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-rw-r--r--contrib/llvm/lib/CodeGen/AsmPrinter/DebugLocEntry.h146
1 files changed, 104 insertions, 42 deletions
diff --git a/contrib/llvm/lib/CodeGen/AsmPrinter/DebugLocEntry.h b/contrib/llvm/lib/CodeGen/AsmPrinter/DebugLocEntry.h
index 3beb799..b4fcada 100644
--- a/contrib/llvm/lib/CodeGen/AsmPrinter/DebugLocEntry.h
+++ b/contrib/llvm/lib/CodeGen/AsmPrinter/DebugLocEntry.h
@@ -7,14 +7,14 @@
//
//===----------------------------------------------------------------------===//
-#ifndef CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H__
-#define CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H__
+#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H
+#define LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H
#include "llvm/IR/Constants.h"
-#include "llvm/MC/MachineLocation.h"
+#include "llvm/IR/DebugInfo.h"
#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MachineLocation.h"
namespace llvm {
-class DwarfCompileUnit;
class MDNode;
/// \brief This struct describes location entries emitted in the .debug_loc
/// section.
@@ -26,25 +26,30 @@ class DebugLocEntry {
public:
/// A single location or constant.
struct Value {
- Value(const MDNode *Var, int64_t i)
- : Variable(Var), EntryKind(E_Integer) {
+ Value(const MDNode *Var, const MDNode *Expr, int64_t i)
+ : Variable(Var), Expression(Expr), EntryKind(E_Integer) {
Constant.Int = i;
}
- Value(const MDNode *Var, const ConstantFP *CFP)
- : Variable(Var), EntryKind(E_ConstantFP) {
+ Value(const MDNode *Var, const MDNode *Expr, const ConstantFP *CFP)
+ : Variable(Var), Expression(Expr), EntryKind(E_ConstantFP) {
Constant.CFP = CFP;
}
- Value(const MDNode *Var, const ConstantInt *CIP)
- : Variable(Var), EntryKind(E_ConstantInt) {
+ Value(const MDNode *Var, const MDNode *Expr, const ConstantInt *CIP)
+ : Variable(Var), Expression(Expr), EntryKind(E_ConstantInt) {
Constant.CIP = CIP;
}
- Value(const MDNode *Var, MachineLocation Loc)
- : Variable(Var), EntryKind(E_Location), Loc(Loc) {
+ Value(const MDNode *Var, const MDNode *Expr, MachineLocation Loc)
+ : Variable(Var), Expression(Expr), EntryKind(E_Location), Loc(Loc) {
+ assert(DIVariable(Var).Verify());
+ assert(DIExpression(Expr).Verify());
}
// The variable to which this location entry corresponds.
const MDNode *Variable;
+ // Any complex address location expression for this Value.
+ const MDNode *Expression;
+
// Type of entry that this represents.
enum EntryType { E_Location, E_Integer, E_ConstantFP, E_ConstantInt };
enum EntryType EntryKind;
@@ -59,23 +64,6 @@ public:
// Or a location in the machine frame.
MachineLocation Loc;
- bool operator==(const Value &other) const {
- if (EntryKind != other.EntryKind)
- return false;
-
- switch (EntryKind) {
- case E_Location:
- return Loc == other.Loc;
- case E_Integer:
- return Constant.Int == other.Constant.Int;
- case E_ConstantFP:
- return Constant.CFP == other.Constant.CFP;
- case E_ConstantInt:
- return Constant.CIP == other.Constant.CIP;
- }
- llvm_unreachable("unhandled EntryKind");
- }
-
bool isLocation() const { return EntryKind == E_Location; }
bool isInt() const { return EntryKind == E_Integer; }
bool isConstantFP() const { return EntryKind == E_ConstantFP; }
@@ -84,40 +72,114 @@ public:
const ConstantFP *getConstantFP() const { return Constant.CFP; }
const ConstantInt *getConstantInt() const { return Constant.CIP; }
MachineLocation getLoc() const { return Loc; }
- const MDNode *getVariable() const { return Variable; }
+ const MDNode *getVariableNode() const { return Variable; }
+ DIVariable getVariable() const { return DIVariable(Variable); }
+ bool isVariablePiece() const { return getExpression().isVariablePiece(); }
+ DIExpression getExpression() const { return DIExpression(Expression); }
+ friend bool operator==(const Value &, const Value &);
+ friend bool operator<(const Value &, const Value &);
};
+
private:
- /// A list of locations/constants belonging to this entry.
+ /// A nonempty list of locations/constants belonging to this entry,
+ /// sorted by offset.
SmallVector<Value, 1> Values;
- /// The compile unit that this location entry is referenced by.
- const DwarfCompileUnit *Unit;
-
public:
- DebugLocEntry() : Begin(nullptr), End(nullptr), Unit(nullptr) {}
- DebugLocEntry(const MCSymbol *B, const MCSymbol *E,
- Value Val, const DwarfCompileUnit *U)
- : Begin(B), End(E), Unit(U) {
+ DebugLocEntry(const MCSymbol *B, const MCSymbol *E, Value Val)
+ : Begin(B), End(E) {
Values.push_back(std::move(Val));
}
+ /// \brief If this and Next are describing different pieces of the same
+ // variable, merge them by appending Next's values to the current
+ // list of values.
+ // Return true if the merge was successful.
+ bool MergeValues(const DebugLocEntry &Next) {
+ if (Begin == Next.Begin) {
+ DIExpression Expr(Values[0].Expression);
+ DIVariable Var(Values[0].Variable);
+ DIExpression NextExpr(Next.Values[0].Expression);
+ DIVariable NextVar(Next.Values[0].Variable);
+ if (Var == NextVar && Expr.isVariablePiece() &&
+ NextExpr.isVariablePiece()) {
+ addValues(Next.Values);
+ End = Next.End;
+ return true;
+ }
+ }
+ return false;
+ }
+
/// \brief Attempt to merge this DebugLocEntry with Next and return
/// true if the merge was successful. Entries can be merged if they
/// share the same Loc/Constant and if Next immediately follows this
/// Entry.
- bool Merge(const DebugLocEntry &Next) {
+ bool MergeRanges(const DebugLocEntry &Next) {
+ // If this and Next are describing the same variable, merge them.
if ((End == Next.Begin && Values == Next.Values)) {
End = Next.End;
return true;
}
return false;
}
+
const MCSymbol *getBeginSym() const { return Begin; }
const MCSymbol *getEndSym() const { return End; }
- const DwarfCompileUnit *getCU() const { return Unit; }
- const ArrayRef<Value> getValues() const { return Values; }
- void addValue(Value Val) { Values.push_back(Val); }
+ ArrayRef<Value> getValues() const { return Values; }
+ void addValues(ArrayRef<DebugLocEntry::Value> Vals) {
+ Values.append(Vals.begin(), Vals.end());
+ sortUniqueValues();
+ assert(std::all_of(Values.begin(), Values.end(), [](DebugLocEntry::Value V){
+ return V.isVariablePiece();
+ }) && "value must be a piece");
+ }
+
+ // Sort the pieces by offset.
+ // Remove any duplicate entries by dropping all but the first.
+ void sortUniqueValues() {
+ std::sort(Values.begin(), Values.end());
+ Values.erase(std::unique(Values.begin(), Values.end(),
+ [](const Value &A, const Value &B) {
+ return A.getVariable() == B.getVariable() &&
+ A.getExpression() == B.getExpression();
+ }),
+ Values.end());
+ }
};
+/// Compare two Values for equality.
+inline bool operator==(const DebugLocEntry::Value &A,
+ const DebugLocEntry::Value &B) {
+ if (A.EntryKind != B.EntryKind)
+ return false;
+
+ if (A.Expression != B.Expression)
+ return false;
+
+ if (A.Variable != B.Variable)
+ return false;
+
+ switch (A.EntryKind) {
+ case DebugLocEntry::Value::E_Location:
+ return A.Loc == B.Loc;
+ case DebugLocEntry::Value::E_Integer:
+ return A.Constant.Int == B.Constant.Int;
+ case DebugLocEntry::Value::E_ConstantFP:
+ return A.Constant.CFP == B.Constant.CFP;
+ case DebugLocEntry::Value::E_ConstantInt:
+ return A.Constant.CIP == B.Constant.CIP;
+ }
+ llvm_unreachable("unhandled EntryKind");
+}
+
+/// Compare two pieces based on their offset.
+inline bool operator<(const DebugLocEntry::Value &A,
+ const DebugLocEntry::Value &B) {
+ return A.getExpression().getPieceOffset() <
+ B.getExpression().getPieceOffset();
}
+
+}
+
#endif
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