1; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
2
3; GatherAllAliases gives up on trying to analyze cases where the
4; pointer may have been loaded from an aliased store, so make sure
5; that this works and allows moving the stores to a better chain to
6; allow them to be merged merged when it's clear the pointer is loaded
7; from constant/invariant memory.
8
9; GCN-LABEL: {{^}}test_merge_store_constant_i16_invariant_global_pointer_load:
10; GCN: buffer_load_dwordx2 [[PTR:v\[[0-9]+:[0-9]+\]]],
11; GCN: v_mov_b32_e32 [[K:v[0-9]+]], 0x1c8007b
12; GCN: buffer_store_dword [[K]], [[PTR]]
13define void @test_merge_store_constant_i16_invariant_global_pointer_load(i16 addrspace(1)* addrspace(1)* dereferenceable(4096) nonnull %in) #0 {
14  %ptr = load i16 addrspace(1)*, i16 addrspace(1)* addrspace(1)* %in, !invariant.load !0
15  %ptr.1 = getelementptr i16, i16 addrspace(1)* %ptr, i64 1
16  store i16 123, i16 addrspace(1)* %ptr, align 4
17  store i16 456, i16 addrspace(1)* %ptr.1
18  ret void
19}
20
21; GCN-LABEL: {{^}}test_merge_store_constant_i16_invariant_constant_pointer_load:
22; GCN: s_load_dwordx2 s{{\[}}[[SPTR_LO:[0-9]+]]:[[SPTR_HI:[0-9]+]]{{\]}}
23; GCN: v_mov_b32_e32 [[K:v[0-9]+]], 0x1c8007b
24; GCN: buffer_store_dword [[K]], s{{\[}}[[SPTR_LO]]:
25define void @test_merge_store_constant_i16_invariant_constant_pointer_load(i16 addrspace(1)* addrspace(2)* dereferenceable(4096) nonnull %in) #0 {
26  %ptr = load i16 addrspace(1)*, i16 addrspace(1)* addrspace(2)* %in, !invariant.load !0
27  %ptr.1 = getelementptr i16, i16 addrspace(1)* %ptr, i64 1
28  store i16 123, i16 addrspace(1)* %ptr, align 4
29  store i16 456, i16 addrspace(1)* %ptr.1
30  ret void
31}
32
33!0 = !{}
34
35attributes #0 = { nounwind }