Replace llvm::DIBuilder::DisableDebugLocations() with two RAII interfaces
inspired by CodegenFunction::LexicalScope.
- NoLocation temporarily turns off debug locations altogether.
This is useful for emitting instructions that should be
counted towards the function prologue.
- BuiltinLocation temporarily switches to an artificial debug location
that has a valid scope, but no line information. This is useful when
emitting compiler-generated helper functions that have no source
location associated with them.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186552 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDebugInfo.h b/lib/CodeGen/CGDebugInfo.h
index 010e5ef..3b88b11 100644
--- a/lib/CodeGen/CGDebugInfo.h
+++ b/lib/CodeGen/CGDebugInfo.h
@@ -47,6 +47,8 @@
/// and is responsible for emitting to llvm globals or pass directly to
/// the backend.
class CGDebugInfo {
+ friend class NoLocation;
+ friend class BuiltinLocation;
CodeGenModule &CGM;
const CodeGenOptions::DebugInfoKind DebugKind;
llvm::DIBuilder DBuilder;
@@ -387,6 +389,40 @@
/// \param Force Assume DebugColumnInfo option is true.
unsigned getColumnNumber(SourceLocation Loc, bool Force=false);
};
+
+/// NoLocation - An RAII object that temporarily disables debug
+/// locations. This is useful for emitting instructions that should be
+/// counted towards the function prologue.
+class NoLocation {
+ SourceLocation SavedLoc;
+ CGDebugInfo *DI;
+ CGBuilderTy &Builder;
+public:
+ NoLocation(CodeGenFunction &CGF, CGBuilderTy &B);
+ /// ~NoLocation - Autorestore everything back to normal.
+ ~NoLocation();
+};
+
+/// BuiltinLocation - An RAII object that temporarily switches to an
+/// artificial debug location that has a valid scope, but no line
+/// information. This is useful when emitting compiler-generated
+/// helper functions that have no source location associated with
+/// them.
+///
+/// This is necessary because pasing an empty SourceLocation to
+/// CGDebugInfo::setLocation() will result in the last valid location
+/// being reused.
+class BuiltinLocation {
+ SourceLocation SavedLoc;
+ CGDebugInfo *DI;
+ CGBuilderTy &Builder;
+public:
+ BuiltinLocation(CodeGenFunction &CGF, CGBuilderTy &B);
+ /// ~BuildinLocation - Autorestore everything back to normal.
+ ~BuiltinLocation();
+};
+
+
} // namespace CodeGen
} // namespace clang