[TargetTransformInfo, API] Add a list of operands to TTI::getUserCost

The changes are a result of discussion of https://reviews.llvm.org/D33685.
It solves the following problem:

1. We can inform getGEPCost about simplified indices to help it with
   calculating the cost. But getGEPCost does not take into account the
   context which GEPs are used in.
2. We have getUserCost which can take the context into account but we cannot
   inform about simplified indices.

With the changes getUserCost will have access to additional information
as getGEPCost has.

The one parameter getUserCost is also provided.

Differential Revision: https://reviews.llvm.org/D34057

llvm-svn: 306674

2 files changed, 5 insertions, 4 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.cpp b/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.cpp
index d3848104d2b..4135d0cec70 100644
--- a/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.cpp
@@ -46,8 +46,9 @@ unsigned HexagonTTIImpl::getCacheLineSize() const {
   return getST()->getL1CacheLineSize();
 }
 
-int HexagonTTIImpl::getUserCost(const User *U) {
-  auto isCastFoldedIntoLoad = [] (const CastInst *CI) -> bool {
+int HexagonTTIImpl::getUserCost(const User *U,
+                                ArrayRef<const Value *> Operands) {
+  auto isCastFoldedIntoLoad = [](const CastInst *CI) -> bool {
     if (!CI->isIntegerCast())
       return false;
     const LoadInst *LI = dyn_cast<const LoadInst>(CI->getOperand(0));
@@ -67,5 +68,5 @@ int HexagonTTIImpl::getUserCost(const User *U) {
   if (const CastInst *CI = dyn_cast<const CastInst>(U))
     if (isCastFoldedIntoLoad(CI))
       return TargetTransformInfo::TCC_Free;
-  return BaseT::getUserCost(U);
+  return BaseT::getUserCost(U, Operands);
 }
diff --git a/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h b/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h
index 08faa2acd90..f08a2731057 100644
--- a/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h
+++ b/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h
@@ -62,7 +62,7 @@ public:
 
   /// @}
 
-  int getUserCost(const User *U);
+  int getUserCost(const User *U, ArrayRef<const Value *> Operands);
 };
 
 } // end namespace llvm