[clang] [Clang][OpenCL] Mark scalar loads from constant address space invariant (PR #218356)

[Keshav Vinayak Jha via cfe-commits]

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@@ -2248,6 +2248,9 @@ llvm::Value *CodeGenFunction::EmitLoadOfScalar(Address Addr, bool Volatile,
       Addr.withElementType(convertTypeForLoadStore(Ty, Addr.getElementType()));
 
   llvm::LoadInst *Load = Builder.CreateLoad(Addr, Volatile);
+  if (Ty.getAddressSpace() == LangAS::opencl_constant || BaseInfo.isInvariant())
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keshavvinayak01 wrote:

I've moved it around, but I see usage in https://github.com/llvm/llvm-project/blob/0db5329758ea658bb5580408560c6333ed815bbb/clang/lib/CodeGen/CGDebugInfo.cpp#L6317 as well.

https://github.com/llvm/llvm-project/pull/218356