[clang] [CIR] Upstream support for switch statements case kinds (PR #138003)

[Andy Kaylor via cfe-commits]

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@@ -112,24 +141,31 @@ int sw4(int a) {
 // CIR-NEXT:         }
 // CIR-NEXT:         cir.yield
 // CIR-NEXT:       }
+// CIR-NEXT:       cir.case(default, []) {
+// CIR-NEXT:         %5 = cir.const #cir.int<2> : !s32i
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andykaylor wrote:

Please update this test (throughout the file) to use pattern matching in place of the hard-coded identifiers.

https://github.com/llvm/llvm-project/pull/138003