[llvm] [AMDGPU] Be less optimistic when allocating module scope lds (PR #161464)

[Jon Chesterfield via llvm-commits]

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@@ -608,6 +608,8 @@ class AMDGPULowerModuleLDS {
             ? LDSToKernelsThatNeedToAccessItIndirectly[HybridModuleRoot]
             : EmptySet;
 
+    const auto HybridModuleRootKernelsSize = HybridModuleRootKernels.size();
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JonChesterfield wrote:

For ::size()? It's going to be some variant of integer.

I suppose it could be DenseSet::SizeType but that doesn't really say more than auto did.

Regardless, you can have whatever string of letters you prefer here. Or we can call the function repeatedly. Or actually implement set_is_equal in the ADT header which is what I looked for first.

https://github.com/llvm/llvm-project/pull/161464