[PATCH] D147561: [clang] don't serialize MODULE_DIRECTORY with ModuleFileHomeIsCwd

[Richard Howell via Phabricator via cfe-commits]

rmaz created this revision.
Herald added a project: All.
rmaz requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

Fix a bug in the MODULE_DIRECTORY serialization logic
that would cause MODULE_DIRECTORY to be serialized when
`-fmodule-file-home-is-cwd` is specified.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147561

Files:
  clang/lib/Serialization/ASTWriter.cpp
  clang/test/Modules/module-file-home-is-cwd.m


Index: clang/test/Modules/module-file-home-is-cwd.m
===================================================================
--- clang/test/Modules/module-file-home-is-cwd.m
+++ clang/test/Modules/module-file-home-is-cwd.m
@@ -5,11 +5,12 @@
 // RUN:     -fmodules-embed-all-files %S/Inputs/normal-module-map/module.map \
 // RUN:     -o %t/mod.pcm
 // RUN: llvm-bcanalyzer --dump --disable-histogram %t/mod.pcm | FileCheck %s
+// RUN: llvm-bcanalyzer --dump --disable-histogram %t/mod.pcm | FileCheck %s --check-prefix=INPUT
 
-// CHECK: <INPUT_FILE {{.*}}/> blob data = 'Inputs{{/|\\}}normal-module-map{{/|\\}}module.map'
-// CHECK: <INPUT_FILE {{.*}}/> blob data = 'Inputs{{/|\\}}normal-module-map{{/|\\}}a2.h'
-// CHECK: <INPUT_FILE {{.*}}/> blob data = 'Inputs{{/|\\}}normal-module-map{{/|\\}}a1.h'
 // CHECK-NOT: MODULE_DIRECTORY
+// INPUT: <INPUT_FILE {{.*}}/> blob data = 'Inputs{{/|\\}}normal-module-map{{/|\\}}module.map'
+// INPUT: <INPUT_FILE {{.*}}/> blob data = 'Inputs{{/|\\}}normal-module-map{{/|\\}}a2.h'
+// INPUT: <INPUT_FILE {{.*}}/> blob data = 'Inputs{{/|\\}}normal-module-map{{/|\\}}a1.h'
 
 @import libA;
 
Index: clang/lib/Serialization/ASTWriter.cpp
===================================================================
--- clang/lib/Serialization/ASTWriter.cpp
+++ clang/lib/Serialization/ASTWriter.cpp
@@ -1288,11 +1288,11 @@
     // If the home of the module is the current working directory, then we
     // want to pick up the cwd of the build process loading the module, not
     // our cwd, when we load this module.
-    if (!(PP.getHeaderSearchInfo()
+    if (!PP.getHeaderSearchInfo().getHeaderSearchOpts().ModuleFileHomeIsCwd &&
+        (!PP.getHeaderSearchInfo()
               .getHeaderSearchOpts()
               .ModuleMapFileHomeIsCwd ||
-          PP.getHeaderSearchInfo().getHeaderSearchOpts().ModuleFileHomeIsCwd) ||
-        WritingModule->Directory->getName() != StringRef(".")) {
+         WritingModule->Directory->getName() != StringRef("."))) {
       // Module directory.
       auto Abbrev = std::make_shared<BitCodeAbbrev>();
       Abbrev->Add(BitCodeAbbrevOp(MODULE_DIRECTORY));


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