[clang] [llvm] [Sanitizer] Make sanitizer passes idempotent (PR #99439)

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

> I remain concerned that newly developed instrumentations may require this special property. Is it useful to restrict this to HIP programs, at least before we gain more experience to comfortably apply this to other configurations?
> 
> I'm also worried that this change could mask potential pass pipeline issues arising from duplicate instrumentations.

ClIgnoreRedundantInstrumentation is false by default.


https://github.com/llvm/llvm-project/pull/99439