Fix bug in DAGBuilder for getelementptr with expanded vector.

Replacing the usage of MVT with EVT in case the vector type is expanded.
Differential Revision: https://reviews.llvm.org/D23306

llvm-svn: 278913

llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

@@ -3329,8 +3329,9 @@ void SelectionDAGBuilder::visitGetElementPtr(const User &I) {
         if (CI->isZero())
           continue;
         APInt Offs = ElementSize * CI->getValue().sextOrTrunc(PtrSize);
+        LLVMContext &Context = *DAG.getContext();
         SDValue OffsVal = VectorWidth ?
-          DAG.getConstant(Offs, dl, MVT::getVectorVT(PtrTy, VectorWidth)) :
+          DAG.getConstant(Offs, dl, EVT::getVectorVT(Context, PtrTy, VectorWidth)) :
           DAG.getConstant(Offs, dl, PtrTy);
 
         // In an inbouds GEP with an offset that is nonnegative even when

llvm/test/CodeGen/X86/gep-expanded-vector.ll

@@ -0,0 +1,24 @@
+; RUN: llc < %s -O2 -mattr=avx512f -mtriple=x86_64-unknown | FileCheck %s
+
+%struct.S1 = type { %struct.S1*, %struct.S1* }
+
+define %struct.S1** @malloc_init_state(<64 x %struct.S1**> %tmp, i32 %ind) {
+entry:
+  %Vec = getelementptr inbounds %struct.S1*, <64 x %struct.S1**> %tmp , i64 2
+  %ptr = extractelement <64 x %struct.S1**> %Vec, i32 %ind
+  ret %struct.S1** %ptr
+}
+
+; CHECK: .LCPI0_0:
+; CHECK: .quad 16
+; CHECK: vpbroadcastq    .LCPI0_0(%rip), [[Z1:%zmm[0-9]]]
+; CHECK-NEXT: vpaddq  [[Z1]], [[Z2:%zmm[0-9]]], [[Z2]]
+; CHECK-NEXT: vpaddq  [[Z1]], [[Z3:%zmm[0-9]]], [[Z3]]
+; CHECK-NEXT: vpaddq  [[Z1]], [[Z4:%zmm[0-9]]], [[Z4]]
+; CHECK-NEXT: vpaddq  [[Z1]], [[Z5:%zmm[0-9]]], [[Z5]]
+; CHECK-NEXT: vpaddq  [[Z1]], [[Z6:%zmm[0-9]]], [[Z6]]
+; CHECK-NEXT: vpaddq  [[Z1]], [[Z7:%zmm[0-9]]], [[Z7]]
+; CHECK-NEXT: vpaddq  [[Z1]], [[Z8:%zmm[0-9]]], [[Z8]]
+; CHECK-NEXT: vpaddq  [[Z1]], [[Z9:%zmm[0-9]]], [[Z9]]
+
+