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 19 using namespace llvm; 20 21 #define DEBUG_TYPE "hexagontti" 22 23 TargetTransformInfo::PopcntSupportKind 24 HexagonTTIImpl::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. 31 void HexagonTTIImpl::getUnrollingPreferences(Loop *L, 32 TTI::UnrollingPreferences &UP) { 33 UP.Runtime = UP.Partial = true; 34 } 35 36 unsigned HexagonTTIImpl::getNumberOfRegisters(bool vector) const { 37 return vector ? 0 : 32; 38 } 39
