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
Alloca->setAlignment(Align);
// Set the DebugLocation to empty, so the store is recognized as a
// frame setup instruction by llvm::DwarfDebug::beginFunction().
- Builder.DisableDebugLocations();
+ NoLocation NL(*this, Builder);
Builder.CreateAlignedStore(BlockPointer, Alloca, Align);
- Builder.EnableDebugLocations();
BlockPointerDbgLoc = Alloca;
}
"Region stack mismatch, stack not empty!");
}
+
+NoLocation::NoLocation(CodeGenFunction &CGF, CGBuilderTy &B)
+ : DI(CGF.getDebugInfo()), Builder(B) {
+ if (DI) {
+ SavedLoc = DI->getLocation();
+ DI->CurLoc = SourceLocation();
+ Builder.SetCurrentDebugLocation(llvm::DebugLoc());
+ }
+}
+
+NoLocation::~NoLocation() {
+ if (DI) {
+ assert(Builder.getCurrentDebugLocation().isUnknown());
+ DI->CurLoc = SavedLoc;
+ }
+}
+
+BuiltinLocation::BuiltinLocation(CodeGenFunction &CGF, CGBuilderTy &B)
+ : DI(CGF.getDebugInfo()), Builder(B) {
+ if (DI) {
+ SavedLoc = DI->getLocation();
+ // Sync the Builder.
+ DI->EmitLocation(Builder, SavedLoc);
+ DI->CurLoc = SourceLocation();
+ // Construct a location that has a valid scope, but no line info.
+ llvm::MDNode *Scope = DI->LexicalBlockStack.empty() ?
+ DI->TheCU : DI->LexicalBlockStack.back();
+ Builder.SetCurrentDebugLocation(llvm::DebugLoc::get(0, 0, Scope));
+ }
+}
+
+BuiltinLocation::~BuiltinLocation() {
+ if (DI) {
+ assert(Builder.getCurrentDebugLocation().getLine() == 0);
+ DI->CurLoc = SavedLoc;
+ }
+}
+
void CGDebugInfo::setLocation(SourceLocation Loc) {
// If the new location isn't valid return.
if (Loc.isInvalid()) return;
/// previous location will be reused.
void CGDebugInfo::EmitLocation(CGBuilderTy &Builder, SourceLocation Loc,
bool ForceColumnInfo) {
-
// Update our current location
setLocation(Loc);
/// 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;
/// \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