[SystemZ] implement hasDivRemOp()

SystemZ can do division and remainder in a single instruction for scalar
integer types, which are now reflected by returning true in this hook for
those cases.

Review: Ulrich Weigand
llvm-svn: 317477

2 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp
index a4d9421e08a..6d50369e587 100644
--- a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp
@@ -323,6 +323,11 @@ unsigned SystemZTTIImpl::getRegisterBitWidth(bool Vector) const {
   return 0;
 }
 
+bool SystemZTTIImpl::hasDivRemOp(Type *DataType, bool IsSigned) {
+  EVT VT = TLI->getValueType(DL, DataType);
+  return (VT.isScalarInteger() && TLI->isTypeLegal(VT));
+}
+
 int SystemZTTIImpl::getArithmeticInstrCost(
     unsigned Opcode, Type *Ty,  
     TTI::OperandValueKind Op1Info, TTI::OperandValueKind Op2Info,
diff --git a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
index 28821a2ca11..4b11a6f0a83 100644
--- a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
+++ b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
@@ -62,6 +62,7 @@ public:
   unsigned getPrefetchDistance() { return 2000; }
   unsigned getMinPrefetchStride() { return 2048; }
 
+  bool hasDivRemOp(Type *DataType, bool IsSigned);
   bool prefersVectorizedAddressing() { return false; }
   bool LSRWithInstrQueries() { return true; }
   bool supportsEfficientVectorElementLoadStore() { return true; }