[clang] [CIR] Add SCF ResumeOp (PR #170042)

[Amr Hesham via cfe-commits]

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@@ -898,6 +898,36 @@ def CIR_ContinueOp : CIR_Op<"continue", [Terminator]> {
   let hasLLVMLowering = false;
 }
 
+//===----------------------------------------------------------------------===//
+// Resume
+//===----------------------------------------------------------------------===//
+
+def CIR_SCFResumeOp : CIR_Op<"scf.resume", [
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AmrDeveloper wrote:

IMO, `unwind_resume` or `resume` are more clear than `rethrow`, usually I think of throw/rethrow as exception that can be catched or terminate the program, but here it's like redirect back 🤔, maybe something like `cir.fianlly`

https://github.com/llvm/llvm-project/pull/170042