balazske marked an inline comment as done.
balazske added inline comments.
================
Comment at: clang/test/Analysis/cfg.cpp:570
}
+// CHECK-LABEL: void vla_simple(int x)
----------------
balazske wrote:
> aaron.ballman wrote:
> > Can you also add tests for:
> > ```
> > int vla_unevaluated(int x) {
> > // Evaluates the ++x
> > sizeof(int[++x]);
> > // Does not evaluate the ++x
> > _Alignof(int[++x]);
> > _Generic((int(*)[++x])0, default : 0);
> >
> > return x;
> > }
> > ```
> >
> > Also, it's a bit strange to find these VLA tests in a .cpp file. VLAs are a
> > C++ extension and we should have some testing for them for constructs that
> > are C++-specific, but I would have expected many of these tests to be in a
> > C file instead.
> Could be there platforms (on buildbot?) where the VLA code (in cpp file) does
> not compile? Is it worth to have a test with VLA type alias then?
I have this output for the test above (without the new code), is it correct?
(The `++` seems to be evaluated for the `alignof` statement too.)
```
int vla_unevaluated(int x)
[B2 (ENTRY)]
Succs (1): B1
[B1]
1: x
2: ++[B1.1]
3: [B1.2] (ImplicitCastExpr, LValueToRValue, int)
4: sizeof(int [++x])
5: x
6: ++[B1.5]
7: [B1.6] (ImplicitCastExpr, LValueToRValue, int)
8: alignof(int [++x])
9: 0
10: x
11: [B1.10] (ImplicitCastExpr, LValueToRValue, int)
12: return [B1.11];
Preds (1): B2
Succs (1): B0
[B0 (EXIT)]
Preds (1): B1
```
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D77809/new/
https://reviews.llvm.org/D77809
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