[llvm] [AMDGPU] Defaults for missing dimensions in SYCL required wg size (PR #68872)

[Matt Arsenault via llvm-commits]

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@@ -317,10 +317,38 @@ static bool processUse(CallInst *CI, bool IsV5OrAbove) {
   return MadeChange;
 }
 
+// SYCL allows required work-group size attribute to be partially specified
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arsenm wrote:

First of all, why would this happen? I would expect all producers of this to agree on one consistent format (which we should also add to the LangRef).

Second, a random backend pass shouldn't be going out of its way to canonicalize metadata.

https://github.com/llvm/llvm-project/pull/68872