Merge pull request #21436 from jrose-apple/revert-5.0-right-on-target

[5.0] Revert "[Serialization] Use full target architectures for swiftmodule files"

Author: shahmishal

lib/Serialization/SerializedModuleLoader.cpp

@@ -128,23 +128,6 @@ static void addDiagnosticInfoForArchitectureMismatch(ASTContext &ctx,
                      archName, foundArchs);
 }
 
-static std::pair<llvm::SmallString<16>, llvm::SmallString<16>>
-getArchSpecificModuleFileNames(StringRef archName) {
-  llvm::SmallString<16> archFile, archDocFile;
-
-  if (!archName.empty()) {
-    archFile += archName;
-    archFile += '.';
-    archFile += file_types::getExtension(file_types::TY_SwiftModuleFile);
-
-    archDocFile += archName;
-    archDocFile += '.';
-    archDocFile += file_types::getExtension(file_types::TY_SwiftModuleDocFile);
-  }
-
-  return {archFile, archDocFile};
-}
-
 bool
 SerializedModuleLoaderBase::findModule(AccessPathElem moduleID,
            std::unique_ptr<llvm::MemoryBuffer> *moduleBuffer,
@@ -160,19 +143,19 @@ SerializedModuleLoaderBase::findModule(AccessPathElem moduleID,
   moduleDocFilename +=
       file_types::getExtension(file_types::TY_SwiftModuleDocFile);
 
-  StringRef archName = Ctx.LangOpts.Target.getArchName();
-  auto archFileNames = getArchSpecificModuleFileNames(archName);
+  // FIXME: Which name should we be using here? Do we care about CPU subtypes?
+  // FIXME: At the very least, don't hardcode "arch".
+  llvm::SmallString<16> archName{
+      Ctx.LangOpts.getPlatformConditionValue(PlatformConditionKind::Arch)};
+  llvm::SmallString<16> archFile{archName};
+  llvm::SmallString<16> archDocFile{archName};
+  if (!archFile.empty()) {
+    archFile += '.';
+    archFile += file_types::getExtension(file_types::TY_SwiftModuleFile);
 
-  // FIXME: We used to use "major architecture" names for these files---the
-  // names checked in "#if arch(...)". Fall back to that name in the one case
-  // where it's different from what Swift 4.2 supported: 32-bit ARM platforms.
-  // We should be able to drop this once there's an Xcode that supports the
-  // new names.
-  StringRef alternateArchName;
-  if (Ctx.LangOpts.Target.getArch() == llvm::Triple::ArchType::arm)
-    alternateArchName = "arm";
-  auto alternateArchFileNames =
-      getArchSpecificModuleFileNames(alternateArchName);
+    archDocFile += '.';
+    archDocFile += file_types::getExtension(file_types::TY_SwiftModuleDocFile);
+  }
 
   llvm::SmallString<128> scratch;
   llvm::SmallString<128> currPath;
@@ -186,19 +169,10 @@ SerializedModuleLoaderBase::findModule(AccessPathElem moduleID,
       currPath = path;
       llvm::sys::path::append(currPath, moduleFilename.str());
       err = openModuleFiles(currPath,
-                            archFileNames.first, archFileNames.second,
+                            archFile.str(), archDocFile.str(),
                             moduleBuffer, moduleDocBuffer,
                             scratch);
 
-      if (err == std::errc::no_such_file_or_directory &&
-          !alternateArchName.empty()) {
-        err = openModuleFiles(currPath,
-                              alternateArchFileNames.first,
-                              alternateArchFileNames.second,
-                              moduleBuffer, moduleDocBuffer,
-                              scratch);
-      }
-
       if (err == std::errc::no_such_file_or_directory) {
         addDiagnosticInfoForArchitectureMismatch(
             Ctx, moduleID.second, moduleName, archName, currPath);
@@ -223,18 +197,9 @@ SerializedModuleLoaderBase::findModule(AccessPathElem moduleID,
       }
 
       llvm::sys::path::append(currPath, "Modules", moduleFilename.str());
-      auto err = openModuleFiles(currPath,
-                                 archFileNames.first, archFileNames.second,
+      auto err = openModuleFiles(currPath, archFile.str(), archDocFile.str(),
                                  moduleBuffer, moduleDocBuffer, scratch);
 
-      if (err == std::errc::no_such_file_or_directory &&
-          !alternateArchName.empty()) {
-        err = openModuleFiles(currPath,
-                              alternateArchFileNames.first,
-                              alternateArchFileNames.second,
-                              moduleBuffer, moduleDocBuffer, scratch);
-      }
-
       if (err == std::errc::no_such_file_or_directory) {
         addDiagnosticInfoForArchitectureMismatch(
             Ctx, moduleID.second, moduleName, archName, currPath);

test/Serialization/load-arch-fallback-framework.swift

@@ -569,6 +569,8 @@ elif platform.system() == 'Linux':
 if 'swift_interpreter' in config.available_features:
     config.available_features.add('swift-remoteast-test')
 
+config.target_swiftmodule_name = "unknown.swiftmodule"
+config.target_swiftdoc_name = "unknown.swiftdoc"
 config.target_runtime = "unknown"
 
 swift_reflection_test_name = 'swift-reflection-test' + config.variant_suffix
@@ -607,6 +609,8 @@ def use_interpreter_for_simple_runs():
 
 if run_vendor == 'apple':
     config.available_features.add('objc_interop')
+    config.target_swiftmodule_name = run_cpu + ".swiftmodule"
+    config.target_swiftdoc_name = run_cpu + ".swiftdoc"
     config.target_object_format = "macho"
     config.target_dylib_extension = "dylib"
     config.target_codesign = "codesign -f -s -"
@@ -642,6 +646,15 @@ if run_vendor == 'apple':
            lit_config.note('Testing watchOS ' + config.variant_triple)
            xcrun_sdk_name = "watchos"
 
+       if run_cpu == "armv7" or run_cpu == "armv7s" or run_cpu == "armv7k":
+           config.target_swiftmodule_name = "arm.swiftmodule"
+           config.target_swiftdoc_name = "arm.swiftdoc"
+       elif run_cpu == "arm64":
+           config.target_swiftmodule_name = "arm64.swiftmodule"
+           config.target_swiftdoc_name = "arm64.swiftdoc"
+       else:
+           lit_config.fatal("Unknown CPU '%s'" % run_cpu)
+
        config.target_cc_options = (
            "-arch %s -m%s-version-min=%s %s" %
            (run_cpu, run_os, run_vers, clang_mcp_opt))
@@ -796,6 +809,8 @@ elif run_os in ['linux-gnu', 'linux-gnueabihf', 'freebsd', 'windows-cygnus', 'wi
       config.target_object_format = "elf"
       config.target_dylib_extension = "so"
       config.target_sdk_name = "linux"
+    config.target_swiftmodule_name = run_cpu + ".swiftmodule"
+    config.target_swiftdoc_name = run_cpu + ".swiftdoc"
     config.target_runtime = "native"
     config.target_swift_autolink_extract = inferSwiftBinary("swift-autolink-extract")
     config.target_build_swift = (
@@ -1255,8 +1270,8 @@ else:
 config.substitutions.insert(0, ('%platform-module-dir', platform_module_dir))
 config.substitutions.insert(0, ('%platform-sdk-overlay-dir', platform_sdk_overlay_dir))
 
-config.substitutions.append(('%target-swiftmodule-name', run_cpu + '.swiftmodule'))
-config.substitutions.append(('%target-swiftdoc-name', run_cpu + '.swiftdoc'))
+config.substitutions.append(('%target-swiftmodule-name', config.target_swiftmodule_name))
+config.substitutions.append(('%target-swiftdoc-name', config.target_swiftdoc_name))
 
 config.substitutions.append(('%target-object-format', config.target_object_format))
 config.substitutions.append(('%target-dylib-extension', config.target_dylib_extension))