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Properly handle DMD-internal "reference variables".

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Previously, we just had a hack to make ref foreach statements work.
This commit enables them to work in other cases as well, like the
implicit __result variable for functions with out-contracts (which
is such a magic ref variable for ref-returning functions).

Fixes DMD testcase 'testcontracts'.
This commit is contained in:
David Nadlinger 2012-09-04 01:36:52 +02:00
parent 6b1b84a28d
commit ee4285f934
8 changed files with 173 additions and 172 deletions
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9
gen/llvmhelpers.h
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@ -98,6 +98,7 @@ void DtoResolveDsymbol(Dsymbol* dsym);
void DtoConstInitGlobal(VarDeclaration* vd);
// declaration inside a declarationexp
void DtoVarDeclaration(VarDeclaration* var);
DValue* DtoDeclarationExp(Dsymbol* declaration);
LLValue* DtoRawVarDeclaration(VarDeclaration* var, LLValue* addr = 0);
@ -158,6 +159,14 @@ LLValue* makeLValue(Loc& loc, DValue* value);
void callPostblit(Loc &loc, Expression *exp, LLValue *val);
#endif
/// Returns whether the given variable is a DMD-internal "ref variable".
///
/// D doesn't have reference variables (the ref keyword is only usable in
/// function signatures and foreach headers), but the DMD frontend internally
/// creates them in cases like lowering a ref foreach to a for loop or the
/// implicit __result variable for ref-return functions with out contracts.
bool isSpecialRefVar(VarDeclaration* vd);
////////////////////////////////////////////
// gen/tocall.cpp stuff below
////////////////////////////////////////////