1 #if HAVE_LLVM > 0x0390
2 #include "llvm/Bitcode/BitcodeReader.h"
3 #include "llvm/Bitcode/BitcodeWriter.h"
4 #else
5 #include "llvm/Bitcode/ReaderWriter.h"
6 #endif
7
8 #include "llvm/IR/Function.h"
9 #include "llvm/IR/GlobalVariable.h"
10 #include "llvm/IR/LLVMContext.h"
11 #include "llvm/IR/Module.h"
12 #include "llvm/Support/CommandLine.h"
13 #include "llvm/Support/ManagedStatic.h"
14 #include "llvm/Support/MemoryBuffer.h"
15 #include "llvm/Support/FileSystem.h"
16 #include "llvm/Support/raw_ostream.h"
17 #include "llvm/Support/ErrorOr.h"
18 #include "llvm/Support/ToolOutputFile.h"
19 #include "llvm/Config/llvm-config.h"
20
21 #include <system_error>
22
23 using namespace llvm;
24
25 static cl::opt<std::string>
26 InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
27
28 static cl::opt<std::string>
29 OutputFilename("o", cl::desc("Output filename"),
30 cl::value_desc("filename"));
31
main(int argc,char ** argv)32 int main(int argc, char **argv) {
33 LLVMContext Context;
34 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
35
36 cl::ParseCommandLineOptions(argc, argv, "libclc builtin preparation tool\n");
37
38 std::string ErrorMessage;
39 Module *M = nullptr;
40
41 {
42 ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
43 MemoryBuffer::getFile(InputFilename);
44 if (std::error_code ec = BufferOrErr.getError()) {
45 ErrorMessage = ec.message();
46 } else {
47 std::unique_ptr<MemoryBuffer> &BufferPtr = BufferOrErr.get();
48 ErrorOr<std::unique_ptr<Module>> ModuleOrErr =
49 #if HAVE_LLVM > 0x0390
50 expectedToErrorOrAndEmitErrors(Context,
51 parseBitcodeFile(BufferPtr.get()->getMemBufferRef(), Context));
52 #else
53 parseBitcodeFile(BufferPtr.get()->getMemBufferRef(), Context);
54 #endif
55 if (std::error_code ec = ModuleOrErr.getError())
56 ErrorMessage = ec.message();
57
58 M = ModuleOrErr.get().release();
59 }
60 }
61
62 if (!M) {
63 errs() << argv[0] << ": ";
64 if (ErrorMessage.size())
65 errs() << ErrorMessage << "\n";
66 else
67 errs() << "bitcode didn't read correctly.\n";
68 return 1;
69 }
70
71 // Strip the OpenCL version metadata. There are a lot of linked
72 // modules in the library build, each spamming the same
73 // version. This may also report a different version than the user
74 // program is using. This should probably be uniqued when linking.
75 if (NamedMDNode *OCLVersion = M->getNamedMetadata("opencl.ocl.version"))
76 M->eraseNamedMetadata(OCLVersion);
77
78 // Set linkage of every external definition to linkonce_odr.
79 for (Module::iterator i = M->begin(), e = M->end(); i != e; ++i) {
80 if (!i->isDeclaration() && i->getLinkage() == GlobalValue::ExternalLinkage)
81 i->setLinkage(GlobalValue::LinkOnceODRLinkage);
82 }
83
84 for (Module::global_iterator i = M->global_begin(), e = M->global_end();
85 i != e; ++i) {
86 if (!i->isDeclaration() && i->getLinkage() == GlobalValue::ExternalLinkage)
87 i->setLinkage(GlobalValue::LinkOnceODRLinkage);
88 }
89
90 if (OutputFilename.empty()) {
91 errs() << "no output file\n";
92 return 1;
93 }
94
95 std::error_code EC;
96 #if HAVE_LLVM >= 0x0600
97 std::unique_ptr<ToolOutputFile> Out(
98 new ToolOutputFile(OutputFilename, EC, sys::fs::F_None));
99 #else
100 std::unique_ptr<tool_output_file> Out(
101 new tool_output_file(OutputFilename, EC, sys::fs::F_None));
102 #endif
103 if (EC) {
104 errs() << EC.message() << '\n';
105 exit(1);
106 }
107
108 #if HAVE_LLVM >= 0x0700
109 WriteBitcodeToFile(*M, Out->os());
110 #else
111 WriteBitcodeToFile(M, Out->os());
112 #endif
113
114 // Declare success.
115 Out->keep();
116 return 0;
117 }
118
119