llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-bitcast.mir

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# RUN: llc -march=amdgcn -run-pass=instruction-select -verify-machineinstrs -global-isel %s -o - | FileCheck %s -check-prefixes=GCN
--- |
define amdgpu_kernel void @bitcast(i32 addrspace(1)* %global0) {ret void}
...
---
name: bitcast
legalized: true
regBankSelected: true
# GCN-LABEL: name: bitcast
# GCN: [[A:%[0-9]+]]:vgpr_32 = COPY $vgpr0
# GCN: [[B:%[0-9]+]]:vreg_64 = COPY $vgpr3_vgpr4
# GCN: FLAT_STORE_DWORD [[B]], [[A]]
body: |
bb.0:
liveins: $sgpr0, $vgpr3_vgpr4
%0:vgpr(s32) = COPY $vgpr0
%1:vgpr(s64) = COPY $vgpr3_vgpr4
%2:vgpr(<2 x s16>) = G_BITCAST %0
%3:vgpr(s32) = G_BITCAST %2
G_STORE %3, %1 :: (store 4 into %ir.global0)
...
---