NoQ added inline comments.
================
Comment at: clang/lib/StaticAnalyzer/Core/SVals.cpp:151
+ Optional<QualType> VisitNonLocLazyCompoundVal(nonloc::LazyCompoundVal LCV) {
+ return Visit(LCV.getRegion());
+ }
----------------
vsavchenko wrote:
> NoQ wrote:
> > This is correct except you need to get the value type, not the pointer type.
> >
> > `LazyCompoundVal` is a `prvalue` and its parent region is the location in
> > which this `prvalue` resided some time in the past. So the parent region is
> > of the right type and it's always typed but you need the pointee type.
> OK then, can you maybe hint how can I write a test where this is going to be
> a pointer type (or maybe then `getType` for regions works incorrectly).
Regions have `getLocationType()` (the pointer type) and `getValueType()` (the
pointee type). I think you need to call the latter directly in this case,
bypassing recursion.
In order to obtain a live `LazyCompoundVal` specimen for testing purposes, you
need to load an entire compound object (not necessarily represented by a
`CompoundVal`) from Region Store.
Eg.,
```lang=c
struct MyStruct a;
// ...
struct MyStruct b = a; // Avoid C++ though, constructors are a different
beast.
```
Or you could construct one directly. But that, of course, wouldn't give you any
hints about the appropriate type.
> maybe then `getType` for regions works incorrectly
Hmm that's actually a good separate question. How do you know if a region
represents a prvalue of pointer type or a glvalue of pointee type (including,
but not limited to, references)? This can't be figured out without more context
just by looking at the `SVal`.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D104550/new/
https://reviews.llvm.org/D104550
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