[clang] [clang][modules] Allow module maps with textual headers to be non-affecting (PR #89441)
Jan Svoboda via cfe-commits
cfe-commits at lists.llvm.org
Wed Apr 24 09:05:09 PDT 2024
https://github.com/jansvoboda11 updated https://github.com/llvm/llvm-project/pull/89441
>From 9165d6086e2570198fba1c333d0c9cb9c09037c7 Mon Sep 17 00:00:00 2001
From: Jan Svoboda <jan_svoboda at apple.com>
Date: Fri, 19 Apr 2024 12:13:06 -0700
Subject: [PATCH 1/8] [clang][modules] Allow module map files with textual
header be non-affecting
---
clang/lib/Serialization/ASTWriter.cpp | 10 ++++---
...e-non-affecting-module-map-files-textual.c | 26 +++++++++++++++++++
2 files changed, 32 insertions(+), 4 deletions(-)
create mode 100644 clang/test/Modules/prune-non-affecting-module-map-files-textual.c
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 8a4b36207c4734..4825c245a4b846 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -187,7 +187,8 @@ GetAffectingModuleMaps(const Preprocessor &PP, Module *RootModule) {
continue;
const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
- if (!HFI || (HFI->isModuleHeader && !HFI->isCompilingModuleHeader))
+ if (!HFI || ((HFI->isModuleHeader || HFI->isTextualModuleHeader) &&
+ !HFI->isCompilingModuleHeader))
continue;
for (const auto &KH : HS.findResolvedModulesForHeader(*File)) {
@@ -2055,11 +2056,12 @@ void ASTWriter::WriteHeaderSearch(const HeaderSearch &HS) {
// Get the file info. Skip emitting this file if we have no information on
// it as a header file (in which case HFI will be null) or if it hasn't
- // changed since it was loaded. Also skip it if it's for a modular header
- // from a different module; in that case, we rely on the module(s)
+ // changed since it was loaded. Also skip it if it's for a non-excluded
+ // header from a different module; in that case, we rely on the module(s)
// containing the header to provide this information.
const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
- if (!HFI || (HFI->isModuleHeader && !HFI->isCompilingModuleHeader))
+ if (!HFI || ((HFI->isModuleHeader || HFI->isTextualModuleHeader) &&
+ !HFI->isCompilingModuleHeader))
continue;
// Massage the file path into an appropriate form.
diff --git a/clang/test/Modules/prune-non-affecting-module-map-files-textual.c b/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
new file mode 100644
index 00000000000000..8f8f00560b1834
--- /dev/null
+++ b/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
@@ -0,0 +1,26 @@
+// This test checks that a module map with a textual header can be marked as
+// non-affecting.
+
+// RUN: rm -rf %t && mkdir %t
+// RUN: split-file %s %t
+
+//--- A.modulemap
+module A { textual header "A.h" }
+//--- B.modulemap
+module B { header "B.h" export * }
+//--- A.h
+typedef int A_int;
+//--- B.h
+#include "A.h"
+typedef A_int B_int;
+
+// RUN: %clang_cc1 -fmodules -emit-module %t/A.modulemap -fmodule-name=A -o %t/A.pcm \
+// RUN: -fmodule-map-file=%t/A.modulemap -fmodule-map-file=%t/B.modulemap
+
+// RUN: %clang_cc1 -fmodules -emit-module %t/B.modulemap -fmodule-name=B -o %t/B0.pcm \
+// RUN: -fmodule-map-file=%t/A.modulemap -fmodule-map-file=%t/B.modulemap -fmodule-file=%t/A.pcm
+
+// RUN: %clang_cc1 -fmodules -emit-module %t/B.modulemap -fmodule-name=B -o %t/B1.pcm \
+// RUN: -fmodule-map-file=%t/B.modulemap -fmodule-file=%t/A.pcm
+
+// RUN: diff %t/B0.pcm %t/B1.pcm
>From 17b1860b25de99f8b2b2e047ef1590b8ede6648b Mon Sep 17 00:00:00 2001
From: Jan Svoboda <jan_svoboda at apple.com>
Date: Mon, 22 Apr 2024 09:28:26 -0700
Subject: [PATCH 2/8] [clang][modules] Mark 'use'd modules as affecting
---
clang/lib/Serialization/ASTWriter.cpp | 2 ++
1 file changed, 2 insertions(+)
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 4825c245a4b846..8c303fa67e3023 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -238,6 +238,8 @@ GetAffectingModuleMaps(const Preprocessor &PP, Module *RootModule) {
CollectIncludingMapsFromAncestors(CurrentModule);
for (const Module *ImportedModule : CurrentModule->Imports)
CollectIncludingMapsFromAncestors(ImportedModule);
+ for (const Module *UsedModule : CurrentModule->DirectUses)
+ CollectIncludingMapsFromAncestors(UsedModule);
for (const Module *UndeclaredModule : CurrentModule->UndeclaredUses)
CollectIncludingMapsFromAncestors(UndeclaredModule);
}
>From 9eeea3f468432ec810a9e09696cf6a527c7db233 Mon Sep 17 00:00:00 2001
From: Jan Svoboda <jan_svoboda at apple.com>
Date: Tue, 23 Apr 2024 07:51:17 -0700
Subject: [PATCH 3/8] [clang][modules] Do consider module maps of included
textual headers affecting
---
clang/lib/Serialization/ASTWriter.cpp | 16 +++++++++-------
...rune-non-affecting-module-map-files-textual.c | 14 ++++----------
2 files changed, 13 insertions(+), 17 deletions(-)
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 8c303fa67e3023..24f5c3ebbc1457 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -187,8 +187,8 @@ GetAffectingModuleMaps(const Preprocessor &PP, Module *RootModule) {
continue;
const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
- if (!HFI || ((HFI->isModuleHeader || HFI->isTextualModuleHeader) &&
- !HFI->isCompilingModuleHeader))
+ if (!HFI || (HFI->isModuleHeader && !HFI->isCompilingModuleHeader) ||
+ (HFI->isTextualModuleHeader && !PP.alreadyIncluded(*File)))
continue;
for (const auto &KH : HS.findResolvedModulesForHeader(*File)) {
@@ -2058,12 +2058,14 @@ void ASTWriter::WriteHeaderSearch(const HeaderSearch &HS) {
// Get the file info. Skip emitting this file if we have no information on
// it as a header file (in which case HFI will be null) or if it hasn't
- // changed since it was loaded. Also skip it if it's for a non-excluded
- // header from a different module; in that case, we rely on the module(s)
- // containing the header to provide this information.
+ // changed since it was loaded. Also skip it if it's for a modular header
+ // from a different module; in that case, we rely on the module(s)
+ // containing the header to provide this information. Also skip it if it's
+ // for a textual header from a different module that has not been included;
+ // in that case, we don't need the information at all.
const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
- if (!HFI || ((HFI->isModuleHeader || HFI->isTextualModuleHeader) &&
- !HFI->isCompilingModuleHeader))
+ if (!HFI || (HFI->isModuleHeader && !HFI->isCompilingModuleHeader) ||
+ (HFI->isTextualModuleHeader && !PP->alreadyIncluded(*File)))
continue;
// Massage the file path into an appropriate form.
diff --git a/clang/test/Modules/prune-non-affecting-module-map-files-textual.c b/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
index 8f8f00560b1834..485e360d72bec1 100644
--- a/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
+++ b/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
@@ -1,5 +1,5 @@
// This test checks that a module map with a textual header can be marked as
-// non-affecting.
+// non-affecting if its header did not get included.
// RUN: rm -rf %t && mkdir %t
// RUN: split-file %s %t
@@ -7,20 +7,14 @@
//--- A.modulemap
module A { textual header "A.h" }
//--- B.modulemap
-module B { header "B.h" export * }
+module B { header "B.h" }
//--- A.h
-typedef int A_int;
//--- B.h
-#include "A.h"
-typedef A_int B_int;
-
-// RUN: %clang_cc1 -fmodules -emit-module %t/A.modulemap -fmodule-name=A -o %t/A.pcm \
-// RUN: -fmodule-map-file=%t/A.modulemap -fmodule-map-file=%t/B.modulemap
// RUN: %clang_cc1 -fmodules -emit-module %t/B.modulemap -fmodule-name=B -o %t/B0.pcm \
-// RUN: -fmodule-map-file=%t/A.modulemap -fmodule-map-file=%t/B.modulemap -fmodule-file=%t/A.pcm
+// RUN: -fmodule-map-file=%t/A.modulemap -fmodule-map-file=%t/B.modulemap
// RUN: %clang_cc1 -fmodules -emit-module %t/B.modulemap -fmodule-name=B -o %t/B1.pcm \
-// RUN: -fmodule-map-file=%t/B.modulemap -fmodule-file=%t/A.pcm
+// RUN: -fmodule-map-file=%t/B.modulemap
// RUN: diff %t/B0.pcm %t/B1.pcm
>From ddc6bf9af7f84123a93ed9bb13138013a73456f9 Mon Sep 17 00:00:00 2001
From: Jan Svoboda <jan_svoboda at apple.com>
Date: Tue, 23 Apr 2024 12:47:22 -0700
Subject: [PATCH 4/8] Reject all non-included headers from that are
!isCompilingModuleHeader, not just textual module headers. Also remove
DirectUses.
---
clang/lib/Serialization/ASTWriter.cpp | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 24f5c3ebbc1457..d10be3fca3194e 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -187,8 +187,8 @@ GetAffectingModuleMaps(const Preprocessor &PP, Module *RootModule) {
continue;
const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
- if (!HFI || (HFI->isModuleHeader && !HFI->isCompilingModuleHeader) ||
- (HFI->isTextualModuleHeader && !PP.alreadyIncluded(*File)))
+ if (!HFI || (!HFI->isCompilingModuleHeader &&
+ (HFI->isModuleHeader || !PP.alreadyIncluded(*File))))
continue;
for (const auto &KH : HS.findResolvedModulesForHeader(*File)) {
@@ -238,8 +238,6 @@ GetAffectingModuleMaps(const Preprocessor &PP, Module *RootModule) {
CollectIncludingMapsFromAncestors(CurrentModule);
for (const Module *ImportedModule : CurrentModule->Imports)
CollectIncludingMapsFromAncestors(ImportedModule);
- for (const Module *UsedModule : CurrentModule->DirectUses)
- CollectIncludingMapsFromAncestors(UsedModule);
for (const Module *UndeclaredModule : CurrentModule->UndeclaredUses)
CollectIncludingMapsFromAncestors(UndeclaredModule);
}
@@ -2061,11 +2059,11 @@ void ASTWriter::WriteHeaderSearch(const HeaderSearch &HS) {
// changed since it was loaded. Also skip it if it's for a modular header
// from a different module; in that case, we rely on the module(s)
// containing the header to provide this information. Also skip it if it's
- // for a textual header from a different module that has not been included;
- // in that case, we don't need the information at all.
+ // for any header not from this module that has not been included; in that
+ // case, we don't need the information at all.
const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
- if (!HFI || (HFI->isModuleHeader && !HFI->isCompilingModuleHeader) ||
- (HFI->isTextualModuleHeader && !PP->alreadyIncluded(*File)))
+ if (!HFI || (!HFI->isCompilingModuleHeader &&
+ (HFI->isModuleHeader || !PP->alreadyIncluded(*File))))
continue;
// Massage the file path into an appropriate form.
>From 2993a63f83b6d74eef4b5815dda08d6b4fe8f441 Mon Sep 17 00:00:00 2001
From: Jan Svoboda <jan_svoboda at apple.com>
Date: Tue, 23 Apr 2024 12:42:40 -0700
Subject: [PATCH 5/8] Don't add modules for textual headers to
`ModulesToProcess`
---
clang/lib/Serialization/ASTWriter.cpp | 63 +++++++++++++++------------
1 file changed, 35 insertions(+), 28 deletions(-)
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index d10be3fca3194e..4265ab42eda8e0 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -171,35 +171,9 @@ GetAffectingModuleMaps(const Preprocessor &PP, Module *RootModule) {
.ModulesPruneNonAffectingModuleMaps)
return std::nullopt;
- SmallVector<const Module *> ModulesToProcess{RootModule};
-
const HeaderSearch &HS = PP.getHeaderSearchInfo();
-
- SmallVector<OptionalFileEntryRef, 16> FilesByUID;
- HS.getFileMgr().GetUniqueIDMapping(FilesByUID);
-
- if (FilesByUID.size() > HS.header_file_size())
- FilesByUID.resize(HS.header_file_size());
-
- for (unsigned UID = 0, LastUID = FilesByUID.size(); UID != LastUID; ++UID) {
- OptionalFileEntryRef File = FilesByUID[UID];
- if (!File)
- continue;
-
- const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
- if (!HFI || (!HFI->isCompilingModuleHeader &&
- (HFI->isModuleHeader || !PP.alreadyIncluded(*File))))
- continue;
-
- for (const auto &KH : HS.findResolvedModulesForHeader(*File)) {
- if (!KH.getModule())
- continue;
- ModulesToProcess.push_back(KH.getModule());
- }
- }
-
const ModuleMap &MM = HS.getModuleMap();
- SourceManager &SourceMgr = PP.getSourceManager();
+ const SourceManager &SourceMgr = PP.getSourceManager();
std::set<const FileEntry *> ModuleMaps;
auto CollectIncludingModuleMaps = [&](FileID FID, FileEntryRef F) {
@@ -234,12 +208,45 @@ GetAffectingModuleMaps(const Preprocessor &PP, Module *RootModule) {
}
};
- for (const Module *CurrentModule : ModulesToProcess) {
+ // Handle all the affecting modules referenced from the root module.
+
+ std::queue<const Module *> Q;
+ Q.push(RootModule);
+ while (!Q.empty()) {
+ const Module *CurrentModule = Q.front();
+ Q.pop();
+
CollectIncludingMapsFromAncestors(CurrentModule);
for (const Module *ImportedModule : CurrentModule->Imports)
CollectIncludingMapsFromAncestors(ImportedModule);
for (const Module *UndeclaredModule : CurrentModule->UndeclaredUses)
CollectIncludingMapsFromAncestors(UndeclaredModule);
+
+ for (auto *M : CurrentModule->submodules())
+ Q.push(M);
+ }
+
+ // Handle textually-included headers that belong to other modules.
+
+ SmallVector<OptionalFileEntryRef, 16> FilesByUID;
+ HS.getFileMgr().GetUniqueIDMapping(FilesByUID);
+
+ if (FilesByUID.size() > HS.header_file_size())
+ FilesByUID.resize(HS.header_file_size());
+
+ for (unsigned UID = 0, LastUID = FilesByUID.size(); UID != LastUID; ++UID) {
+ OptionalFileEntryRef File = FilesByUID[UID];
+ if (!File)
+ continue;
+
+ const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
+ if (!HFI || (!HFI->isCompilingModuleHeader &&
+ (HFI->isModuleHeader || !PP.alreadyIncluded(*File))))
+ continue;
+
+ for (const auto &KH : HS.findResolvedModulesForHeader(*File))
+ if (const Module *M = KH.getModule())
+ CollectIncludingMapsFromAncestors(M);
}
return ModuleMaps;
>From b03c34f99bd90398f0599b5703cbf82d8b881981 Mon Sep 17 00:00:00 2001
From: Jan Svoboda <jan_svoboda at apple.com>
Date: Tue, 23 Apr 2024 13:57:19 -0700
Subject: [PATCH 6/8] **Locally** included
---
clang/include/clang/Lex/HeaderSearch.h | 14 ++++--
clang/lib/Lex/HeaderSearch.cpp | 1 +
clang/lib/Serialization/ASTWriter.cpp | 2 +-
...e-non-affecting-module-map-files-textual.c | 46 +++++++++++++++----
4 files changed, 48 insertions(+), 15 deletions(-)
diff --git a/clang/include/clang/Lex/HeaderSearch.h b/clang/include/clang/Lex/HeaderSearch.h
index c5f90ef4cb3682..5ac63dddd4d4ea 100644
--- a/clang/include/clang/Lex/HeaderSearch.h
+++ b/clang/include/clang/Lex/HeaderSearch.h
@@ -56,6 +56,12 @@ class TargetInfo;
/// The preprocessor keeps track of this information for each
/// file that is \#included.
struct HeaderFileInfo {
+ // TODO: Whether the file was included is not a property of the file itself.
+ // It's a preprocessor state, move it there.
+ /// True if this file has been included (or imported) **locally**.
+ LLVM_PREFERRED_TYPE(bool)
+ unsigned IsLocallyIncluded : 1;
+
// TODO: Whether the file was imported is not a property of the file itself.
// It's a preprocessor state, move it there.
/// True if this is a \#import'd file.
@@ -135,10 +141,10 @@ struct HeaderFileInfo {
StringRef Framework;
HeaderFileInfo()
- : isImport(false), isPragmaOnce(false), DirInfo(SrcMgr::C_User),
- External(false), isModuleHeader(false), isTextualModuleHeader(false),
- isCompilingModuleHeader(false), Resolved(false),
- IndexHeaderMapHeader(false), IsValid(false) {}
+ : IsLocallyIncluded(false), isImport(false), isPragmaOnce(false),
+ DirInfo(SrcMgr::C_User), External(false), isModuleHeader(false),
+ isTextualModuleHeader(false), isCompilingModuleHeader(false),
+ Resolved(false), IndexHeaderMapHeader(false), IsValid(false) {}
/// Retrieve the controlling macro for this header file, if
/// any.
diff --git a/clang/lib/Lex/HeaderSearch.cpp b/clang/lib/Lex/HeaderSearch.cpp
index 0632882b296146..574723b33866af 100644
--- a/clang/lib/Lex/HeaderSearch.cpp
+++ b/clang/lib/Lex/HeaderSearch.cpp
@@ -1574,6 +1574,7 @@ bool HeaderSearch::ShouldEnterIncludeFile(Preprocessor &PP,
}
}
+ FileInfo.IsLocallyIncluded = true;
IsFirstIncludeOfFile = PP.markIncluded(File);
return true;
}
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 4265ab42eda8e0..50413fc44bff24 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -241,7 +241,7 @@ GetAffectingModuleMaps(const Preprocessor &PP, Module *RootModule) {
const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
if (!HFI || (!HFI->isCompilingModuleHeader &&
- (HFI->isModuleHeader || !PP.alreadyIncluded(*File))))
+ (HFI->isModuleHeader || !HFI->IsLocallyIncluded)))
continue;
for (const auto &KH : HS.findResolvedModulesForHeader(*File))
diff --git a/clang/test/Modules/prune-non-affecting-module-map-files-textual.c b/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
index 485e360d72bec1..ae3f3fe85e6517 100644
--- a/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
+++ b/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
@@ -1,20 +1,46 @@
// This test checks that a module map with a textual header can be marked as
-// non-affecting if its header did not get included.
+// non-affecting.
// RUN: rm -rf %t && mkdir %t
// RUN: split-file %s %t
+//--- X.modulemap
+module X { textual header "X.h" }
+//--- X.h
+typedef int X_int;
+
+//--- Y.modulemap
+module Y { textual header "Y.h" }
+//--- Y.h
+typedef int Y_int;
+
//--- A.modulemap
-module A { textual header "A.h" }
-//--- B.modulemap
-module B { header "B.h" }
+module A { header "A.h" export * }
//--- A.h
-//--- B.h
+#include "X.h"
-// RUN: %clang_cc1 -fmodules -emit-module %t/B.modulemap -fmodule-name=B -o %t/B0.pcm \
-// RUN: -fmodule-map-file=%t/A.modulemap -fmodule-map-file=%t/B.modulemap
+// RUN: %clang_cc1 -fmodules -emit-module %t/A.modulemap -fmodule-name=A -o %t/A0.pcm \
+// RUN: -fmodule-map-file=%t/X.modulemap
+// RUN: %clang_cc1 -fsyntax-only -module-file-info %t/A0.pcm | FileCheck %s --check-prefix=A0 --implicit-check-not=Y.modulemap
+// A0: Input file: {{.*}}/X.modulemap
-// RUN: %clang_cc1 -fmodules -emit-module %t/B.modulemap -fmodule-name=B -o %t/B1.pcm \
-// RUN: -fmodule-map-file=%t/B.modulemap
+// RUN: %clang_cc1 -fmodules -emit-module %t/A.modulemap -fmodule-name=A -o %t/A1.pcm \
+// RUN: -fmodule-map-file=%t/X.modulemap -fmodule-map-file=%t/Y.modulemap
+// RUN: %clang_cc1 -fsyntax-only -module-file-info %t/A0.pcm | FileCheck %s --check-prefix=A1 \
+// RUN: --implicit-check-not=Y.modulemap
+// A1: Input file: {{.*}}/X.modulemap
+
+// RUN: diff %t/A0.pcm %t/A1.pcm
+
+//--- B.modulemap
+module B { header "B.h" export * }
+//--- B.h
+#include "A.h"
+typedef X_int B_int;
-// RUN: diff %t/B0.pcm %t/B1.pcm
+// RUN: %clang_cc1 -fmodules -emit-module %t/B.modulemap -fmodule-name=B -o %t/B.pcm \
+// RUN: -fmodule-file=A=%t/A0.pcm \
+// RUN: -fmodule-map-file=%t/A.modulemap -fmodule-map-file=%t/X.modulemap -fmodule-map-file=%t/Y.modulemap
+// RUN: %clang_cc1 -fsyntax-only -module-file-info %t/B.pcm | FileCheck %s --check-prefix=B \
+// RUN: --implicit-check-not=X.modulemap --implicit-check-not=Y.modulemap
+// B: Input file: {{.*}}/B.modulemap
>From 1228f5c1ce904deec649f92c3d858bd3983c37b9 Mon Sep 17 00:00:00 2001
From: Jan Svoboda <jan_svoboda at apple.com>
Date: Wed, 24 Apr 2024 08:31:58 -0700
Subject: [PATCH 7/8] Fix test on Windows
---
.../Modules/prune-non-affecting-module-map-files-textual.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/clang/test/Modules/prune-non-affecting-module-map-files-textual.c b/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
index ae3f3fe85e6517..fce325d4774c27 100644
--- a/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
+++ b/clang/test/Modules/prune-non-affecting-module-map-files-textual.c
@@ -22,13 +22,13 @@ module A { header "A.h" export * }
// RUN: %clang_cc1 -fmodules -emit-module %t/A.modulemap -fmodule-name=A -o %t/A0.pcm \
// RUN: -fmodule-map-file=%t/X.modulemap
// RUN: %clang_cc1 -fsyntax-only -module-file-info %t/A0.pcm | FileCheck %s --check-prefix=A0 --implicit-check-not=Y.modulemap
-// A0: Input file: {{.*}}/X.modulemap
+// A0: Input file: {{.*}}X.modulemap
// RUN: %clang_cc1 -fmodules -emit-module %t/A.modulemap -fmodule-name=A -o %t/A1.pcm \
// RUN: -fmodule-map-file=%t/X.modulemap -fmodule-map-file=%t/Y.modulemap
// RUN: %clang_cc1 -fsyntax-only -module-file-info %t/A0.pcm | FileCheck %s --check-prefix=A1 \
// RUN: --implicit-check-not=Y.modulemap
-// A1: Input file: {{.*}}/X.modulemap
+// A1: Input file: {{.*}}X.modulemap
// RUN: diff %t/A0.pcm %t/A1.pcm
@@ -43,4 +43,4 @@ typedef X_int B_int;
// RUN: -fmodule-map-file=%t/A.modulemap -fmodule-map-file=%t/X.modulemap -fmodule-map-file=%t/Y.modulemap
// RUN: %clang_cc1 -fsyntax-only -module-file-info %t/B.pcm | FileCheck %s --check-prefix=B \
// RUN: --implicit-check-not=X.modulemap --implicit-check-not=Y.modulemap
-// B: Input file: {{.*}}/B.modulemap
+// B: Input file: {{.*}}B.modulemap
>From 14ac904a7c9e99dd8d8cf4c48816d2f461025f1d Mon Sep 17 00:00:00 2001
From: Jan Svoboda <jan_svoboda at apple.com>
Date: Wed, 24 Apr 2024 09:04:49 -0700
Subject: [PATCH 8/8] Split out HFI conditions
---
clang/lib/Serialization/ASTWriter.cpp | 25 ++++++++++++-------------
1 file changed, 12 insertions(+), 13 deletions(-)
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 50413fc44bff24..63712b848018b3 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -240,9 +240,12 @@ GetAffectingModuleMaps(const Preprocessor &PP, Module *RootModule) {
continue;
const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
- if (!HFI || (!HFI->isCompilingModuleHeader &&
- (HFI->isModuleHeader || !HFI->IsLocallyIncluded)))
- continue;
+ if (!HFI)
+ continue; // We have no information on this being a header file.
+ if (!HFI->isCompilingModuleHeader && HFI->isModuleHeader)
+ continue; // Modular header, handled in the above module-based loop.
+ if (!HFI->isCompilingModuleHeader && !HFI->IsLocallyIncluded)
+ continue; // Non-modular header not included locally is not affecting.
for (const auto &KH : HS.findResolvedModulesForHeader(*File))
if (const Module *M = KH.getModule())
@@ -2061,17 +2064,13 @@ void ASTWriter::WriteHeaderSearch(const HeaderSearch &HS) {
if (!File)
continue;
- // Get the file info. Skip emitting this file if we have no information on
- // it as a header file (in which case HFI will be null) or if it hasn't
- // changed since it was loaded. Also skip it if it's for a modular header
- // from a different module; in that case, we rely on the module(s)
- // containing the header to provide this information. Also skip it if it's
- // for any header not from this module that has not been included; in that
- // case, we don't need the information at all.
const HeaderFileInfo *HFI = HS.getExistingLocalFileInfo(*File);
- if (!HFI || (!HFI->isCompilingModuleHeader &&
- (HFI->isModuleHeader || !PP->alreadyIncluded(*File))))
- continue;
+ if (!HFI)
+ continue; // We have no information on this being a header file.
+ if (!HFI->isCompilingModuleHeader && HFI->isModuleHeader)
+ continue; // Header file info is tracked by the owning module file.
+ if (!HFI->isCompilingModuleHeader && !PP->alreadyIncluded(*File))
+ continue; // Non-modular header not included is not needed.
// Massage the file path into an appropriate form.
StringRef Filename = File->getName();
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