[PATCH] D48685: [PCH+Modules] Load -fmodule-map-file content before including PCHs
Bruno Cardoso Lopes via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Wed Jun 27 16:45:30 PDT 2018
bruno created this revision.
bruno added reviewers: rsmith, benlangmuir.
Consider:
1. Generate PCH with -fmodules and -fmodule-map-file
2. Use PCH with -fmodules and the same -fmodule-map-file
If we don't load -fmodule-map-file content before including PCHs, the modules that are dependencies in PCHs cannot get loaded, since there's no matching module map file when reading back the AST.
rdar://problem/40852867
https://reviews.llvm.org/D48685
Files:
lib/Frontend/FrontendAction.cpp
test/Modules/module-imported-by-pch-with-modulemap.m
Index: test/Modules/module-imported-by-pch-with-modulemap.m
===================================================================
--- /dev/null
+++ test/Modules/module-imported-by-pch-with-modulemap.m
@@ -0,0 +1,16 @@
+// RUN: rm -rf %t.dst %t.cache
+// RUN: mkdir -p %t.dst/folder-with-modulemap %t.dst/pch-folder
+// RUN: echo '#import "folder-with-modulemap/included.h"' > %t.dst/header.h
+// RUN: echo 'extern int MyModuleVersion;' > %t.dst/folder-with-modulemap/MyModule.h
+// RUN: echo '@import MyModule;' > %t.dst/folder-with-modulemap/included.h
+// RUN: echo 'module MyModule { header "MyModule.h" }' > %t.dst/folder-with-modulemap/MyModule.modulemap
+
+// RUN: %clang_cc1 -emit-pch -o %t.dst/pch-folder/header.pch -fmodule-map-file=%t.dst/folder-with-modulemap/MyModule.modulemap -x objective-c-header -fmodules-cache-path=%t.cache -fmodules -fimplicit-module-maps %t.dst/header.h
+// RUN: %clang_cc1 -fsyntax-only -fmodule-map-file=%t.dst/folder-with-modulemap/MyModule.modulemap -fmodules-cache-path=%t.cache -fmodules -fimplicit-module-maps %s -include-pch %t.dst/pch-folder/header.pch -verify
+
+// expected-no-diagnostics
+
+void test() {
+ (void)MyModuleVersion; // should be found by implicit import
+}
+
Index: lib/Frontend/FrontendAction.cpp
===================================================================
--- lib/Frontend/FrontendAction.cpp
+++ lib/Frontend/FrontendAction.cpp
@@ -766,6 +766,22 @@
if (!BeginSourceFileAction(CI))
goto failure;
+ // If we were asked to load any module map files, do so now.
+ for (const auto &Filename : CI.getFrontendOpts().ModuleMapFiles) {
+ if (auto *File = CI.getFileManager().getFile(Filename))
+ CI.getPreprocessor().getHeaderSearchInfo().loadModuleMapFile(
+ File, /*IsSystem*/false);
+ else
+ CI.getDiagnostics().Report(diag::err_module_map_not_found) << Filename;
+ }
+
+ // Add a module declaration scope so that modules from -fmodule-map-file
+ // arguments may shadow modules found implicitly in search paths.
+ CI.getPreprocessor()
+ .getHeaderSearchInfo()
+ .getModuleMap()
+ .finishModuleDeclarationScope();
+
// Create the AST context and consumer unless this is a preprocessor only
// action.
if (!usesPreprocessorOnly()) {
@@ -855,22 +871,6 @@
"doesn't support modules");
}
- // If we were asked to load any module map files, do so now.
- for (const auto &Filename : CI.getFrontendOpts().ModuleMapFiles) {
- if (auto *File = CI.getFileManager().getFile(Filename))
- CI.getPreprocessor().getHeaderSearchInfo().loadModuleMapFile(
- File, /*IsSystem*/false);
- else
- CI.getDiagnostics().Report(diag::err_module_map_not_found) << Filename;
- }
-
- // Add a module declaration scope so that modules from -fmodule-map-file
- // arguments may shadow modules found implicitly in search paths.
- CI.getPreprocessor()
- .getHeaderSearchInfo()
- .getModuleMap()
- .finishModuleDeclarationScope();
-
// If we were asked to load any module files, do so now.
for (const auto &ModuleFile : CI.getFrontendOpts().ModuleFiles)
if (!CI.loadModuleFile(ModuleFile))
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