[llvm] [mlir] [mlir][EmitC] Add MathToEmitC pass for math function lowering to EmitC (PR #113799)

[Tomer Solomon via llvm-commits]

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@@ -780,6 +780,23 @@ def ConvertMathToSPIRV : Pass<"convert-math-to-spirv"> {
   let dependentDialects = ["spirv::SPIRVDialect"];
 }
 
+//===----------------------------------------------------------------------===//
+// MathToEmitC
+//===----------------------------------------------------------------------===//
+
+def ConvertMathToEmitC  : Pass<"convert-math-to-emitc", "ModuleOp"> {
+  let summary = "Convert some Math operations to EmitC Call_opaque";
+  let description = [{
+    This pass converts supported Math ops to call_opaque calls to compiler generated
+    functions implementing these operations in software.
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recursion-man wrote:

I changed to what you suggested. 
We might add new targets as suggested in [this thread](https://github.com/llvm/llvm-project/pull/113799#discussion_r1820643325)

https://github.com/llvm/llvm-project/pull/113799