zinovy.nis added inline comments.

================
Comment at: 
clang-tools-extra/test/clang-tidy/checkers/bugprone-redundant-branch-condition.cpp:1092
+      // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: redundant condition 'isSet' 
[bugprone-redundant-branch-condition]
+      // CHECK-FIXES: {{isSet}}
+    }
----------------
aaron.ballman wrote:
> zinovy.nis wrote:
> > aaron.ballman wrote:
> > > There's not a whole lot of context for FileCheck to determine if it's 
> > > been correctly applied or not (same below) -- for instance, won't this 
> > > pass even if no changes are applied because FileCheck is still going to 
> > > find `isSet` in the file?
> > Thanks. Fixed.
> Maybe it's just early in the morning for me, but... I was expecting the 
> transformation to be:
> ```
> if (RetT::Test(isSet).Ok() && isSet) {
>   if (RetT::Test(isSet).Ok() && isSet) {
>   }
> }
> ```
> turns into
> ```
> if (RetT::Test(isSet).Ok() && isSet) {
> }
> ```
> Why does it remove the `&& isSet` instead? That seems like it's changing the 
> logic here from `if (true && false)` to `if (true)`.
IMO it's correct.
`isSet` cannot change its value between `if`s while `RetT::Test(isSet).Ok()` 
can.
So we don't need to re-evaluate `isSet` and need to re-evaluate 
`RetT::Test(isSet).Ok()` only.



> That seems like it's changing the logic here from if (true && false) to if 
> (true).


As I understand only the second `if` is transformed.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D91037/new/

https://reviews.llvm.org/D91037

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