Add "vmov.<dt> <Qd>, #<imm>" to integrated ARM assembler.

src/IceInstARM32.cpp

 //===- subzero/src/IceInstARM32.cpp - ARM32 instruction implementation ----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 1558 matching lines @@
     }
     break; // Error
   case IceType_v4i1:
   case IceType_v8i1:
   case IceType_v16i1:
   case IceType_v16i8:
   case IceType_v8i16:
   case IceType_v4i32:
   case IceType_v4f32:
     assert(CondARM32::isUnconditional(Cond) &&
-           "Moves on <4 x f32> must be unconditional!");
-    // Mov between different Src and Dest types is used for bitcasting vectors.
-    // We still want to make sure SrcTy is a vector type.
-    assert(isVectorType(SrcTy) && "Mov between vector and scalar.");
-    Asm->vorrq(Dest, Src0, Src0);
-    return;
+           "Moves on vector must be unconditional!");
+    if (isVectorType(SrcTy)) {
+      // Mov between different Src and Dest types is used for bitcasting
+      // vectors.  We still want to make sure SrcTy is a vector type.
+      Asm->vorrq(Dest, Src0, Src0);
+      return;
+    } else if (const auto *C = llvm::dyn_cast<ConstantInteger32>(Src0)) {
+      // Mov with constant argument, allowing the initializing all elements of
+      // the vector.
+      if (Asm->vmovqc(Dest, C))
+        return;
+    }
   }
   llvm::report_fatal_error("Mov: don't know how to move " +
                            typeStdString(SrcTy) + " to " +
                            typeStdString(DestTy));
 }
 
 void InstARM32Mov::dump(const Cfg *Func) const {
   if (!BuildDefs::dump())
     return;
   assert(getSrcSize() == 1 || getSrcSize() == 2);
@@ skipping 1192 matching lines @@
 
 template class InstARM32FourAddrGPR<InstARM32::Mla>;
 template class InstARM32FourAddrGPR<InstARM32::Mls>;
 
 template class InstARM32CmpLike<InstARM32::Cmn>;
 template class InstARM32CmpLike<InstARM32::Cmp>;
 template class InstARM32CmpLike<InstARM32::Tst>;
 
 } // end of namespace ARM32
 } // end of namespace Ice