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-rw-r--r--clang/lib/CodeGen/CGDebugInfo.cpp11
-rw-r--r--clang/test/CodeGen/debug-info-preprocessed-file.i11
2 files changed, 22 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index cca0b51a0ff..fe2de36ac42 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -29,6 +29,7 @@
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/Version.h"
#include "clang/Frontend/CodeGenOptions.h"
+#include "clang/Frontend/FrontendOptions.h"
#include "clang/Lex/HeaderSearchOptions.h"
#include "clang/Lex/ModuleMap.h"
#include "clang/Lex/PreprocessorOptions.h"
@@ -495,6 +496,16 @@ void CGDebugInfo::CreateCompileUnit() {
llvm::sys::path::append(MainFileDirSS, MainFileName);
MainFileName = MainFileDirSS.str();
}
+ // If the main file name provided is identical to the input file name, and
+ // if the input file is a preprocessed source, use the module name for
+ // debug info. The module name comes from the name specified in the first
+ // linemarker if the input is a preprocessed source.
+ if (MainFile->getName() == MainFileName &&
+ FrontendOptions::getInputKindForExtension(
+ MainFile->getName().rsplit('.').second)
+ .isPreprocessed())
+ MainFileName = CGM.getModule().getName().str();
+
CSKind = computeChecksum(SM.getMainFileID(), Checksum);
}
diff --git a/clang/test/CodeGen/debug-info-preprocessed-file.i b/clang/test/CodeGen/debug-info-preprocessed-file.i
new file mode 100644
index 00000000000..d231b45d67c
--- /dev/null
+++ b/clang/test/CodeGen/debug-info-preprocessed-file.i
@@ -0,0 +1,11 @@
+# 1 "/foo/bar/preprocessed-input.c"
+# 1 "<built-in>" 1
+# 1 "<built-in>" 3
+# 318 "<built-in>" 3
+# 1 "<command line>" 1
+# 1 "<built-in>" 2
+# 1 "preprocessed-input.c" 2
+
+// RUN: %clang -g -c -S -emit-llvm -o - %s | FileCheck %s
+// CHECK: !DICompileUnit(language: DW_LANG_C99, file: ![[FILE:[0-9]+]]
+// CHECK: ![[FILE]] = !DIFile(filename: "/foo/bar/preprocessed-input.c"
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