[clang] [CIR] Upstream initial support for CIR flattening (PR #130648)

[Bruno Cardoso Lopes via cfe-commits]

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@@ -428,6 +428,46 @@ def ScopeOp : CIR_Op<"scope", [
   ];
 }
 
+//===----------------------------------------------------------------------===//
+// BrOp
+//===----------------------------------------------------------------------===//
+
+def BrOp : CIR_Op<"br",
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bcardosolopes wrote:

It's just a coincidence (I didn't look at LLVMIR when I first named this). The value IMO is matching a terse mnemonic - I'd vote to keep BrOp for consistency (versus BranchOp/"cir.branch").

https://github.com/llvm/llvm-project/pull/130648