[llvm] [SPIR-V] Add pre-headers to loops. (PR #75844)

[Natalie Chouinard via llvm-commits]

Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>
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In-Reply-To: <llvm.org/llvm/llvm-project/pull/75844 at github.com>


https://github.com/sudonatalie edited https://github.com/llvm/llvm-project/pull/75844