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 "bcc/Renderscript/RSTransforms.h"
18#include "bcc/Support/Log.h"
19
20#include <cstdlib>
21
22#include <llvm/IR/Instructions.h>
23#include <llvm/IR/Metadata.h>
24#include <llvm/IR/Module.h>
25#include <llvm/IR/Function.h>
26#include <llvm/Pass.h>
27
28namespace { // anonymous namespace
29
30// Create a Module pass that screens all the global functions in the module and
31// check if any non-threadable function is callable.  If so, we mark the
32// Module as non-threadable by adding a metadata flag '#rs_is_threadable'
33
34class RSIsThreadablePass : public llvm::ModulePass {
35private:
36  static char ID;
37
38  std::vector<std::string> nonThreadableFns = {
39    "_Z22rsgBindProgramFragment19rs_program_fragment",
40    "_Z19rsgBindProgramStore16rs_program_store",
41    "_Z20rsgBindProgramVertex17rs_program_vertex",
42    "_Z20rsgBindProgramRaster17rs_program_raster",
43    "_Z14rsgBindSampler19rs_program_fragmentj10rs_sampler",
44    "_Z14rsgBindTexture19rs_program_fragmentj13rs_allocation",
45    "_Z15rsgBindConstant19rs_program_fragmentj13rs_allocation",
46    "_Z15rsgBindConstant17rs_program_vertexj13rs_allocation",
47    "_Z36rsgProgramVertexLoadProjectionMatrixPK12rs_matrix4x4",
48    "_Z31rsgProgramVertexLoadModelMatrixPK12rs_matrix4x4",
49    "_Z33rsgProgramVertexLoadTextureMatrixPK12rs_matrix4x4",
50    "_Z35rsgProgramVertexGetProjectionMatrixP12rs_matrix4x4",
51    "_Z31rsgProgramFragmentConstantColor19rs_program_fragmentffff",
52    "_Z11rsgGetWidthv",
53    "_Z12rsgGetHeightv",
54    "_Z11rsgDrawRectfffff",
55    "_Z11rsgDrawQuadffffffffffff",
56    "_Z20rsgDrawQuadTexCoordsffffffffffffffffffff",
57    "_Z24rsgDrawSpriteScreenspacefffff",
58    "_Z11rsgDrawMesh7rs_mesh",
59    "_Z11rsgDrawMesh7rs_meshj",
60    "_Z11rsgDrawMesh7rs_meshjjj",
61    "_Z25rsgMeshComputeBoundingBox7rs_meshPfS0_S0_S0_S0_S0_",
62    "_Z11rsgDrawPath7rs_path",
63    "_Z13rsgClearColorffff",
64    "_Z13rsgClearDepthf",
65    "_Z11rsgDrawTextPKcii",
66    "_Z11rsgDrawText13rs_allocationii",
67    "_Z14rsgMeasureTextPKcPiS1_S1_S1_",
68    "_Z14rsgMeasureText13rs_allocationPiS0_S0_S0_",
69    "_Z11rsgBindFont7rs_font",
70    "_Z12rsgFontColorffff",
71    "_Z18rsgBindColorTarget13rs_allocationj",
72    "_Z18rsgBindDepthTarget13rs_allocation",
73    "_Z19rsgClearColorTargetj",
74    "_Z19rsgClearDepthTargetv",
75    "_Z24rsgClearAllRenderTargetsv",
76    "_Z7rsGetDtv",
77    "_Z5colorffff",
78    "_Z9rsgFinishv",
79  };
80
81  bool isPresent(std::vector<std::string> &list, std::string name) {
82    auto lower = std::lower_bound(list.begin(),
83                                  list.end(),
84                                  name);
85
86    if (lower != list.end() && name.compare(*lower) == 0)
87      return true;
88    return false;
89  }
90
91public:
92  RSIsThreadablePass()
93    : ModulePass (ID) {
94      std::sort(nonThreadableFns.begin(), nonThreadableFns.end());
95  }
96
97  virtual void getAnalysisUsage(llvm::AnalysisUsage &AU) const override {
98    AU.setPreservesAll();
99  }
100
101  bool runOnModule(llvm::Module &M) override {
102    bool threadable = true;
103
104    auto &FunctionList(M.getFunctionList());
105    for (auto &F: FunctionList) {
106      if (isPresent(nonThreadableFns, F.getName().str())) {
107        threadable = false;
108        break;
109      }
110    }
111
112    llvm::LLVMContext &context = M.getContext();
113    llvm::MDString *val =
114      llvm::MDString::get(context, (threadable) ? "yes" : "no");
115    llvm::NamedMDNode *node =
116        M.getOrInsertNamedMetadata("#rs_is_threadable");
117    node->addOperand(llvm::MDNode::get(context, val));
118
119    return false;
120  }
121
122};
123
124}
125
126char RSIsThreadablePass::ID = 0;
127
128namespace bcc {
129
130llvm::ModulePass *
131createRSIsThreadablePass () {
132  return new RSIsThreadablePass();
133}
134
135}
136