[clang][bytecode] Remove InterpFrame::IsBottom flag (#159279)
The bottom frame is the one without a parent. No need to save that
information separately.
diff --git a/clang/lib/AST/ByteCode/InterpFrame.cpp b/clang/lib/AST/ByteCode/InterpFrame.cpp
index b9dc2ae..c411a37 100644
--- a/clang/lib/AST/ByteCode/InterpFrame.cpp
+++ b/clang/lib/AST/ByteCode/InterpFrame.cpp
@@ -24,13 +24,13 @@
InterpFrame::InterpFrame(InterpState &S)
: Caller(nullptr), S(S), Depth(0), Func(nullptr), RetPC(CodePtr()),
- ArgSize(0), Args(nullptr), FrameOffset(0), IsBottom(true) {}
+ ArgSize(0), Args(nullptr), FrameOffset(0) {}
InterpFrame::InterpFrame(InterpState &S, const Function *Func,
InterpFrame *Caller, CodePtr RetPC, unsigned ArgSize)
: Caller(Caller), S(S), Depth(Caller ? Caller->Depth + 1 : 0), Func(Func),
RetPC(RetPC), ArgSize(ArgSize), Args(static_cast<char *>(S.Stk.top())),
- FrameOffset(S.Stk.size()), IsBottom(!Caller) {
+ FrameOffset(S.Stk.size()) {
if (!Func)
return;
diff --git a/clang/lib/AST/ByteCode/InterpFrame.h b/clang/lib/AST/ByteCode/InterpFrame.h
index cf4d27d..1298511 100644
--- a/clang/lib/AST/ByteCode/InterpFrame.h
+++ b/clang/lib/AST/ByteCode/InterpFrame.h
@@ -129,7 +129,7 @@
bool isStdFunction() const;
- bool isBottomFrame() const { return IsBottom; }
+ bool isBottomFrame() const { return !Caller; }
void dump() const { dump(llvm::errs(), 0); }
void dump(llvm::raw_ostream &OS, unsigned Indent = 0) const;
@@ -179,7 +179,6 @@
const size_t FrameOffset;
/// Mapping from arg offsets to their argument blocks.
llvm::DenseMap<unsigned, std::unique_ptr<char[]>> Params;
- bool IsBottom = false;
};
} // namespace interp
