[clang] [CIR] Split side_effect into memory effects, nounwind, and willreturn (PR #223890)

[Andy Kaylor via cfe-commits]

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@@ -46,14 +46,17 @@ def CIR_Dialect : Dialect {
     static llvm::StringRef getCalleeAttrName() { return "callee"; }
     static llvm::StringRef getNoThrowAttrName() { return "nothrow"; }
     static llvm::StringRef getNoReturnAttrName() { return "noreturn"; }
-    static llvm::StringRef getSideEffectAttrName() { return "side_effect"; }
+    static llvm::StringRef getMemoryEffectsAttrName() {
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andykaylor wrote:

Not wrapping on 80 columns here would be more consistent with the surrounding style.

https://github.com/llvm/llvm-project/pull/223890