llvm-project

9a3d4490 - [Flang][Driver]Implemented the support for option -f[no-]optimize-sibling-calls in Flang (#216650)

[Flang][Driver]Implemented the support for option -f[no-]optimize-sibling-calls in Flang (#216650) Added support for -foptimize-sibling-calls and -fno-optimize-sibling-calls in Flang. - Sibling call optimization is on by default and the driver pass the option `-f[no-]optimize-sibling-calls` to flang -fc1. - When `-fno-optimize-sibling-calls` flag is passed, it sets boolen `DisableTailCalls` and this results in adding the LLVM IR attribute `"disable-tail-calls"="true"` which disables sibling call optimization.