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Refactor and fix intrinsics for variadic functions

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I.e., va_start(), va_copy() and va_arg().
This commit is contained in:
Martin 2016-06-27 22:40:50 +02:00
parent dfbb6c5b08
commit 82005009e7
9 changed files with 92 additions and 99 deletions
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11
gen/functions.cpp
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@ -971,13 +971,14 @@ void DtoDefineFunction(FuncDeclaration *fd) {
// D varargs: prepare _argptr and _arguments
if (f->linkage == LINKd && f->varargs == 1) {
// allocate _argptr (of type core.stdc.stdarg.va_list)
LLValue *argptrmem = DtoAlloca(
Type::tvalist->semantic(fd->loc, fd->_scope), "_argptr_mem");
irFunc->_argptr = argptrmem;
Type *const argptrType = Type::tvalist->semantic(fd->loc, fd->_scope);
LLValue *argptrMem = DtoAlloca(argptrType, "_argptr_mem");
irFunc->_argptr = argptrMem;
// initialize _argptr with a call to the va_start intrinsic
LLValue *vaStartArg = gABI->prepareVaStart(argptrmem);
llvm::CallInst::Create(GET_INTRINSIC_DECL(vastart), vaStartArg, "",
DLValue argptrVal(argptrType, argptrMem);
LLValue *llAp = gABI->prepareVaStart(&argptrVal);
llvm::CallInst::Create(GET_INTRINSIC_DECL(vastart), llAp, "",
gIR->scopebb());
// copy _arguments to a memory location