Branch data     Line data    Source code

       1                 :            : //===-- abi_win64.cpp - Windows x86_64 ABI description ----------*- C++ -*-===//
       2                 :            : //
       3                 :            : //                         LDC – the LLVM D compiler
       4                 :            : //
       5                 :            : // This file is distributed under the BSD-style LDC license:
       6                 :            : //
       7                 :            : // Copyright (c) 2007-2012 LDC Team.
       8                 :            : // All rights reserved.
       9                 :            : //
      10                 :            : // Redistribution and use in source and binary forms, with or without
      11                 :            : // modification, are permitted provided that the following conditions are met:
      12                 :            : //
      13                 :            : //     * Redistributions of source code must retain the above copyright notice,
      14                 :            : //       this list of conditions and the following disclaimer.
      15                 :            : //     * Redistributions in binary form must reproduce the above copyright notice,
      16                 :            : //       this list of conditions and the following disclaimer in the documentation
      17                 :            : //       and/or other materials provided with the distribution.
      18                 :            : //     * Neither the name of the LDC Team nor the names of its contributors may be
      19                 :            : //       used to endorse or promote products derived from this software without
      20                 :            : //       specific prior written permission.
      21                 :            : //
      22                 :            : // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
      23                 :            : // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
      24                 :            : // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
      25                 :            : // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
      26                 :            : // ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
      27                 :            : // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
      28                 :            : // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
      29                 :            : // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      30                 :            : // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
      31                 :            : // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      32                 :            : //
      33                 :            : //===----------------------------------------------------------------------===//
      34                 :            : //
      35                 :            : // The ABI implementation used for 64 bit x86 (i.e. x86_64/AMD64/x64) targets
      36                 :            : // on Windows.
      37                 :            : //
      38                 :            : //===----------------------------------------------------------------------===//
      39                 :            : 
      40                 :            : // whether the argument can be passed in register
      41                 :          0 : static bool win64_reg_size(size_t size)
      42                 :            : {
      43   [ #  #  #  #  :          0 :     return size <= 2 || size == 4 || size == 8;
                   #  # ]
      44                 :            : }
      45                 :            : 
      46                 :            : struct ABI_Win64Layout : AbiLayout {
      47                 :            : int nargs;
      48                 :            : ABI_Win64Layout() : nargs(0) { }
      49                 :            : 
      50                 :            : bool use_sret(jl_datatype_t *dt, LLVMContext &ctx) override
      51                 :            : {
      52                 :            :     size_t size = jl_datatype_size(dt);
      53                 :            :     if (win64_reg_size(size) || is_native_simd_type(dt))
      54                 :            :         return false;
      55                 :            :     nargs++;
      56                 :            :     return true;
      57                 :            : }
      58                 :            : 
      59                 :            : bool needPassByRef(jl_datatype_t *dt, AttrBuilder &ab, LLVMContext &ctx, Type *Ty) override
      60                 :            : {
      61                 :            :     nargs++;
      62                 :            :     size_t size = jl_datatype_size(dt);
      63                 :            :     if (win64_reg_size(size))
      64                 :            :         return false;
      65                 :            :     if (nargs <= 4) {
      66                 :            :         ab.addByValAttr(Ty);
      67                 :            :     }
      68                 :            :     return true;
      69                 :            : }
      70                 :            : 
      71                 :            : Type *preferred_llvm_type(jl_datatype_t *dt, bool isret, LLVMContext &ctx) const override
      72                 :            : {
      73                 :            :     size_t size = jl_datatype_size(dt);
      74                 :            :     if (size > 0 && win64_reg_size(size) && !jl_is_primitivetype(dt))
      75                 :            :         return Type::getIntNTy(ctx, jl_datatype_nbits(dt));
      76                 :            :     return NULL;
      77                 :            : }
      78                 :            : 
      79                 :            : };