[clang] [CIR] Upstream CastOp and scalar conversions (PR #130690)

[Morris Hafner via cfe-commits]

================
@@ -36,6 +36,18 @@ class ScalarExprEmitter : public StmtVisitor<ScalarExprEmitter, mlir::Value> {
                     bool ira = false)
       : cgf(cgf), builder(builder), ignoreResultAssign(ira) {}
 
+  //===--------------------------------------------------------------------===//
+  //                               Utilities
+  //===--------------------------------------------------------------------===//
+
+  bool TestAndClearIgnoreResultAssign() {
----------------
mmha wrote:

I noticed that the underlying variable is never read from, making this dead code. I removed it.

https://github.com/llvm/llvm-project/pull/130690