Fix PR18162 - Incorrect assertion assumed that the SDValue resno is z…

…ero.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196858 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/DAGCombiner.cpp

@@ -9859,7 +9859,7 @@ SDValue DAGCombiner::visitCONCAT_VECTORS(SDNode *N) {
   if (N->getNumOperands() == 2 &&
       N->getOperand(1)->getOpcode() == ISD::UNDEF) {
     SDValue In = N->getOperand(0);
-    assert(In->getValueType(0).isVector() && "Must concat vectors");
+    assert(In.getValueType().isVector() && "Must concat vectors");
 
     // Transform: concat_vectors(scalar, undef) -> scalar_to_vector(sclr).
     if (In->getOpcode() == ISD::BITCAST &&

test/CodeGen/X86/pr18162.ll

@@ -0,0 +1,27 @@
+; RUN: llc < %s
+
+; Make sure we are not crashing on this one.
+
+target triple = "x86_64-unknown-linux-gnu"
+
+%"Iterator" = type { i32* }
+
+declare { i64, <2 x float> } @Call() 
+declare { i64, <2 x float> }* @CallPtr() 
+
+define { i64, <2 x float> } @Foo(%"Iterator"* %this) {
+entry:
+  %retval = alloca i32
+  %this.addr = alloca %"Iterator"*
+  %this1 = load %"Iterator"** %this.addr
+  %bundle_ = getelementptr inbounds %"Iterator"* %this1, i32 0, i32 0
+  %0 = load i32** %bundle_
+  %1 = call { i64, <2 x float> } @Call()
+  %2 = call { i64, <2 x float> }* @CallPtr()
+  %3 = getelementptr { i64, <2 x float> }* %2, i32 0, i32 1
+  %4 = extractvalue { i64, <2 x float> } %1, 1
+  store <2 x float> %4, <2 x float>* %3
+  %5 = load { i64, <2 x float> }* %2
+  ret { i64, <2 x float> } %5
+}
+