[MLIR][LLVMIR] Translation: honor target-features fn attribute

Author: bcardosolopes

mlir/lib/Target/LLVMIR/ModuleTranslation.cpp

@@ -1606,6 +1606,8 @@ static void convertFunctionAttributes(LLVMFuncOp func,
     llvmFunc->addFnAttr(llvm::Attribute::NoUnwind);
   if (func.getWillReturnAttr())
     llvmFunc->addFnAttr(llvm::Attribute::WillReturn);
+  if (TargetFeaturesAttr targetFeatAttr = func.getTargetFeaturesAttr())
+    llvmFunc->addFnAttr("target-features", targetFeatAttr.getFeaturesString());
   convertFunctionMemoryAttributes(func, llvmFunc);
 }
 

mlir/test/Target/LLVMIR/llvmir.mlir

@@ -2367,6 +2367,18 @@ llvm.func @readwrite_func() attributes {
 
 // -----
 
+//
+// target-features attribute.
+//
+
+// CHECK-LABEL: @tf
+// CHECK-SAME: #[[TargetFeat:.*]]
+llvm.func @tf(!llvm.ptr) attributes {target_features = #llvm.target_features<["+fix-cortex-a53-835769", "+fp-armv8", "+neon", "+outline-atomics", "+v8a"]>}
+
+// CHECK: attributes #[[TargetFeat]] = { "target-features"="+fix-cortex-a53-835769,+fp-armv8,+neon,+outline-atomics,+v8a" }
+
+// -----
+
 //
 // arm_streaming attribute.
 //