[llvm-commits] [llvm] r63830 - /llvm/branches/Apple/Dib/lib/Target/X86/X86ISelLowering.cpp

[Bill Wendling]

Author: void
Date: Wed Feb  4 22:41:57 2009
New Revision: 63830

URL: http://llvm.org/viewvc/llvm-project?rev=63830&view=rev
Log:
Pull r63702 into Dib:

Fixes a case where we generate an incorrect mask for pshfhw in the presence of
undefs and incorrectly determining if we have punpckldq.

Modified:
    llvm/branches/Apple/Dib/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/branches/Apple/Dib/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Dib/lib/Target/X86/X86ISelLowering.cpp?rev=63830&r1=63829&r2=63830&view=diff

==============================================================================
--- llvm/branches/Apple/Dib/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/branches/Apple/Dib/lib/Target/X86/X86ISelLowering.cpp Wed Feb  4 22:41:57 2009
@@ -2308,7 +2308,7 @@
     if (!isUndefOrEqual(BitI, j))
       return false;
     if (V2IsSplat) {
-      if (isUndefOrEqual(BitI1, NumElts))
+      if (!isUndefOrEqual(BitI1, NumElts))
         return false;
     } else {
       if (!isUndefOrEqual(BitI1, j + NumElts))
@@ -2643,9 +2643,10 @@
   for (unsigned i = 7; i >= 4; --i) {
     unsigned Val = 0;
     SDValue Arg = N->getOperand(i);
-    if (Arg.getOpcode() != ISD::UNDEF)
+    if (Arg.getOpcode() != ISD::UNDEF) {
       Val = cast<ConstantSDNode>(Arg)->getZExtValue();
-    Mask |= (Val - 4);
+      Mask |= (Val - 4);
+    }
     if (i != 4)
       Mask <<= 2;
   }
@@ -4160,10 +4161,10 @@
     // new vector_shuffle with the corrected mask.
     SDValue NewMask = NormalizeMask(PermMask, DAG);
     if (NewMask.getNode() != PermMask.getNode()) {
-      if (X86::isUNPCKLMask(PermMask.getNode(), true)) {
+      if (X86::isUNPCKLMask(NewMask.getNode(), true)) {
         SDValue NewMask = getUnpacklMask(NumElems, DAG);
         return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
-      } else if (X86::isUNPCKHMask(PermMask.getNode(), true)) {
+      } else if (X86::isUNPCKHMask(NewMask.getNode(), true)) {
         SDValue NewMask = getUnpackhMask(NumElems, DAG);
         return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
       }