This patch generalizes the MemoryAllocation pass (alloca -> heap) to
handle fir.alloca regardless of their postion in the IR. Currently, it
only dealt with fir.alloca in function entry blocks. The logic is placed
in a utility that can be used to replace alloca in an operation on
demand to whatever kind of allocation the utility user wants via
callbacks (allocmem, or custom runtime calls to instrument the code...).
To do so, a concept of ownership, that was already implied a bit and
used in passes like stack-reclaim, is formalized. Any operation with the
LoopLikeInterface, AutomaticAllocationScope, or IsolatedFromAbove owns
the alloca directly nested inside its regions, and they must not be used
after the operation.
The pass then looks for the exit points of region with such interface,
and use that to insert deallocation. If dominance is not proved, the
pass fallbacks to storing the new address into a C pointer variable
created in the entry of the owning region which allows inserting
deallocation as needed, included near the alloca itself to avoid leaks
when the alloca is executed multiple times due to block CFGs loops.
This should fix https://github.com/llvm/llvm-project/issues/88344.
In a next step, I will try to refactor lowering a bit to introduce
lifetime operation for alloca so that the deallocation points can be
inserted as soon as possible.
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This partially reverts commit 7aedd7dc754c74a49fe84ed2640e269c25414087.
This change removes calls to the deprecated member functions. It does
not mark the functions deprecated yet and does not disable the
deprecation warning in TypeSwitch. This seems to cause problems with
MSVC.
This is another one that runs on functions but isn't appropriate to also
run on other top level operations. It needs to find all paths that
return from the function to free heap allocated memory. There isn't a
generic concept for general top level operations which is equivalent to
looking for function returns.
I removed the manual definition of the options structure because there
is already an identical definition in tablegen and the options are
documented in Passes.td.
This is part of an effort to migrate from llvm::Optional to
std::optional. This patch changes the way mlir-tblgen generates .inc
files, and modifies tests and documentation appropriately. It is a "no
compromises" patch, and doesn't leave the user with an unpleasant mix of
llvm::Optional and std::optional.
A non-trivial change has been made to ControlFlowInterfaces to split one
constructor into two, relating to a build failure on Windows.
See also: https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716
Signed-off-by: Ramkumar Ramachandra <r@artagnon.com>
Differential Revision: https://reviews.llvm.org/D138934
The patch introduces the required changes to update the pass declarations and definitions to use the new autogenerated files and allow dropping the old infrastructure.
Reviewed By: mehdi_amini, rriddle
Differential Review: https://reviews.llvm.org/D132838
The patch introduces the required changes to update the pass declarations and definitions to use the new autogenerated files and allow dropping the old infrastructure.
Reviewed By: mehdi_amini, rriddle
Differential Review: https://reviews.llvm.org/D132838
This commit restructures how TypeID is implemented to ideally avoid
the current problems related to shared libraries. This is done by changing
the "implicit" fallback path to use the name of the type, instead of using
a static template variable (which breaks shared libraries). The major downside to this
is that it adds some additional initialization costs for the implicit path. Given the
use of type names for uniqueness in the fallback, we also no longer allow types
defined in anonymous namespaces to have an implicit TypeID. To simplify defining
an ID for these classes, a new `MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID` macro
was added to allow for explicitly defining a TypeID directly on an internal class.
To help identify when types are using the fallback, `-debug-only=typeid` can be
used to log which types are using implicit ids.
This change generally only requires changes to the test passes, which are all defined
in anonymous namespaces, and thus can't use the fallback any longer.
Differential Revision: https://reviews.llvm.org/D122775
The last remaining operations in the standard dialect all revolve around
FuncOp/function related constructs. This patch simply handles the initial
renaming (which by itself is already huge), but there are a large number
of cleanups unlocked/necessary afterwards:
* Removing a bunch of unnecessary dependencies on Func
* Cleaning up the From/ToStandard conversion passes
* Preparing for the move of FuncOp to the Func dialect
See the discussion at https://discourse.llvm.org/t/standard-dialect-the-final-chapter/6061
Differential Revision: https://reviews.llvm.org/D120624
`kEmitAccessorPrefix_Raw ` is being removed, and so updating the
accessors to `kEmitAccessorPrefix_Prefixed`.
Reviewed By: clementval
Differential Revision: https://reviews.llvm.org/D119812
OwningRewritePatternList has been deprecated for ~10 months now, we can remove
the leftover using directives at this point.
Differential Revision: https://reviews.llvm.org/D118287
Add the MemoryAllocation pass into the pipeline. Add
the possibilty to pass the options directly within the tool (tco).
This patch is part of the upstreaming effort from fir-dev branch.
Reviewed By: jeanPerier
Differential Revision: https://reviews.llvm.org/D117886
This pass can reclassify memory allocations (fir.alloca, fir.allocmem)
based on heuristics and settings. The intention is to allow better
performance and workarounds for conditions such as environments with
limited stack space.
Currently, implements two conversions from stack to heap allocation.
1. If a stack allocation is an array larger than some threshold value
make it a heap allocation.
2. If a stack allocation is an array with a runtime evaluated size make
it a heap allocation.
Add a lit test for both suboptions.
Reviewed By: PeteSteinfeld, vdonaldson
Differential Revision: https://reviews.llvm.org/D115763
