diff options
Diffstat (limited to 'contrib/llvm/tools/clang/lib/CodeGen/CGCUDABuiltin.cpp')
-rw-r--r-- | contrib/llvm/tools/clang/lib/CodeGen/CGCUDABuiltin.cpp | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/contrib/llvm/tools/clang/lib/CodeGen/CGCUDABuiltin.cpp b/contrib/llvm/tools/clang/lib/CodeGen/CGCUDABuiltin.cpp deleted file mode 100644 index 44dd003..0000000 --- a/contrib/llvm/tools/clang/lib/CodeGen/CGCUDABuiltin.cpp +++ /dev/null @@ -1,123 +0,0 @@ -//===----- CGCUDABuiltin.cpp - Codegen for CUDA builtins ------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// Generates code for built-in CUDA calls which are not runtime-specific. -// (Runtime-specific codegen lives in CGCUDARuntime.) -// -//===----------------------------------------------------------------------===// - -#include "CodeGenFunction.h" -#include "clang/Basic/Builtins.h" -#include "llvm/IR/DataLayout.h" -#include "llvm/IR/Instruction.h" -#include "llvm/Support/MathExtras.h" - -using namespace clang; -using namespace CodeGen; - -static llvm::Function *GetVprintfDeclaration(llvm::Module &M) { - llvm::Type *ArgTypes[] = {llvm::Type::getInt8PtrTy(M.getContext()), - llvm::Type::getInt8PtrTy(M.getContext())}; - llvm::FunctionType *VprintfFuncType = llvm::FunctionType::get( - llvm::Type::getInt32Ty(M.getContext()), ArgTypes, false); - - if (auto* F = M.getFunction("vprintf")) { - // Our CUDA system header declares vprintf with the right signature, so - // nobody else should have been able to declare vprintf with a bogus - // signature. - assert(F->getFunctionType() == VprintfFuncType); - return F; - } - - // vprintf doesn't already exist; create a declaration and insert it into the - // module. - return llvm::Function::Create( - VprintfFuncType, llvm::GlobalVariable::ExternalLinkage, "vprintf", &M); -} - -// Transforms a call to printf into a call to the NVPTX vprintf syscall (which -// isn't particularly special; it's invoked just like a regular function). -// vprintf takes two args: A format string, and a pointer to a buffer containing -// the varargs. -// -// For example, the call -// -// printf("format string", arg1, arg2, arg3); -// -// is converted into something resembling -// -// struct Tmp { -// Arg1 a1; -// Arg2 a2; -// Arg3 a3; -// }; -// char* buf = alloca(sizeof(Tmp)); -// *(Tmp*)buf = {a1, a2, a3}; -// vprintf("format string", buf); -// -// buf is aligned to the max of {alignof(Arg1), ...}. Furthermore, each of the -// args is itself aligned to its preferred alignment. -// -// Note that by the time this function runs, E's args have already undergone the -// standard C vararg promotion (short -> int, float -> double, etc.). -RValue -CodeGenFunction::EmitCUDADevicePrintfCallExpr(const CallExpr *E, - ReturnValueSlot ReturnValue) { - assert(getLangOpts().CUDA); - assert(getLangOpts().CUDAIsDevice); - assert(E->getBuiltinCallee() == Builtin::BIprintf); - assert(E->getNumArgs() >= 1); // printf always has at least one arg. - - const llvm::DataLayout &DL = CGM.getDataLayout(); - llvm::LLVMContext &Ctx = CGM.getLLVMContext(); - - CallArgList Args; - EmitCallArgs(Args, - E->getDirectCallee()->getType()->getAs<FunctionProtoType>(), - E->arguments(), E->getDirectCallee(), - /* ParamsToSkip = */ 0); - - // We don't know how to emit non-scalar varargs. - if (std::any_of(Args.begin() + 1, Args.end(), - [](const CallArg &A) { return !A.RV.isScalar(); })) { - CGM.ErrorUnsupported(E, "non-scalar arg to printf"); - return RValue::get(llvm::ConstantInt::get(IntTy, 0)); - } - - // Construct and fill the args buffer that we'll pass to vprintf. - llvm::Value *BufferPtr; - if (Args.size() <= 1) { - // If there are no args, pass a null pointer to vprintf. - BufferPtr = llvm::ConstantPointerNull::get(llvm::Type::getInt8PtrTy(Ctx)); - } else { - llvm::SmallVector<llvm::Type *, 8> ArgTypes; - for (unsigned I = 1, NumArgs = Args.size(); I < NumArgs; ++I) - ArgTypes.push_back(Args[I].RV.getScalarVal()->getType()); - - // Using llvm::StructType is correct only because printf doesn't accept - // aggregates. If we had to handle aggregates here, we'd have to manually - // compute the offsets within the alloca -- we wouldn't be able to assume - // that the alignment of the llvm type was the same as the alignment of the - // clang type. - llvm::Type *AllocaTy = llvm::StructType::create(ArgTypes, "printf_args"); - llvm::Value *Alloca = CreateTempAlloca(AllocaTy); - - for (unsigned I = 1, NumArgs = Args.size(); I < NumArgs; ++I) { - llvm::Value *P = Builder.CreateStructGEP(AllocaTy, Alloca, I - 1); - llvm::Value *Arg = Args[I].RV.getScalarVal(); - Builder.CreateAlignedStore(Arg, P, DL.getPrefTypeAlignment(Arg->getType())); - } - BufferPtr = Builder.CreatePointerCast(Alloca, llvm::Type::getInt8PtrTy(Ctx)); - } - - // Invoke vprintf and return. - llvm::Function* VprintfFunc = GetVprintfDeclaration(CGM.getModule()); - return RValue::get( - Builder.CreateCall(VprintfFunc, {Args[0].RV.getScalarVal(), BufferPtr})); -} |