Matt Wala | c0c5dd8 | 2015-07-23 17:29:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015, The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "slang_rs_export_reduce.h" |
| 18 | |
| 19 | #include <algorithm> |
| 20 | #include <string> |
| 21 | |
| 22 | #include "clang/AST/Attr.h" |
Matt Wala | f59fffe | 2015-07-30 13:10:17 -0700 | [diff] [blame] | 23 | #include "clang/AST/ASTContext.h" |
Matt Wala | c0c5dd8 | 2015-07-23 17:29:37 -0700 | [diff] [blame] | 24 | |
| 25 | #include "slang_assert.h" |
| 26 | #include "slang_rs_context.h" |
| 27 | #include "slang_rs_export_type.h" |
| 28 | #include "slang_version.h" |
| 29 | |
| 30 | |
| 31 | namespace { |
| 32 | |
| 33 | bool haveReduceInTargetAPI(unsigned int TargetAPI) { |
| 34 | return TargetAPI == RS_DEVELOPMENT_API; |
| 35 | } |
| 36 | |
| 37 | } // end anonymous namespace |
| 38 | |
| 39 | |
| 40 | namespace slang { |
| 41 | |
| 42 | // Validate the parameters to a reduce kernel, and set up the |
| 43 | // exportable object if the kernel is valid. |
| 44 | // |
| 45 | // This checks that the passed function declaration of a reduce kernel is |
| 46 | // a function which satisfies all the requirements for a reduce |
| 47 | // kernel. Namely, we check for: |
| 48 | // - correct target API |
| 49 | // - correct parameter count |
| 50 | // - non void return type |
| 51 | // - return type and parameter types match |
| 52 | // - no pointer types in signature. |
| 53 | // |
| 54 | // We try to report useful errors to the user. |
| 55 | // |
| 56 | // On success, this function returns true and sets the fields mIns and |
| 57 | // mType to point to the arguments and to the kernel type. |
| 58 | // |
| 59 | // If an error was detected, this function returns false. |
| 60 | bool RSExportReduce::validateAndConstructParams( |
| 61 | RSContext *Context, const clang::FunctionDecl *FD) { |
| 62 | slangAssert(Context && FD); |
| 63 | bool Valid = true; |
| 64 | |
Matt Wala | f59fffe | 2015-07-30 13:10:17 -0700 | [diff] [blame] | 65 | clang::ASTContext &ASTCtx = FD->getASTContext(); |
| 66 | |
Matt Wala | c0c5dd8 | 2015-07-23 17:29:37 -0700 | [diff] [blame] | 67 | // Validate API version. |
| 68 | if (!haveReduceInTargetAPI(Context->getTargetAPI())) { |
| 69 | Context->ReportError(FD->getLocation(), |
| 70 | "Reduce-style kernel %0() unsupported in SDK level %1") |
| 71 | << FD->getName() << Context->getTargetAPI(); |
| 72 | Valid = false; |
| 73 | } |
| 74 | |
| 75 | // Validate parameter count. |
| 76 | if (FD->getNumParams() != 2) { |
| 77 | Context->ReportError(FD->getLocation(), |
| 78 | "Reduce-style kernel %0() must take 2 parameters " |
| 79 | "(found %1).") |
| 80 | << FD->getName() << FD->getNumParams(); |
| 81 | Valid = false; |
| 82 | } |
| 83 | |
| 84 | // Validate return type. |
| 85 | const clang::QualType ReturnTy = FD->getReturnType().getCanonicalType(); |
| 86 | |
| 87 | if (ReturnTy->isVoidType()) { |
| 88 | Context->ReportError(FD->getLocation(), |
| 89 | "Reduce-style kernel %0() cannot return void") |
| 90 | << FD->getName(); |
| 91 | Valid = false; |
| 92 | } else if (ReturnTy->isPointerType()) { |
| 93 | Context->ReportError(FD->getLocation(), |
| 94 | "Reduce-style kernel %0() cannot return a pointer " |
| 95 | "type: %1") |
| 96 | << FD->getName() << ReturnTy.getAsString(); |
| 97 | Valid = false; |
| 98 | } |
| 99 | |
| 100 | // Validate parameter types. |
| 101 | if (FD->getNumParams() == 0) { |
| 102 | return false; |
| 103 | } |
| 104 | |
| 105 | const clang::ParmVarDecl &FirstParam = *FD->getParamDecl(0); |
| 106 | const clang::QualType FirstParamTy = FirstParam.getType().getCanonicalType(); |
| 107 | |
| 108 | for (auto PVD = FD->param_begin(), PE = FD->param_end(); PVD != PE; ++PVD) { |
| 109 | const clang::ParmVarDecl &Param = **PVD; |
| 110 | const clang::QualType ParamTy = Param.getType().getCanonicalType(); |
| 111 | |
| 112 | // Check that the parameter is not a pointer. |
| 113 | if (ParamTy->isPointerType()) { |
| 114 | Context->ReportError(Param.getLocation(), |
| 115 | "Reduce-style kernel %0() cannot have " |
| 116 | "parameter '%1' of pointer type: '%2'") |
| 117 | << FD->getName() << Param.getName() << ParamTy.getAsString(); |
| 118 | Valid = false; |
| 119 | } |
| 120 | |
| 121 | // Check for type mismatch between this parameter and the return type. |
Matt Wala | f59fffe | 2015-07-30 13:10:17 -0700 | [diff] [blame] | 122 | if (!ASTCtx.hasSameUnqualifiedType(ReturnTy, ParamTy)) { |
Matt Wala | c0c5dd8 | 2015-07-23 17:29:37 -0700 | [diff] [blame] | 123 | Context->ReportError(FD->getLocation(), |
| 124 | "Reduce-style kernel %0() return type '%1' is not " |
| 125 | "the same type as parameter '%2' (type '%3')") |
| 126 | << FD->getName() << ReturnTy.getAsString() << Param.getName() |
| 127 | << ParamTy.getAsString(); |
| 128 | Valid = false; |
| 129 | } |
| 130 | |
| 131 | // Check for type mismatch between parameters. It is sufficient to check |
| 132 | // for a mismatch with the type of the first argument. |
| 133 | if (ParamTy != FirstParamTy) { |
| 134 | Context->ReportError(FirstParam.getLocation(), |
| 135 | "In reduce-style kernel %0(): parameter '%1' " |
| 136 | "(type '%2') does not have the same type as " |
| 137 | "parameter '%3' (type '%4')") |
| 138 | << FD->getName() << FirstParam.getName() << FirstParamTy.getAsString() |
| 139 | << Param.getName() << ParamTy.getAsString(); |
| 140 | Valid = false; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | if (Valid) { |
| 145 | // If the validation was successful, then populate the fields of |
| 146 | // the exportable. |
| 147 | if (!(mType = RSExportType::Create(Context, ReturnTy.getTypePtr()))) { |
| 148 | // There was an error exporting the type for the reduce kernel. |
| 149 | return false; |
| 150 | } |
| 151 | |
| 152 | slangAssert(mIns.size() == 2 && FD->param_end() - FD->param_begin() == 2); |
| 153 | std::copy(FD->param_begin(), FD->param_end(), mIns.begin()); |
| 154 | } |
| 155 | |
| 156 | return Valid; |
| 157 | } |
| 158 | |
| 159 | RSExportReduce *RSExportReduce::Create(RSContext *Context, |
| 160 | const clang::FunctionDecl *FD) { |
| 161 | slangAssert(Context && FD); |
| 162 | llvm::StringRef Name = FD->getName(); |
| 163 | |
| 164 | slangAssert(!Name.empty() && "Function must have a name"); |
| 165 | |
| 166 | RSExportReduce *RE = new RSExportReduce(Context, Name); |
| 167 | |
| 168 | if (!RE->validateAndConstructParams(Context, FD)) { |
| 169 | // Don't delete RE here - owned by Context. |
| 170 | return nullptr; |
| 171 | } |
| 172 | |
| 173 | return RE; |
| 174 | } |
| 175 | |
| 176 | bool RSExportReduce::isRSReduceFunc(unsigned int /* targetAPI */, |
| 177 | const clang::FunctionDecl *FD) { |
| 178 | slangAssert(FD); |
| 179 | clang::KernelAttr *KernelAttrOrNull = FD->getAttr<clang::KernelAttr>(); |
| 180 | return KernelAttrOrNull && KernelAttrOrNull->getKernelKind().equals("reduce"); |
| 181 | } |
| 182 | |
| 183 | } // namespace slang |