aaron.ballman added a comment.
In https://reviews.llvm.org/D33672#830492, @gamesh411 wrote:
> As for the the loss of precision problem, in the special case of char the
> size of char is known. However does the analysis have the necessary
> information in this stage to know the size of an int for example? I found
> bit-width specifying information in the llvm::Type class which is used in the
> code generation phase. It could be done by checking on a per type basis, but
> then again, it could possibly lead to false positives. Correct me if I am
> wrong.
The frontend has this information available to it as well, through the
`ASTContext`. See `getTypeSize()`, `getTypeSizeInChars()`, etc.
================
Comment at: lib/StaticAnalyzer/Checkers/EnumCastOutOfRangeChecker.cpp:74-75
+ EnumValueVector DeclValues;
+ for (const auto *D : ED->decls()) {
+ const auto ECD = dyn_cast<EnumConstantDecl>(D);
+ DeclValues.push_back(ECD->getInitVal());
----------------
aaron.ballman wrote:
> Instead of enumerating over `decls()` and then casting, just enumerate over
> `enumerators()` and the cast isn't needed. Or, even better:
> ```
> EnumValueVector DeclValues(ED->enumerator_end() - ED->enumerator_begin());
> std::transform(ED->enumerator_begin(), ED->enumerator_end(),
> DeclValues.begin(),
> [](const EnumConstantDecl *D) { return
> D->getInitVal(); });
> ```
I think my suggestion was a bit more efficient than your implementation, was
there a reason you avoided `std::transform()`?
================
Comment at: lib/StaticAnalyzer/Checkers/EnumCastOutOfRangeChecker.cpp:35
+ const DefinedOrUnknownSVal CompareValue;
+
+ const ProgramStateRef PS;
----------------
You can remove the newline.
https://reviews.llvm.org/D33672
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