4ece50737d
Remove LLVM flag -experimental-assignment-tracking. Assignment tracking is still enabled from Clang with the command line -Xclang -fexperimental-assignment-tracking which tells Clang to ask LLVM to run the pass declare-to-assign. That pass converts conventional debug intrinsics to assignment tracking metadata. With this patch it now also sets a module flag debug-info-assignment-tracking with the value `i1 true` (using the flag conflict rule `Max` since enabling assignment tracking on IR that contains only conventional debug intrinsics should cause no issues). Update the docs and tests too. Reviewed By: CarlosAlbertoEnciso Differential Revision: https://reviews.llvm.org/D142027
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