[clang] [llvm] Support for assume directive : Parse & AST modules (PR #97535)

[via llvm-commits]

SunilKuravinakop wrote:

In clang/lib/Sema/SemaOpenMP.cpp I have retained the marking of the inner regions of the associated statements with AssumeAttr. This will make the work in Codegen easier. 

https://github.com/llvm/llvm-project/pull/97535