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

[Chris Lattner]

Changes in directory llvm/lib/VMCore:

iOperators.cpp updated: 1.25 -> 1.26

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Log message:

Floating point negates are -0.0 - X, not 0.0 - X


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Diffs of the changes:  (+13 -5)

Index: llvm/lib/VMCore/iOperators.cpp
diff -u llvm/lib/VMCore/iOperators.cpp:1.25 llvm/lib/VMCore/iOperators.cpp:1.26
--- llvm/lib/VMCore/iOperators.cpp:1.25	Thu Nov 20 11:45:12 2003
+++ llvm/lib/VMCore/iOperators.cpp	Mon Feb  2 14:21:29 2004
@@ -78,9 +78,14 @@
 
 BinaryOperator *BinaryOperator::createNeg(Value *Op, const std::string &Name,
                                           Instruction *InsertBefore) {
-  return new BinaryOperator(Instruction::Sub,
-                            Constant::getNullValue(Op->getType()), Op,
-                            Op->getType(), Name, InsertBefore);
+  if (!Op->getType()->isFloatingPoint())
+    return new BinaryOperator(Instruction::Sub,
+                              Constant::getNullValue(Op->getType()), Op,
+                              Op->getType(), Name, InsertBefore);
+  else
+    return new BinaryOperator(Instruction::Sub,
+                              ConstantFP::get(Op->getType(), -0.0), Op,
+                              Op->getType(), Name, InsertBefore);
 }
 
 BinaryOperator *BinaryOperator::createNot(Value *Op, const std::string &Name,
@@ -98,8 +103,11 @@
 
 bool BinaryOperator::isNeg(const Value *V) {
   if (const BinaryOperator *Bop = dyn_cast<BinaryOperator>(V))
-    return Bop->getOpcode() == Instruction::Sub &&
-      Bop->getOperand(0) == Constant::getNullValue(Bop->getType());
+    if (Bop->getOpcode() == Instruction::Sub)
+      if (!V->getType()->isFloatingPoint())
+        return Bop->getOperand(0) == Constant::getNullValue(Bop->getType());
+      else
+        return Bop->getOperand(0) == ConstantFP::get(Bop->getType(), -0.0);
   return false;
 }