summaryrefslogtreecommitdiffstats
path: root/contrib/llvm/tools/clang/lib/CodeGen/CGCUDABuiltin.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/llvm/tools/clang/lib/CodeGen/CGCUDABuiltin.cpp')
-rw-r--r--contrib/llvm/tools/clang/lib/CodeGen/CGCUDABuiltin.cpp123
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}));
-}
OpenPOWER on IntegriCloud