[llvm-commits] [llvm] r59150 - /llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp

[Dale Johannesen]

Author: johannes
Date: Wed Nov 12 12:38:44 2008
New Revision: 59150

URL: http://llvm.org/viewvc/llvm-project?rev=59150&view=rev
Log:
Fix unsigned char->ppcf128 conversion.


Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp?rev=59150&r1=59149&r2=59150&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp Wed Nov 12 12:38:44 2008
@@ -919,17 +919,22 @@
   MVT NVT = TLI.getTypeToTransformTo(VT);
   SDValue Src = N->getOperand(0);
   MVT SrcVT = Src.getValueType();
+  bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
 
   // First do an SINT_TO_FP, whether the original was signed or unsigned.
+  // When promoting partial word types to i32 we must honor the signedness,
+  // though.
   if (SrcVT.bitsLE(MVT::i32)) {
     // The integer can be represented exactly in an f64.
-    Src = DAG.getNode(ISD::SIGN_EXTEND, MVT::i32, Src);
+    Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, 
+                      MVT::i32, Src);
     Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
     Hi = DAG.getNode(ISD::SINT_TO_FP, NVT, Src);
   } else {
     RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
     if (SrcVT.bitsLE(MVT::i64)) {
-      Src = DAG.getNode(ISD::SIGN_EXTEND, MVT::i64, Src);
+      Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, 
+                        MVT::i64, Src);
       LC = RTLIB::SINTTOFP_I64_PPCF128;
     } else if (SrcVT.bitsLE(MVT::i128)) {
       Src = DAG.getNode(ISD::SIGN_EXTEND, MVT::i128, Src);
@@ -943,7 +948,7 @@
     Lo = Hi.getOperand(0); Hi = Hi.getOperand(1);
   }
 
-  if (N->getOpcode() == ISD::SINT_TO_FP)
+  if (isSigned)
     return;
 
   // Unsigned - fix up the SINT_TO_FP value just calculated.