We want to generally treat blocks as heap objects until proven stack-able by escape analysis, like we do generally with other heap entities. The only place we should be exposed to stack blocks is when they're passed as arguments, so handle this by copy_block'ing any block arguments we get in the function prolog. Optimization can eliminate them when analysis shows the block doesn't escape or is already on the heap.
Swift SVN r16096
If all of the bindings in a pattern column are 'let' bindings, don't box the binding. If there is any 'var' in the column, conservatively fall back to binding a box. Factor out the logic for producing an initialization for a variable into an new emitInitializationForVarDecl method that SILGenPattern can use. Add a 'copyInto' method to RValue that can bind a copy of an rvalue to an Initialization.
This doesn't use Chris's new +0 ManagedValue optimization yet, so we end up with an extra copy_value when the value is bound that might still be avoidable.
Swift SVN r12903
as ::copy, but doesn't have the assertion that the copied-from
value has a cleanup associated with it. Various bits of silgen
are trafficing in SILValue's when they are known to be live, and
this allows us to use the centralized "copy" instead of rolling
it ourselves inline.
Swift SVN r11929
making LValue ManagedValues, and switch SILGenLValue to use
this form of managed value consistently for lvalues, instead of
using unmanaged values in some cases. NFC.
Swift SVN r11878
with qualifiers on it, we have two distinct types:
- LValueType(T) aka @lvalue T, which is used for mutable values on the LHS of an
assignment in the typechecker.
- InOutType(T) aka @inout T, which is used for @inout arguments, and the implicit
@inout self argument of mutable methods on value types. This type is also used
at the SIL level for address types.
While I detangled a number of cases that were checking for LValueType (without checking
qualifiers) and only meant @inout or @lvalue, there is more to be done here. Notably,
getRValueType() still strips @inout, which is totally and unbearably wrong.
Swift SVN r11727
emit the cleanup for the initializing expression when the expression was
complete, instead of at the end of the let decl scope (releasing things
too early).
This fixes rdar://15689514, thanks to DaveA for the great testcase.
Swift SVN r11516
of having to lower to an RValue.
This is valuable because we can often emit an expression to a
desired abstraction level more efficiently than just emitting
it to minimal abstraction and then generalizing.
Swift SVN r10455
If a struct has [unowned] fields and an implicit elementwise constructor, then the constructor receives a strong reference argument corresponding to the unowned field, and we have to introduce that conversion as part of the construction.
Swift SVN r8207
Tuple exploding happens during RValue construction, so changed the constructor and addElement() method to take the location parameter. The imploding happens on RValue::forwardAsSingleValue and RValue::getAsSingleValue(). Make sure the right SIL locations are passed to all of these
Also, added some missing locations in pattern matching code.
Swift SVN r7916
