsic and all vectors for
@@ -51,6 +57,23 @@ Intrinsic::ID checkBinaryFloatSignature(const CallInst &I,
/// its intrinsic ID, in case it does not found it return not_intrinsic.
Intrinsic::ID getIntrinsicIDForCall(CallInst *CI, const TargetLibraryInfo *TLI);
/// \brief Find the operand of the GEP that should be checked for consecutive
/// stores. This ignores trailing indices that have no effect on the final
/// pointer.
unsigned getGEPInductionOperand(const GetElementPtrInst *Gep);
/// \brief If the argument is a GEP, then returns the operand identified by
/// getGEPInductionOperand. However, if there is some other non-loop-invariant
/// operand, it returns that instead.
Value *stripGetElementPtr(Value *Ptr, ScalarEvolution *SE, Loop *Lp);
/// \brief If a value has only one user that is a CastInst, return it.
Value *getUniqueCastUse(Value *Ptr, Loop *Lp, Type *Ty);
/// \brief Get the stride of a pointer access in a loop. Looks for symbolic
/// strides "a[i*stride]". Returns the symbolic stride, or null otherwise.
Value *getStrideFromPointer(Value *Ptr, ScalarEvolution *SE, Loop *Lp);
} // llvm namespace
#endif