[llvm] [OPT] Search whole BB for convergence token. (PR #112728)

[Sameer Sahasrabuddhe via llvm-commits]

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@@ -180,6 +180,19 @@ namespace {
     }
   };
 
+  IntrinsicInst *getConevrgenceEntryIfAny(BasicBlock &BB) {
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ssahasra wrote:

The spelling of "convergence" needs to be fixed. Also, "IfAny" is not necessary as a suffix. By convention, most functions simply return a nullptr if none matches.

Also, function should be declared `static`, resulting in internal linkage since the callers are all in this same file.

https://github.com/llvm/llvm-project/pull/112728