1//===-- HexagonTargetTransformInfo.cpp - Hexagon specific TTI pass --------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8/// \file
9/// This file implements a TargetTransformInfo analysis pass specific to the
10/// Hexagon target machine. It uses the target's detailed information to provide
11/// more precise answers to certain TTI queries, while letting the target
12/// independent and default TTI implementations handle the rest.
13///
14//===----------------------------------------------------------------------===//
15
16#include "HexagonTargetTransformInfo.h"
17#include "llvm/Support/Debug.h"
18
19using namespace llvm;
20
21#define DEBUG_TYPE "hexagontti"
22
23TargetTransformInfo::PopcntSupportKind
24HexagonTTIImpl::getPopcntSupport(unsigned IntTyWidthInBit) const {
25  // Return Fast Hardware support as every input  < 64 bits will be promoted
26  // to 64 bits.
27  return TargetTransformInfo::PSK_FastHardware;
28}
29
30// The Hexagon target can unroll loops with run-time trip counts.
31void HexagonTTIImpl::getUnrollingPreferences(Loop *L,
32                                             TTI::UnrollingPreferences &UP) {
33  UP.Runtime = UP.Partial = true;
34}
35
36unsigned HexagonTTIImpl::getNumberOfRegisters(bool vector) const {
37  return vector ? 0 : 32;
38}
39