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Merge pull request #494 from ldc-developers/unnamed-addr

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unnamed_addr for immutable array literals
This commit is contained in:
David Nadlinger
2013-10-08 21:54:03 -07:00
parent 498b7cfc2e 4987894468
commit c5d4897872
2 changed files with 9 additions and 9 deletions
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1
gen/arrays.cpp
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@@ -473,6 +473,7 @@ void initializeArrayLiteral(IRState* p, ArrayLiteralExp* ale, LLValue* dstMem)
constarr,
".arrayliteral"
);
gvar->setUnnamedAddr(true);
DtoMemCpy(dstMem, gvar, DtoConstSize_t(getTypePaddedSize(constarr->getType())));
}
}

17
gen/toir.cpp
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@@ -2945,21 +2945,20 @@ LLConstant* ArrayLiteralExp::toConstElem(IRState* p)
if (!dyn)
return initval;
// we need to put the initializer in a global, and so we have a pointer to the array
// Important: don't make the global constant, since this const initializer might
// be used as an initializer for a static T[] - where modifying contents is allowed.
LLConstant* globalstore = new LLGlobalVariable(*gIR->module,
initval->getType(), false, LLGlobalValue::InternalLinkage, initval,
bool canBeConst = type->isConst() || type->isImmutable();
llvm::GlobalVariable* gvar = new llvm::GlobalVariable(*gIR->module,
initval->getType(), canBeConst, llvm::GlobalValue::InternalLinkage, initval,
".dynarrayStorage");
globalstore = DtoBitCast(globalstore, getPtrToType(arrtype));
gvar->setUnnamedAddr(canBeConst);
llvm::Constant* store = DtoBitCast(gvar, getPtrToType(arrtype));
if (bt->ty == Tpointer)
// we need to return pointer to the static array.
return globalstore;
return store;
// build a constant dynamic array reference with the .ptr field pointing into globalstore
// build a constant dynamic array reference with the .ptr field pointing into store
LLConstant* idxs[2] = { DtoConstUint(0), DtoConstUint(0) };
LLConstant* globalstorePtr = llvm::ConstantExpr::getGetElementPtr(globalstore, idxs, true);
LLConstant* globalstorePtr = llvm::ConstantExpr::getGetElementPtr(store, idxs, true);
return DtoConstSlice(DtoConstSize_t(elements->dim), globalstorePtr);
}