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4cf4690ab0
0.15.1 used stdcall convention everywhere. But the ABI change in 0.15.2 requires use of the C calling convention for variadic calls on x86 because the stdcall convention does not support vararg functions. Solution is to check the llvm::FunctionType if the function has varargs. This commit also makes the C calling convention the global default because according to the LLVM documentation the fastcc convention used for D linkage does not support varargs. This fixes issue #1000.
78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
//===-- gen/abi-mips64.cpp - MIPS64 ABI description ------------*- C++ -*-===//
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//
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// LDC – the LLVM D compiler
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//
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// This file is distributed under the BSD-style LDC license. See the LICENSE
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// file for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// The MIPS64 N32 and N64 ABI can be found here:
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// http://techpubs.sgi.com/library/dynaweb_docs/0640/SGI_Developer/books/Mpro_n32_ABI/sgi_html/index.html
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//
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//===----------------------------------------------------------------------===//
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#include "gen/abi.h"
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#include "gen/abi-generic.h"
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#include "gen/abi-mips64.h"
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#include "gen/dvalue.h"
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#include "gen/irstate.h"
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#include "gen/llvmhelpers.h"
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#include "gen/tollvm.h"
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struct MIPS64TargetABI : TargetABI {
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ExplicitByvalRewrite byvalRewrite;
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IntegerRewrite integerRewrite;
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const bool Is64Bit;
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MIPS64TargetABI(const bool Is64Bit) : Is64Bit(Is64Bit)
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{ }
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bool returnInArg(TypeFunction* tf)
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{
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if (tf->isref)
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return false;
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// Return structs and static arrays on the stack. The latter is needed
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// because otherwise LLVM tries to actually return the array in a number
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// of physical registers, which leads, depending on the target, to
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// either horrendous codegen or backend crashes.
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Type* rt = tf->next->toBasetype();
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return (rt->ty == Tstruct || rt->ty == Tsarray);
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}
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bool passByVal(Type* t)
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{
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TY ty = t->toBasetype()->ty;
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return ty == Tstruct || ty == Tsarray;
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}
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void rewriteFunctionType(TypeFunction* tf, IrFuncTy &fty)
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{
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for (IrFuncTy::ArgIter I = fty.args.begin(), E = fty.args.end(); I != E; ++I)
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{
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IrFuncTyArg& arg = **I;
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if (!arg.byref)
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rewriteArgument(fty, arg);
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}
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}
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void rewriteArgument(IrFuncTy& fty, IrFuncTyArg& arg)
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{
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// FIXME
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}
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// Returns true if the D type can be bit-cast to an integer of the same size.
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bool canRewriteAsInt(Type* t)
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{
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const unsigned size = t->size();
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return size == 1 || size == 2 || size == 4 || (Is64Bit && size == 8);
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}
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};
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// The public getter for abi.cpp
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TargetABI* getMIPS64TargetABI(bool Is64Bit)
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{
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return new MIPS64TargetABI(Is64Bit);
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}
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