Vendor import of llvm trunk r238337:vendor/llvm/llvm-trunk-r238337

https://llvm.org/svn/llvm-project/llvm/trunk@238337

1 files changed, 43 insertions, 48 deletions

diff --git a/lib/CodeGen/AsmPrinter/DebugLocEntry.h b/lib/CodeGen/AsmPrinter/DebugLocEntry.h
index b4fcada59ecc..6a943c64ea22 100644
--- a/lib/CodeGen/AsmPrinter/DebugLocEntry.h
+++ b/lib/CodeGen/AsmPrinter/DebugLocEntry.h
@@ -9,52 +9,51 @@
 
 #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H
 #define LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H
+#include "llvm/ADT/SmallString.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/DebugInfo.h"
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/MC/MachineLocation.h"
 
 namespace llvm {
-class MDNode;
+class AsmPrinter;
+class DebugLocStream;
+
 /// \brief This struct describes location entries emitted in the .debug_loc
 /// section.
 class DebugLocEntry {
-  // Begin and end symbols for the address range that this location is valid.
+  /// Begin and end symbols for the address range that this location is valid.
   const MCSymbol *Begin;
   const MCSymbol *End;
 
 public:
-  /// A single location or constant.
+  /// \brief A single location or constant.
   struct Value {
-    Value(const MDNode *Var, const MDNode *Expr, int64_t i)
-        : Variable(Var), Expression(Expr), EntryKind(E_Integer) {
+    Value(const DIExpression *Expr, int64_t i)
+        : Expression(Expr), EntryKind(E_Integer) {
       Constant.Int = i;
     }
-    Value(const MDNode *Var, const MDNode *Expr, const ConstantFP *CFP)
-        : Variable(Var), Expression(Expr), EntryKind(E_ConstantFP) {
+    Value(const DIExpression *Expr, const ConstantFP *CFP)
+        : Expression(Expr), EntryKind(E_ConstantFP) {
       Constant.CFP = CFP;
     }
-    Value(const MDNode *Var, const MDNode *Expr, const ConstantInt *CIP)
-        : Variable(Var), Expression(Expr), EntryKind(E_ConstantInt) {
+    Value(const DIExpression *Expr, const ConstantInt *CIP)
+        : Expression(Expr), EntryKind(E_ConstantInt) {
       Constant.CIP = CIP;
     }
-    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());
+    Value(const DIExpression *Expr, MachineLocation Loc)
+        : Expression(Expr), EntryKind(E_Location), Loc(Loc) {
+      assert(cast<DIExpression>(Expr)->isValid());
     }
 
-    // The variable to which this location entry corresponds.
-    const MDNode *Variable;
-
-    // Any complex address location expression for this Value.
-    const MDNode *Expression;
+    /// Any complex address location expression for this Value.
+    const DIExpression *Expression;
 
-    // Type of entry that this represents.
+    /// Type of entry that this represents.
     enum EntryType { E_Location, E_Integer, E_ConstantFP, E_ConstantInt };
     enum EntryType EntryKind;
 
-    // Either a constant,
+    /// Either a constant,
     union {
       int64_t Int;
       const ConstantFP *CFP;
@@ -72,10 +71,8 @@ public:
     const ConstantFP *getConstantFP() const { return Constant.CFP; }
     const ConstantInt *getConstantInt() const { return Constant.CIP; }
     MachineLocation getLoc() const { return Loc; }
-    const MDNode *getVariableNode() const { return Variable; }
-    DIVariable getVariable() const { return DIVariable(Variable); }
-    bool isVariablePiece() const { return getExpression().isVariablePiece(); }
-    DIExpression getExpression() const { return DIExpression(Expression); }
+    bool isBitPiece() const { return getExpression()->isBitPiece(); }
+    const DIExpression *getExpression() const { return Expression; }
     friend bool operator==(const Value &, const Value &);
     friend bool operator<(const Value &, const Value &);
   };
@@ -92,17 +89,14 @@ public:
   }
 
   /// \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.
+  /// 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()) {
+      auto *Expr = cast_or_null<DIExpression>(Values[0].Expression);
+      auto *NextExpr = cast_or_null<DIExpression>(Next.Values[0].Expression);
+      if (Expr->isBitPiece() && NextExpr->isBitPiece()) {
         addValues(Next.Values);
         End = Next.End;
         return true;
@@ -131,24 +125,28 @@ public:
     Values.append(Vals.begin(), Vals.end());
     sortUniqueValues();
     assert(std::all_of(Values.begin(), Values.end(), [](DebugLocEntry::Value V){
-          return V.isVariablePiece();
+          return V.isBitPiece();
         }) && "value must be a piece");
   }
 
-  // Sort the pieces by offset.
+  // \brief 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());
+    Values.erase(
+        std::unique(
+            Values.begin(), Values.end(), [](const Value &A, const Value &B) {
+              return A.getExpression() == B.getExpression();
+            }),
+        Values.end());
   }
+
+  /// \brief Lower this entry into a DWARF expression.
+  void finalize(const AsmPrinter &AP, DebugLocStream &Locs,
+                const DIBasicType *BT);
 };
 
-/// Compare two Values for equality.
+/// \brief Compare two Values for equality.
 inline bool operator==(const DebugLocEntry::Value &A,
                        const DebugLocEntry::Value &B) {
   if (A.EntryKind != B.EntryKind)
@@ -157,9 +155,6 @@ inline bool operator==(const DebugLocEntry::Value &A,
   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;
@@ -173,11 +168,11 @@ inline bool operator==(const DebugLocEntry::Value &A,
   llvm_unreachable("unhandled EntryKind");
 }
 
-/// Compare two pieces based on their offset.
+/// \brief 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();
+  return A.getExpression()->getBitPieceOffset() <
+         B.getExpression()->getBitPieceOffset();
 }
 
 }