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-rw-r--r--clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp2
-rw-r--r--clang/lib/Frontend/CompilerInvocation.cpp6
-rw-r--r--clang/test/Modules/module-debuginfo-prefix.m23
3 files changed, 31 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp b/clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp
index c164cec5d94..5d97807316b 100644
--- a/clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp
+++ b/clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp
@@ -156,6 +156,8 @@ public:
LangOpts.CurrentModule.empty() ? MainFileName : LangOpts.CurrentModule;
CodeGenOpts.setDebugInfo(codegenoptions::FullDebugInfo);
CodeGenOpts.setDebuggerTuning(CI.getCodeGenOpts().getDebuggerTuning());
+ CodeGenOpts.DebugPrefixMap =
+ CI.getInvocation().getCodeGenOpts().DebugPrefixMap;
}
~PCHContainerGenerator() override = default;
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 8840e2ed004..f511fdcd87a 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -3264,6 +3264,12 @@ std::string CompilerInvocation::getModuleHash() const {
code = ext->hashExtension(code);
}
+ // When compiling with -gmodules, also hash -fdebug-prefix-map as it
+ // affects the debug info in the PCM.
+ if (getCodeGenOpts().DebugTypeExtRefs)
+ for (const auto &KeyValue : getCodeGenOpts().DebugPrefixMap)
+ code = hash_combine(code, KeyValue.first, KeyValue.second);
+
// Extend the signature with the enabled sanitizers, if at least one is
// enabled. Sanitizers which cannot affect AST generation aren't hashed.
SanitizerSet SanHash = LangOpts->Sanitize;
diff --git a/clang/test/Modules/module-debuginfo-prefix.m b/clang/test/Modules/module-debuginfo-prefix.m
new file mode 100644
index 00000000000..c4a7d2b614a
--- /dev/null
+++ b/clang/test/Modules/module-debuginfo-prefix.m
@@ -0,0 +1,23 @@
+// REQUIRES: asserts
+
+// Modules:
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -x objective-c -fmodules -fmodule-format=obj \
+// RUN: -fdebug-prefix-map=%S/Inputs=/OVERRIDE \
+// RUN: -fimplicit-module-maps -DMODULES -fmodules-cache-path=%t %s \
+// RUN: -I %S/Inputs -I %t -emit-llvm -o %t.ll \
+// RUN: -mllvm -debug-only=pchcontainer &>%t-mod.ll
+// RUN: cat %t-mod.ll | FileCheck %s
+
+// PCH:
+// RUN: %clang_cc1 -x objective-c -emit-pch -fmodule-format=obj -I %S/Inputs \
+// RUN: -fdebug-prefix-map=%S/Inputs=/OVERRIDE \
+// RUN: -o %t.pch %S/Inputs/DebugObjC.h \
+// RUN: -mllvm -debug-only=pchcontainer &>%t-pch.ll
+// RUN: cat %t-pch.ll | FileCheck %s
+
+#ifdef MODULES
+@import DebugObjC;
+#endif
+
+// CHECK: !DIFile({{.*}}"/OVERRIDE/DebugObjC.h"
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