[llvm-commits] CVS: llvm/lib/VMCore/Constants.cpp

[Chris Lattner]

Changes in directory llvm/lib/VMCore:

Constants.cpp updated: 1.47 -> 1.48

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Log message:

Fix a bug that brian reported


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Diffs of the changes:

Index: llvm/lib/VMCore/Constants.cpp
diff -u llvm/lib/VMCore/Constants.cpp:1.47 llvm/lib/VMCore/Constants.cpp:1.48
--- llvm/lib/VMCore/Constants.cpp:1.47	Wed Jul 23 10:22:26 2003
+++ llvm/lib/VMCore/Constants.cpp	Wed Jul 30 14:04:37 2003
@@ -463,6 +463,26 @@
 //===----------------------------------------------------------------------===//
 //                      Factory Function Implementation
 
+// ReplaceUsesOfWith - This is exactly the same as Value::replaceAllUsesWith,
+// except that it doesn't have all of the asserts.  The asserts fail because we
+// are half-way done resolving types, which causes some types to exist as two
+// different Type*'s at the same time.  This is a sledgehammer to work around
+// this problem.
+//
+static void ReplaceUsesOfWith(Value *Old, Value *New) {
+  while (!Old->use_empty()) {
+    User *Use = Old->use_back();
+    // Must handle Constants specially, we cannot call replaceUsesOfWith on a
+    // constant!
+    if (Constant *C = dyn_cast<Constant>(Use)) {
+      C->replaceUsesOfWithOnConstant(Old, New);
+    } else {
+      Use->replaceUsesOfWith(Old, New);
+    }
+  }
+}
+
+
 // ConstantCreator - A class that is used to create constants by
 // ValueMap*.  This class should be partially specialized if there is
 // something strange that needs to be done to interface to the ctor for the
@@ -573,7 +593,7 @@
     C.push_back(cast<Constant>(getOperand(i)));
   Constant *New = ConstantArray::get(cast<ArrayType>(NewTy), C);
   if (New != this) {
-    replaceAllUsesWith(New);
+    ReplaceUsesOfWith(this, New);
     destroyConstant();    // This constant is now dead, destroy it.
   }
 }
@@ -642,7 +662,7 @@
     C.push_back(cast<Constant>(getOperand(i)));
   Constant *New = ConstantStruct::get(cast<StructType>(NewTy), C);
   if (New != this) {
-    replaceAllUsesWith(New);
+    ReplaceUsesOfWith(this, New);
     destroyConstant();    // This constant is now dead, destroy it.
   }
 }
@@ -683,7 +703,7 @@
   // Make everyone now use a constant of the new type...
   Constant *New = ConstantPointerNull::get(cast<PointerType>(NewTy));
   if (New != this) {
-    replaceAllUsesWith(New);
+    ReplaceUsesOfWith(this, New);
     
     // This constant is now dead, destroy it.
     destroyConstant();
@@ -836,7 +856,7 @@
     New = ConstantExpr::getGetElementPtr(getOperand(0), C);
   }
   if (New != this) {
-    replaceAllUsesWith(New);
+    ReplaceUsesOfWith(this, New);
     destroyConstant();    // This constant is now dead, destroy it.
   }
 }