Allow creation of "dummy" compile units for debug information.
- Although gross, this is needed currently to ensure that we produce
well formed debug information (to match pace with the assertions
being added to DebugInfo in LLVM).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62734 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index d3fee11..e0a52d6 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -47,21 +47,24 @@
/// getOrCreateCompileUnit - Get the compile unit from the cache or create a new
/// one if necessary. This returns null for invalid source locations.
llvm::DICompileUnit CGDebugInfo::getOrCreateCompileUnit(SourceLocation Loc) {
- if (Loc.isInvalid())
- return llvm::DICompileUnit();
+ // FIXME: Until we do a complete job of emitting debug information,
+ // we need to support making dummy compile units so that we generate
+ // "well formed" debug info.
+ const FileEntry *FE = 0;
- SourceManager &SM = M->getContext().getSourceManager();
- Loc = SM.getInstantiationLoc(Loc);
- const FileEntry *FE = SM.getFileEntryForID(SM.getFileID(Loc));
- if (FE == 0) return llvm::DICompileUnit();
-
+ if (Loc.isValid()) {
+ SourceManager &SM = M->getContext().getSourceManager();
+ Loc = SM.getInstantiationLoc(Loc);
+ FE = SM.getFileEntryForID(SM.getFileID(Loc));
+ }
+
// See if this compile unit has been used before.
llvm::DICompileUnit &Unit = CompileUnitCache[FE];
if (!Unit.isNull()) return Unit;
// Get source file information.
- const char *FileName = FE->getName();
- const char *DirName = FE->getDir()->getName();
+ const char *FileName = FE ? FE->getName() : "<unknown>";
+ const char *DirName = FE ? FE->getDir()->getName() : "";
// Create new compile unit.
// FIXME: Handle other language IDs as well.