Merging r195495:
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r195495 | mren | 2013-11-22 11:42:45 -0800 (Fri, 22 Nov 2013) | 5 lines
Debug Info: add a "Debug Info Version" module flag to output the current debug
info version number.
Will error out when modules have different version numbers.
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_34@196812 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 72f909f..2acb2ec 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -258,6 +258,11 @@
// We can change from Warning to Latest if such mode is supported.
getModule().addModuleFlag(llvm::Module::Warning, "Dwarf Version",
CodeGenOpts.DwarfVersion);
+ if (DebugInfo)
+ // We support a single version in the linked module: error out when
+ // modules do not have the same version.
+ getModule().addModuleFlag(llvm::Module::Error, "Debug Info Version",
+ llvm::dwarf::DEBUG_INFO_VERSION);
SimplifyPersonality();
diff --git a/test/CodeGen/debug-info-version.c b/test/CodeGen/debug-info-version.c
new file mode 100644
index 0000000..3a74876
--- /dev/null
+++ b/test/CodeGen/debug-info-version.c
@@ -0,0 +1,8 @@
+// RUN: %clang -g -S -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang -S -emit-llvm -o - %s | FileCheck %s --check-prefix=NO_DEBUG
+int main (void) {
+ return 0;
+}
+
+// CHECK: metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+// NO_DEBUG-NOT: metadata !"Debug Info Version"