Add vmov between floating point registers to ARM assembler.

src/IceInstARM32.cpp

Index: src/IceInstARM32.cpp
diff --git a/src/IceInstARM32.cpp b/src/IceInstARM32.cpp
index 86edd1d76be55c327f7cf4ee7ec1b7a3b44ecac5..0b66b95d779b0b32021aaf1abea50c5008ee6a4c 100644
--- a/src/IceInstARM32.cpp
+++ b/src/IceInstARM32.cpp
@@ -1158,19 +1158,29 @@ void InstARM32Mov::emitIASScalarVFPMove(const Cfg *Func) const {
   switch (Dest->getType()) {
   default:
     assert(false && "Do not know how to emit scalar FP move for type.");
-    return;
+    break;
   case IceType_f32:
-    if (const auto *FpImm = llvm::dyn_cast<OperandARM32FlexFpImm>(Src0)) {
+    if (llvm::isa<Variable>(Src0)) {

[Jim Stichnoth, 2016/01/27 22:10:49]

Are vmovss and vmovdd always going to have a Variable as their second argument? 
If so, I would change their declarations from Operand to Variable in that
parameter.

[Karl, 2016/01/27 22:58:09]

Done.

+      Asm->vmovss(Dest, Src0, getPredicate());
+      return;
+    } else if (const auto *FpImm =
+                   llvm::dyn_cast<OperandARM32FlexFpImm>(Src0)) {
       Asm->vmovs(Dest, FpImm, getPredicate());
       return;
     }
-    break;
+    assert(!Asm->needsTextFixup());
+    return;
   case IceType_f64:
-    if (const auto *FpImm = llvm::dyn_cast<OperandARM32FlexFpImm>(Src0)) {
+    if (llvm::isa<Variable>(Src0)) {
+      Asm->vmovdd(Dest, Src0, getPredicate());
+      return;
+    } else if (const auto *FpImm =
+                   llvm::dyn_cast<OperandARM32FlexFpImm>(Src0)) {
       Asm->vmovd(Dest, FpImm, getPredicate());
       return;
     }
-    break;
+    assert(!Asm->needsTextFixup());
+    return;
   }
   // TODO(kschimpf) Handle register to register move.
   Asm->setNeedsTextFixup();