[clang] [CIR] Emit references to constant-initialized const variables as const. (PR #231689)

[Andy Kaylor via cfe-commits]

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@@ -3055,47 +3056,139 @@ Address CIRGenFunction::createDefaultAlignTempAlloca(mlir::Type ty,
   return createTempAlloca(ty, align, loc, name);
 }
 
+/// Given an object of the given canonical type, can we safely copy a
+/// value out of it based on its initializer?
+static bool isConstantEmittableObjectType(QualType type) {
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andykaylor wrote:

Can this be shared with classic codegen somehow? Maybe move it into QualType?

https://github.com/llvm/llvm-project/pull/231689