commit c4dd3c3b519aa2c2ed26ce03a4b1fbb992efeaca
author Dale Johannesen <dalej@apple.com> Fri Aug 31 23:34:27 2007 +0000
committer Dale Johannesen <dalej@apple.com> Fri Aug 31 23:34:27 2007 +0000
tree ac0eb685f19e086a27ab59d3fe86795fec4fc977
parent fadfb5b102a3b8619ada0c53091c3b0acbde432b

Add mod, copysign, abs operations to APFloat.
Implement some constant folding in SelectionDAG and
DAGCombiner using APFloat.  Remove double versions
of constructor and getValue from ConstantFPSDNode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41664 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/DAGCombiner.cpp

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 0514bc1..dae4e21 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -410,9 +410,11 @@
   assert(Depth <= 6 && "GetNegatedExpression doesn't match isNegatibleForFree");
   switch (Op.getOpcode()) {
   default: assert(0 && "Unknown code");
-  case ISD::ConstantFP:
-    return DAG.getConstantFP(-cast<ConstantFPSDNode>(Op)->getValue(),
-                             Op.getValueType());
+  case ISD::ConstantFP: {
+    APFloat V = cast<ConstantFPSDNode>(Op)->getValueAPF();
+    V.changeSign();
+    return DAG.getConstantFP(V, Op.getValueType());
+  }
   case ISD::FADD:
     // FIXME: determine better conditions for this xform.
     assert(UnsafeFPMath);
@@ -432,7 +434,7 @@
 
     // -(0-B) -> B
     if (ConstantFPSDNode *N0CFP = dyn_cast<ConstantFPSDNode>(Op.getOperand(0)))
-      if (N0CFP->getValue() == 0.0)
+      if (N0CFP->getValueAPF().isZero())
         return Op.getOperand(1);
     
     // -(A-B) -> B-A
@@ -3080,7 +3082,7 @@
   if (N0CFP && N1CFP)
     return DAG.getNode(ISD::FSUB, VT, N0, N1);
   // fold (0-B) -> -B
-  if (UnsafeFPMath && N0CFP && N0CFP->getValue() == 0.0) {
+  if (UnsafeFPMath && N0CFP && N0CFP->getValueAPF().isZero()) {
     if (isNegatibleForFree(N1))
       return GetNegatedExpression(N1, DAG);
     return DAG.getNode(ISD::FNEG, VT, N1);
@@ -3304,7 +3306,7 @@
   
   // fold (fp_round_inreg c1fp) -> c1fp
   if (N0CFP) {
-    SDOperand Round = DAG.getConstantFP(N0CFP->getValue(), EVT);
+    SDOperand Round = DAG.getConstantFP(N0CFP->getValueAPF(), EVT);
     return DAG.getNode(ISD::FP_EXTEND, VT, Round);
   }
   return SDOperand();
@@ -4207,7 +4209,7 @@
         if ((RHSOp.getOpcode() == ISD::Constant &&
              cast<ConstantSDNode>(RHSOp.Val)->isNullValue()) ||
             (RHSOp.getOpcode() == ISD::ConstantFP &&
-             !cast<ConstantFPSDNode>(RHSOp.Val)->getValue()))
+             cast<ConstantFPSDNode>(RHSOp.Val)->getValueAPF().isZero()))
           break;
       }
       Ops.push_back(DAG.getNode(N->getOpcode(), EltType, LHSOp, RHSOp));