[llvm] [SandboxIR] Implement CmpInst, FCmpInst, and ICmpInst (PR #106301)

[via llvm-commits]

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@@ -2974,6 +2989,187 @@ class PHINode final : public SingleLLVMInstructionImpl<llvm::PHINode> {
   //                         uint32_t ToIdx = 0)
 };
 
+// Wraps a static function that takes a single Predicate parameter
+// LLVMValType should be the type of the wrapped class
+#define WRAP_STATIC_PREDICATE(FunctionName)                                    \
+  static auto FunctionName(Predicate P) { return LLVMValType::FunctionName(P); }
+// Wraps a member function that takes no parameters
+// LLVMValType should be the type of the wrapped class
+#define WRAP_MEMBER(FunctionName)                                              \
+  auto FunctionName() { return cast<LLVMValType>(Val)->FunctionName(); }
+// Wraps both--a common idiom in the CmpInst classes
+#define WRAP_BOTH(FunctionName)                                                \
+  WRAP_STATIC_PREDICATE(FunctionName)                                          \
+  WRAP_MEMBER(FunctionName)
+
+class CmpInst : public Instruction {
+protected:
+  using LLVMValType = llvm::CmpInst;
+  /// Use Context::createCmpInst(). Don't call the
+  /// constructor directly.
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vporpo wrote:

nit: Looks like the comment should fit in a single line.

https://github.com/llvm/llvm-project/pull/106301