[PATCH] D54486: BumpPtrAllocator: Add a couple of fancy wrapper methods around identifyObject().
Artem Dergachev via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Dec 3 13:34:47 PST 2018
NoQ updated this revision to Diff 176469.
NoQ added a comment.
Update comments.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D54486/new/
https://reviews.llvm.org/D54486
Files:
include/llvm/Support/Allocator.h
Index: include/llvm/Support/Allocator.h
===================================================================
--- include/llvm/Support/Allocator.h
+++ include/llvm/Support/Allocator.h
@@ -311,6 +311,33 @@
return None;
}
+ /// A wrapper around identifyObject that additionally asserts that
+ /// the object is indeed within the allocator.
+ /// \return An index uniquely and reproducibly identifying
+ /// an input pointer \p Ptr in the given allocator.
+ int64_t identifyKnownObject(const void *Ptr) {
+ Optional<int64_t> Out = identifyObject(Ptr);
+ assert(Out && "Wrong allocator used");
+ return *Out;
+ }
+
+ /// A wrapper around identifyKnownObject. Accepts type information
+ /// about the object and produces a smaller identifier by relying on
+ /// the alignment information. Note that sub-classes may have different
+ /// alignment, so the most base class should be passed as template parameter
+ /// in order to obtain correct results. For that reason automatic template
+ /// parameter deduction is disabled.
+ /// \return An index uniquely and reproducibly identifying
+ /// an input pointer \p Ptr in the given allocator. This identifier is
+ /// different from the ones produced by identifyObject and
+ /// identifyAlignedObject.
+ template <typename T>
+ int64_t identifyKnownAlignedObject(const void *Ptr) {
+ int64_t Out = identifyKnownObject(Ptr);
+ assert(Out % alignof(T) == 0 && "Wrong alignment information");
+ return Out / alignof(T);
+ }
+
size_t getTotalMemory() const {
size_t TotalMemory = 0;
for (auto I = Slabs.begin(), E = Slabs.end(); I != E; ++I)
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