1; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s 2 3; There was an infinite loop in DAGCombiner from a target build_vector 4; combine and a generic insert_vector_elt combine. 5 6; GCN-LABEL: {{^}}combine_loop: 7; GCN: flat_load_short_d16_hi 8; GCN: flat_store_short 9define amdgpu_kernel void @combine_loop(ptr %arg) #0 { 10bb: 11 br label %bb1 12 13bb1: 14 %tmp = phi <2 x i16> [ <i16 15360, i16 15360>, %bb ], [ %tmp5, %bb1 ] 15 %tmp2 = phi half [ 0xH0000, %bb ], [ %tmp8, %bb1 ] 16 %tmp3 = load volatile half, ptr null, align 536870912 17 %tmp4 = bitcast half %tmp3 to i16 18 %tmp5 = insertelement <2 x i16> <i16 0, i16 undef>, i16 %tmp4, i32 1 19 store volatile half %tmp2, ptr %arg, align 2 20 %tmp7 = bitcast <2 x i16> %tmp to <2 x half> 21 %tmp8 = extractelement <2 x half> %tmp7, i32 0 22 br label %bb1 23} 24 25attributes #0 = { nounwind } 26