[llvm] [SLP]Improve minbitwidth analysis. (PR #78976)

[Alexey Bataev via llvm-commits]

alexey-bataev wrote:

> Seems to break the build, maybe on GCC only?
> 
> ```
> 
> /var/llvm-compile-time-tracker/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:3617:24: error: declaration of ‘llvm::TargetTransformInfo* llvm::slpvectorizer::BoUpSLP::TTI’ changes meaning of ‘TTI’ [-fpermissive]
>  3617 |   TargetTransformInfo *TTI;
>       |                        ^~~
> In file included from /var/llvm-compile-time-tracker/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:48:
> /var/llvm-compile-time-tracker/llvm-project/llvm/include/llvm/Analysis/TargetTransformInfo.h:206:29: note: ‘TTI’ declared here as ‘typedef class llvm::TargetTransformInfo llvm::TTI’
>   206 | typedef TargetTransformInfo TTI;
>       |                             ^~~
> ```

Am, I did not touch this code. Probably, some kind of side effect. Could you provide full error report?

https://github.com/llvm/llvm-project/pull/78976