D/ldc
1
0
Fork 0
mirror of https://github.com/xomboverlord/ldc.git synced 2026-02-09 08:23:20 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Allow multiple declarations to share the same mangled name/LLVM global.

Browse Source 
This is necessary to enable aliasing compiler-generated
symbols with pragma(mangle, …).

Note that globals for internal use are still directly
created.
This commit is contained in:
David Nadlinger
2013-06-16 00:12:02 +02:00
parent 0305d3bce2
commit acd508945a
9 changed files with 63 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
gen/declarations.cpp
View File

@@ -98,23 +98,6 @@ void TupleDeclaration::codegen(Ir* p)
/* ================================================================== */
static llvm::GlobalVariable* createGlobal(llvm::Type* type, bool isConst,
llvm::GlobalValue::LinkageTypes linkage, llvm::StringRef name,
bool isThreadLocal)
{
#if LDC_LLVM_VER >= 302
// FIXME: clang uses a command line option for the thread model
const llvm::GlobalVariable::ThreadLocalMode tlsModel =
isThreadLocal ? llvm::GlobalVariable::GeneralDynamicTLSModel
: llvm::GlobalVariable::NotThreadLocal;
return new llvm::GlobalVariable(*gIR->module, type, isConst, linkage,
NULL, name, 0, tlsModel);
#else
return new llvm::GlobalVariable(*gIR->module, type, isConst, linkage,
NULL, name, 0, isThreadLocal);
#endif
}
void VarDeclaration::codegen(Ir* p)
{
Logger::print("VarDeclaration::codegen(): %s | %s\n", toChars(), type->toChars());
@@ -171,8 +154,9 @@ void VarDeclaration::codegen(Ir* p)
// this->ir.irGlobal->value!), and in case we also do an initializer
// with a different type later, swap it out and replace any existing
// uses with bitcasts to the previous type.
llvm::GlobalVariable* gvar = createGlobal(i1ToI8(DtoType(type)), isLLConst,
llLinkage, llName, isThreadlocal());
llvm::GlobalVariable* gvar = getOrCreateGlobal(loc, *gIR->module,
i1ToI8(DtoType(type)), isLLConst, llLinkage, 0, llName,
isThreadlocal());
this->ir.irGlobal->value = gvar;
// Check if we are defining or just declaring the global in this module.
@@ -184,8 +168,8 @@ void VarDeclaration::codegen(Ir* p)
// In case of type mismatch, swap out the variable.
if (initVal->getType() != gvar->getType()->getElementType())
{
llvm::GlobalVariable* newGvar = createGlobal(
initVal->getType(), isLLConst, llLinkage,
llvm::GlobalVariable* newGvar = getOrCreateGlobal(loc,
*gIR->module, initVal->getType(), isLLConst, llLinkage, 0,
"", // We take on the name of the old global below.
isThreadlocal());