vsavchenko added inline comments.
================
Comment at: clang/lib/StaticAnalyzer/Core/RangeConstraintManager.cpp:1400
+ if (ResultType.isUnsigned()) {
+ LHS.From().uadd_ov(RHS.From(), HasMinOverflowed);
+ LHS.To().uadd_ov(RHS.To(), HasMaxOverflowed);
----------------
manas wrote:
> Using `uadd_ov` (and `sadd_ov`), we can get the added value as well as
> whether overflow occurred or not. A point is that these functions return
> `APInt` instead of `APSInt`.
>
> But when I tried just using:
> Min = LHS.From().uadd_ov(RHS.From(), HasMinOverflowed);
> Max = LHS.To().uadd_ov(RHS.From(), HasMaxOverflowed);
>
> instead of
> Min = LHS.From() + RHS.From();
> Max = LHS.To() + RHS.To();
>
> just for the added value, then the following tests failed (//these tests and
> all other tests pass when I use the latter method to get Min/Max//):
>
> Clang :: Analysis/PR3991.m
> Clang :: Analysis/global-region-invalidation.c
> Clang :: Analysis/malloc-overflow2.c
> Clang :: Analysis/out-of-bounds-new.cpp
> Clang :: Analysis/taint-generic.c
>
> I am working on fixing this part.
You can easily construct `APSInt` from `APInt` using `APSInt ::APSInt(APInt I,
bool isUnsigned)` constructor.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D103440/new/
https://reviews.llvm.org/D103440
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
