add support to enable simd for mac under the native march

Signed-off-by: Alexandre Eichenberger <[email protected]>

Author: AlexandreEichenberger

src/Compiler/CompilerOptions.cpp

@@ -1417,11 +1417,6 @@ void initCompilerConfig() {
     setLLVMOption(getLLVMOption() + " --enable-unsafe-fp-math");
   }
 
-#if 0
-  if (march == "z17")
-    march = "arch15";
-#endif
-
   if (march == "native") {
     march = std::string(llvm::sys::getHostCPUName());
     if (VerboseOutput)

src/Dialect/Mlir/VectorMachineSupport.cpp

@@ -48,8 +48,10 @@ namespace onnx_mlir {
     else
       // Default seems to be SSE
       globalVectorMachineSupport = new SSE42x86VectorMachineSupport();
-    // Arm uses arch
-  } else if (arch.compare("aarch64") == 0 || arch.compare("arm64") == 0) {
+    // Arm uses arch, and arch=native returns apple-mXXX.
+  } else if (arch.compare("aarch64") == 0 || arch.compare("arm64") == 0 ||
+             arch.compare("apple-m1") == 0 || arch.compare("apple-m2") == 0 ||
+             arch.compare("apple-m3") == 0 || arch.compare("apple-m4") == 0) {
     // Arm arch
     globalVectorMachineSupport = new NeonVectorMachineSupport();
   } else {