Add target variant to -print-target-info

Author: beccadax

lib/FrontendTool/FrontendTool.cpp

@@ -1894,39 +1894,54 @@ createJSONFixItDiagnosticConsumerIfNeeded(
   });
 }
 
-/// Print information about the selected target in JSON.
-static void printTargetInfo(const CompilerInvocation &invocation,
+/// Print information about the target triple in JSON.
+static void printTripleInfo(const llvm::Triple &triple,
                             llvm::raw_ostream &out) {
   out << "{\n";
 
-  // Target information.
-  auto &langOpts = invocation.getLangOptions();
-  out << "  \"target\": {\n";
-
   out << "    \"triple\": \"";
-  out.write_escaped(langOpts.Target.getTriple());
+  out.write_escaped(triple.getTriple());
   out << "\",\n";
 
   out << "    \"unversionedTriple\": \"";
-  out.write_escaped(getUnversionedTriple(langOpts.Target).getTriple());
+  out.write_escaped(getUnversionedTriple(triple).getTriple());
   out << "\",\n";
 
   out << "    \"moduleTriple\": \"";
-  out.write_escaped(getTargetSpecificModuleTriple(langOpts.Target).getTriple());
+  out.write_escaped(getTargetSpecificModuleTriple(triple).getTriple());
   out << "\",\n";
 
   if (auto runtimeVersion = getSwiftRuntimeCompatibilityVersionForTarget(
-          langOpts.Target)) {
+          triple)) {
     out << "    \"swiftRuntimeCompatibilityVersion\": \"";
     out.write_escaped(runtimeVersion->getAsString());
     out << "\",\n";
   }
 
   out << "    \"librariesRequireRPath\": "
-      << (tripleRequiresRPathForSwiftInOS(langOpts.Target) ? "true" : "false")
+      << (tripleRequiresRPathForSwiftInOS(triple) ? "true" : "false")
       << "\n";
 
-  out << "  },\n";
+  out << "  }";
+
+}
+
+/// Print information about the selected target in JSON.
+static void printTargetInfo(const CompilerInvocation &invocation,
+                            llvm::raw_ostream &out) {
+  out << "{\n";
+
+  // Target triple and target variant triple.
+  auto &langOpts = invocation.getLangOptions();
+  out << "  \"target\": ";
+  printTripleInfo(langOpts.Target, out);
+  out << ",\n";
+
+  if (auto &variant = langOpts.TargetVariant) {
+    out << "  \"targetVariant\": ";
+    printTripleInfo(*variant, out);
+    out << ",\n";
+  }
 
   // Various paths.
   auto &searchOpts = invocation.getSearchPathOptions();

test/Driver/print_target_info.swift

@@ -4,6 +4,9 @@
 // RUN: %swift_driver -print-target-info -target x86_64-unknown-linux | %FileCheck -check-prefix CHECK-LINUX %s
 // RUN: %target-swift-frontend -print-target-info -target x86_64-unknown-linux | %FileCheck -check-prefix CHECK-LINUX %s
 
+// RUN: %swift_driver -print-target-info -target x86_64-apple-macosx10.15 -target-variant x86_64-apple-ios13-macabi | %FileCheck -check-prefix CHECK-ZIPPERED %s
+// RUN: %target-swift-frontend -print-target-info -target x86_64-apple-macosx10.15 -target-variant x86_64-apple-ios13-macabi | %FileCheck -check-prefix CHECK-ZIPPERED %s
+
 // CHECK-IOS:   "target": {
 // CHECK-IOS:     "triple": "arm64-apple-ios12.0",
 // CHECK-IOS:     "unversionedTriple": "arm64-apple-ios",
@@ -12,6 +15,8 @@
 // CHECK-IOS:     "librariesRequireRPath": true
 // CHECK-IOS:   }
 
+// CHECK-IOS-NOT: "targetVariant":
+
 // CHECK-IOS:   "paths": {
 // CHECK-IOS:     "runtimeLibraryPaths": [
 // CHECK-IOS:     ],
@@ -26,3 +31,22 @@
 // CHECK-LINUX:     "moduleTriple": "x86_64-unknown-linux",
 // CHECK-LINUX:     "librariesRequireRPath": false
 // CHECK-LINUX:   }
+
+// CHECK-LINUX-NOT: "targetVariant":
+
+
+// CHECK-ZIPPERED: "target": {
+// CHECK-ZIPPERED:   "triple": "x86_64-apple-macosx10.15"
+// CHECK-ZIPPERED:   "unversionedTriple": "x86_64-apple-macosx"
+// CHECK-ZIPPERED:   "moduleTriple": "x86_64-apple-macos"
+// CHECK-ZIPPERED:   "swiftRuntimeCompatibilityVersion": "5.1"
+// CHECK-ZIPPERED:   "librariesRequireRPath": false
+// CHECK-ZIPPERED: }
+
+// CHECK-ZIPPERED: "targetVariant": {
+// CHECK-ZIPPERED:   "triple": "x86_64-apple-ios13-macabi"
+// CHECK-ZIPPERED:   "unversionedTriple": "x86_64-apple-ios-macabi"
+// CHECK-ZIPPERED:   "moduleTriple": "x86_64-apple-ios-macabi"
+// CHECK-ZIPPERED:   "swiftRuntimeCompatibilityVersion": "5.1"
+// CHECK-ZIPPERED:   "librariesRequireRPath": false
+// CHECK-ZIPPERED: }