28 lines
960 B
LLVM
28 lines
960 B
LLVM
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
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; There was an infinite loop in DAGCombiner from a target build_vector
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; combine and a generic insert_vector_elt combine.
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; GCN-LABEL: {{^}}combine_loop:
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; GCN: flat_load_ushort
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; GCN: flat_store_short
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; GCN: v_lshlrev_b32_e32 v{{[0-9]+}}, 16,
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define amdgpu_kernel void @combine_loop(i16* %arg) #0 {
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bb:
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br label %bb1
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bb1:
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%tmp = phi <2 x i16> [ <i16 15360, i16 15360>, %bb ], [ %tmp5, %bb1 ]
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%tmp2 = phi half [ 0xH0000, %bb ], [ %tmp8, %bb1 ]
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%tmp3 = load volatile half, half* null, align 536870912
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%tmp4 = bitcast half %tmp3 to i16
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%tmp5 = insertelement <2 x i16> <i16 0, i16 undef>, i16 %tmp4, i32 1
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%tmp6 = bitcast i16* %arg to half*
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store volatile half %tmp2, half* %tmp6, align 2
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%tmp7 = bitcast <2 x i16> %tmp to <2 x half>
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%tmp8 = extractelement <2 x half> %tmp7, i32 0
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br label %bb1
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}
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attributes #0 = { nounwind }
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