[clang] [CIR] Upstream lowering of conditional operators to TernaryOp (PR #138156)

[Andy Kaylor via cfe-commits]

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@@ -108,6 +108,152 @@ class CIRGenFunction : public CIRGenTypeCache {
 
   mlir::MLIRContext &getMLIRContext() { return cgm.getMLIRContext(); }
 
+  // ---------------------
+  // Opaque value handling
+  // ---------------------
+
+  /// Keeps track of the current set of opaque value expressions.
+  llvm::DenseMap<const OpaqueValueExpr *, LValue> opaqueLValues;
+  llvm::DenseMap<const OpaqueValueExpr *, RValue> opaqueRValues;
+
+  // This keeps track of the associated size for each VLA type.
+  // We track this by the size expression rather than the type itself because
+  // in certain situations, like a const qualifier applied to an VLA typedef,
+  // multiple VLA types can share the same size expression.
+  // FIXME: Maybe this could be a stack of maps that is pushed/popped as we
+  // enter/leave scopes.
+  llvm::DenseMap<const Expr *, mlir::Value> vlaSizeMap;
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andykaylor wrote:

Is this used in this PR?

https://github.com/llvm/llvm-project/pull/138156