Add APInt interfaces to APFloat (allows directly

access to bits).  Use them in place of float and
double interfaces where appropriate.
First bits of x86 long double constants handling 
(untested, probably does not work).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41858 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 19 insertions, 16 deletions

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 32f81d38f2..2050d23ad7 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -3800,7 +3800,8 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
       default: assert(0 && "Unknown FP type");
       case MVT::f32:
         if (!AfterLegalize || TLI.isTypeLegal(MVT::i32)) {
-          Tmp = DAG.getConstant(FloatToBits(CFP->getValueAPF().convertToFloat()), MVT::i32);
+          Tmp = DAG.getConstant((uint32_t)*CFP->getValueAPF().
+                              convertToAPInt().getRawData(), MVT::i32);
           return DAG.getStore(Chain, Tmp, Ptr, ST->getSrcValue(),
                               ST->getSrcValueOffset(), ST->isVolatile(),
                               ST->getAlignment());
@@ -3808,7 +3809,8 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
         break;
       case MVT::f64:
         if (!AfterLegalize || TLI.isTypeLegal(MVT::i64)) {
-          Tmp = DAG.getConstant(DoubleToBits(CFP->getValueAPF().convertToDouble()), MVT::i64);
+          Tmp = DAG.getConstant(*CFP->getValueAPF().convertToAPInt().
+                                  getRawData(), MVT::i64);
           return DAG.getStore(Chain, Tmp, Ptr, ST->getSrcValue(),
                               ST->getSrcValueOffset(), ST->isVolatile(),
                               ST->getAlignment());
@@ -3816,7 +3818,7 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
           // Many FP stores are not make apparent until after legalize, e.g. for
           // argument passing.  Since this is so common, custom legalize the
           // 64-bit integer store into two 32-bit stores.
-          uint64_t Val = DoubleToBits(CFP->getValueAPF().convertToDouble());
+          uint64_t Val = *CFP->getValueAPF().convertToAPInt().getRawData();
           SDOperand Lo = DAG.getConstant(Val & 0xFFFFFFFF, MVT::i32);
           SDOperand Hi = DAG.getConstant(Val >> 32, MVT::i32);
           if (!TLI.isLittleEndian()) std::swap(Lo, Hi);
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 31e29470e8..d7eb85bd8f 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -491,8 +491,9 @@ static SDOperand ExpandConstantFP(ConstantFPSDNode *CFP, bool UseCP,
   if (!UseCP) {
     const APFloat& Val = LLVMC->getValueAPF();
     return isDouble
-      ? DAG.getConstant(DoubleToBits(Val.convertToDouble()), MVT::i64)
-      : DAG.getConstant(FloatToBits(Val.convertToFloat()), MVT::i32);
+      ? DAG.getConstant(*Val.convertToAPInt().getRawData(), MVT::i64)
+      : DAG.getConstant((uint32_t )*Val.convertToAPInt().getRawData(), 
+                        MVT::i32);
   }
 
   if (isDouble && CFP->isValueValidForType(MVT::f32, CFP->getValueAPF()) &&
@@ -1980,12 +1981,13 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
       // together.
       if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(ST->getValue())) {
         if (CFP->getValueType(0) == MVT::f32) {
-          Tmp3 = DAG.getConstant(FloatToBits(CFP->getValueAPF().
-                                             convertToFloat()), MVT::i32);
+          Tmp3 = DAG.getConstant((uint32_t)*CFP->getValueAPF().
+                                          convertToAPInt().getRawData(),
+                                  MVT::i32);
         } else {
           assert(CFP->getValueType(0) == MVT::f64 && "Unknown FP type!");
-          Tmp3 = DAG.getConstant(DoubleToBits(CFP->getValueAPF().
-                                              convertToDouble()), MVT::i64);
+          Tmp3 = DAG.getConstant(*CFP->getValueAPF().convertToAPInt().
+                                   getRawData(), MVT::i64);
         }
         Result = DAG.getStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
                               SVOffset, isVolatile, Alignment);
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 01ec5c968a..85a76f436b 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -109,13 +109,12 @@ bool ISD::isBuildVectorAllOnes(const SDNode *N) {
   } else if (isa<ConstantFPSDNode>(NotZero)) {
     MVT::ValueType VT = NotZero.getValueType();
     if (VT== MVT::f64) {
-      if (DoubleToBits(cast<ConstantFPSDNode>(NotZero)->
-                       getValueAPF().convertToDouble()) !=
-          (uint64_t)-1)
+      if (*((cast<ConstantFPSDNode>(NotZero)->getValueAPF().
+                  convertToAPInt().getRawData())) != (uint64_t)-1)
         return false;
     } else {
-      if (FloatToBits(cast<ConstantFPSDNode>(NotZero)->
-                      getValueAPF().convertToFloat()) !=
+      if ((uint32_t)*cast<ConstantFPSDNode>(NotZero)->
+                      getValueAPF().convertToAPInt().getRawData() != 
           (uint32_t)-1)
         return false;
     }
@@ -1698,9 +1697,9 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
     }
     case ISD::BIT_CONVERT:
       if (VT == MVT::i32 && C->getValueType(0) == MVT::f32)
-        return getConstant(FloatToBits(V.convertToFloat()), VT);
+        return getConstant((uint32_t)*V.convertToAPInt().getRawData(), VT);
       else if (VT == MVT::i64 && C->getValueType(0) == MVT::f64)
-        return getConstant(DoubleToBits(V.convertToDouble()), VT);
+        return getConstant(*V.convertToAPInt().getRawData(), VT);
       break;
     }
   }