AVX-512: cvtusi2ss/d intrinsics.

Change builtin function name and signature ( add third parameter - rounding mode ).
Added tests for intrinsics.

Differential Revision: http://reviews.llvm.org/D10473

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239888 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Instrumentation/MemorySanitizer.cpp

@@ -2022,6 +2022,8 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     Value *CopyOp, *ConvertOp;
 
     switch (I.getNumArgOperands()) {
+    case 3:
+      assert(isa<ConstantInt>(I.getArgOperand(2)) && "Invalid rounding mode");
     case 2:
       CopyOp = I.getArgOperand(0);
       ConvertOp = I.getArgOperand(1);