Pass -enable-cmo-everything to frontend jobs.

Resolves rdar://128401284.

Author: tshortli

Sources/SwiftDriver/Jobs/CompileJob.swift

@@ -296,7 +296,8 @@ extension Driver {
     if Driver.canDoCrossModuleOptimization(parsedOptions: &parsedOptions) &&
        // For historical reasons, -cross-module-optimization turns on "aggressive" CMO
        // which is different from "default" CMO.
-       !parsedOptions.hasArgument(.CrossModuleOptimization) {
+       !parsedOptions.hasArgument(.CrossModuleOptimization) &&
+       !parsedOptions.hasArgument(.EnableCMOEverything) {
       assert(!emitModuleSeparately, "Cannot emit module separately with cross-module-optimization")
       commandLine.appendFlag("-enable-default-cmo")
     }
@@ -370,6 +371,7 @@ extension Driver {
 
     try commandLine.appendLast(.trackSystemDependencies, from: &parsedOptions)
     try commandLine.appendLast(.CrossModuleOptimization, from: &parsedOptions)
+    try commandLine.appendLast(.EnableCMOEverything, from: &parsedOptions)
     try commandLine.appendLast(.ExperimentalPerformanceAnnotations, from: &parsedOptions)
 
     try commandLine.appendLast(.runtimeCompatibilityVersion, from: &parsedOptions)

Tests/SwiftDriverTests/SwiftDriverTests.swift

@@ -3643,6 +3643,24 @@ final class SwiftDriverTests: XCTestCase {
       XCTAssertTrue(plannedJobs[0].commandLine.contains(.flag("-enable-default-cmo")))
     }
 
+    do {
+      // -cross-module-optimization should supersede -enable-default-cmo
+      var driver = try Driver(args: ["swiftc", "foo.swift", "bar.swift", "-module-name", "Test", "-emit-module-path", rebase("Test.swiftmodule", at: root), "-c", "-o", rebase("test.o", at: root), "-wmo", "-O", "-cross-module-optimization"])
+      let plannedJobs = try driver.planBuild()
+      XCTAssertEqual(plannedJobs.count, 1)
+      XCTAssertFalse(plannedJobs[0].commandLine.contains(.flag("-enable-default-cmo")))
+      XCTAssertTrue(plannedJobs[0].commandLine.contains(.flag("-cross-module-optimization")))
+    }
+
+    do {
+      // -enable-cmo-everything should supersede -enable-default-cmo
+      var driver = try Driver(args: ["swiftc", "foo.swift", "bar.swift", "-module-name", "Test", "-emit-module-path", rebase("Test.swiftmodule", at: root), "-c", "-o", rebase("test.o", at: root), "-wmo", "-O", "-enable-cmo-everything"])
+      let plannedJobs = try driver.planBuild()
+      XCTAssertEqual(plannedJobs.count, 1)
+      XCTAssertFalse(plannedJobs[0].commandLine.contains(.flag("-enable-default-cmo")))
+      XCTAssertTrue(plannedJobs[0].commandLine.contains(.flag("-enable-cmo-everything")))
+    }
+
     do {
       // library-evolution builds can emit the module in a separate job.
       var driver = try Driver(args: ["swiftc", "foo.swift", "bar.swift", "-module-name", "Test", "-emit-module-path", rebase("Test.swiftmodule", at: root), "-c", "-o", rebase("test.o", at: root), "-wmo", "-O", "-enable-library-evolution" ])
@@ -3671,7 +3689,7 @@ final class SwiftDriverTests: XCTestCase {
     }
 
     do {
-      // Don't use emit-module-separetely as a linker.
+      // Don't use emit-module-separately as a linker.
       var driver = try Driver(args: ["swiftc", "foo.sil", "bar.sil", "-module-name", "Test", "-emit-module-path", "/foo/bar/Test.swiftmodule", "-emit-library", "-target", "x86_64-apple-macosx10.15", "-wmo", "-emit-module-separately-wmo"],
                                env: envVars)
       let plannedJobs = try driver.planBuild()