[clang] [CIR] Upstream support for array new with empty initializer list (PR #178806)

[Andy Kaylor via cfe-commits]

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@@ -197,6 +197,12 @@ class CIRGenBuilderTy : public cir::CIRBaseBuilderTy {
                              mlir::Value src, mlir::Value len) {
     return cir::MemCpyOp::create(*this, loc, dst, src, len);
   }
+
+  cir::MemSetOp createMemSet(mlir::Location loc, mlir::Value dst,
+                             mlir::Value val, mlir::Value len) {
+    val = createIntCast(val, cir::IntType::get(getContext(), 32, true));
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andykaylor wrote:

You're absolutely right. I was thinking of the libc signature when I moved this code over so, I didn't question it being a 32-bit value, but I see that the LLVM dialect operation and the LLVM IR intrinsic both take an 8-bit value. I'll update this.

https://github.com/llvm/llvm-project/pull/178806