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view ir/irtypefunction.cpp @ 1499:df11cdec45a2
Another shot at fixing the issues with (constant) struct literals and their addresses. See DMD2682, #218, #324.
The idea is to separate the notion of const from 'this variable can always be
replaced with its initializer' in the frontend. To do that, I introduced
Declaration::isSameAsInitializer, which is overridden in VarDeclaration to
return false for constants that have a struct literal initializer.
So
{{{
const S s = S(5);
void foo() { auto ps = &s; }
// is no longer replaced by
void foo() { auto ps = &(S(5)); }
}}}
To make taking the address of a struct constant with a struct-initializer
outside of function scope possible, I made sure that AddrExp::optimize doesn't
try to run the argument's optimization with WANTinterpret - that'd again
replace the constant with a struct literal temporary.
author | Christian Kamm <kamm incasoftware de> |
---|---|
date | Sun, 14 Jun 2009 19:49:58 +0200 |
parents | 46f6365a50d7 |
children | 755abafbf25d |
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#include "llvm/DerivedTypes.h" #include "mtype.h" #include "gen/irstate.h" #include "gen/tollvm.h" #include "gen/functions.h" #include "ir/irtypefunction.h" IrTypeFunction::IrTypeFunction(Type * dt) : IrType(dt, llvm::OpaqueType::get()) { irfty = NULL; } const llvm::Type * IrTypeFunction::buildType() { const llvm::Type* T; TypeFunction* tf = (TypeFunction*)dtype; if (tf->funcdecl) T = DtoFunctionType(tf->funcdecl); else T = DtoFunctionType(tf,NULL,NULL); llvm::cast<llvm::OpaqueType>(pa.get())->refineAbstractTypeTo(T); return pa.get(); } ////////////////////////////////////////////////////////////////////////////// IrTypeDelegate::IrTypeDelegate(Type * dt) : IrType(dt, llvm::OpaqueType::get()) { } const llvm::Type * IrTypeDelegate::buildType() { assert(dtype->ty == Tdelegate); const LLType* i8ptr = getVoidPtrType(); const LLType* func = DtoFunctionType(dtype->nextOf(), NULL, Type::tvoid->pointerTo()); const LLType* funcptr = getPtrToType(func); const LLStructType* dgtype = LLStructType::get(i8ptr, funcptr, NULL); gIR->module->addTypeName(dtype->toChars(), dgtype); llvm::cast<llvm::OpaqueType>(pa.get())->refineAbstractTypeTo(dgtype); return pa.get(); }