Fix a regression on X86, where FP values can be promoted too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22822 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 44553afa3c3626c12ffacf52ce6e2da09f0234b5..7303ee2add2035304999bac38004d559e0e7be47 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -991,7 +991,10 @@ CopyValueToVirtualRegister(SelectionDAGLowering &SDL, Value *V, unsigned Reg) {
     return DAG.getCopyToReg(SDL.getRoot(), Reg, Op);
   } else if (SrcVT < DestVT) {
     // The src value is promoted to the register.
-    Op = DAG.getNode(ISD::ZERO_EXTEND, DestVT, Op);
+    if (MVT::isFloatingPoint(SrcVT))
+      Op = DAG.getNode(ISD::FP_EXTEND, DestVT, Op);
+    else
+      Op = DAG.getNode(ISD::ZERO_EXTEND, DestVT, Op);
     return DAG.getCopyToReg(SDL.getRoot(), Reg, Op);
   } else  {
     // The src value is expanded into multiple registers.