Module Debugging: Use a nonzero DWO id for precompiled headers.
PCH files don't have a module signature and LLVM uses a nonzero DWO id as
an indicator for skeleton / module CUs. This change pins the DWO id for PCH
files to a known constant value.
The correct long-term solution here is to implement a module signature
that is an actual dterministic hash (at the moment module signatures are
just random nonzero numbers) and then enable this for PCH files as well.
<rdar://problem/24290667>
llvm-svn: 258507
diff --git a/clang/test/Modules/ExtDebugInfo.cpp b/clang/test/Modules/ExtDebugInfo.cpp
index b9eae12..c4c6a29 100644
--- a/clang/test/Modules/ExtDebugInfo.cpp
+++ b/clang/test/Modules/ExtDebugInfo.cpp
@@ -102,3 +102,7 @@
// CHECK: !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !0, entity: !"_ZTSN8DebugCXX6StructE", line: 24)
+
+// CHECK: !DICompileUnit(
+// CHECK-SAME: splitDebugFilename:
+// CHECK-SAME: dwoId:
diff --git a/clang/test/Modules/ModuleDebugInfo.cpp b/clang/test/Modules/ModuleDebugInfo.cpp
index a2b735b..7344397 100644
--- a/clang/test/Modules/ModuleDebugInfo.cpp
+++ b/clang/test/Modules/ModuleDebugInfo.cpp
@@ -8,7 +8,6 @@
// RUN: %clang_cc1 -triple %itanium_abi_triple -x objective-c++ -std=c++11 -debug-info-kind=limited -fmodules -fmodule-format=obj -fimplicit-module-maps -DMODULES -fmodules-cache-path=%t %s -I %S/Inputs -I %t -emit-llvm -o %t.ll -mllvm -debug-only=pchcontainer &>%t-mod.ll
// RUN: cat %t-mod.ll | FileCheck %s
// RUN: cat %t-mod.ll | FileCheck --check-prefix=CHECK-NEG %s
-// RUN: cat %t-mod.ll | FileCheck --check-prefix=CHECK-DWO %s
// PCH:
// RUN: %clang_cc1 -triple %itanium_abi_triple -x c++ -std=c++11 -emit-pch -fmodule-format=obj -I %S/Inputs -o %t.pch %S/Inputs/DebugCXX.h -mllvm -debug-only=pchcontainer &>%t-pch.ll
@@ -22,7 +21,7 @@
// CHECK: distinct !DICompileUnit(language: DW_LANG_{{.*}}C_plus_plus,
// CHECK-SAME: isOptimized: false,
// CHECK-SAME-NOT: splitDebugFilename:
-// CHECK-DWO: dwoId:
+// CHECK: dwoId:
// CHECK: !DICompositeType(tag: DW_TAG_enumeration_type, name: "Enum"
// CHECK-SAME: identifier: "_ZTSN8DebugCXX4EnumE")