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3f23d4b8c3
tryLatency compares two sched candidates. For the top zone it prefers the one with lesser depth, but only if that depth is greater than the total latency of the instructions we've already scheduled -- otherwise its latency would be hidden and there would be no stall. Unfortunately it only tests the depth of one of the candidates. This can lead to situations where the TopDepthReduce heuristic does not kick in, but a lower priority heuristic chooses the other candidate, whose depth *is* greater than the already scheduled latency, which causes a stall. The fix is to apply the heuristic if the depth of *either* candidate is greater than the already scheduled latency. All this also applies to the BotHeightReduce heuristic in the bottom zone. Differential Revision: https://reviews.llvm.org/D72392
159 lines
6.2 KiB
LLVM
159 lines
6.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -march=amdgcn -mcpu=tahiti -verify-machineinstrs | FileCheck %s -enable-var-scope -check-prefixes=GCN,SI
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; RUN: llc < %s -march=amdgcn -mcpu=fiji -verify-machineinstrs | FileCheck %s -enable-var-scope -check-prefixes=GCN,VI
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; Make sure high constant 0 isn't pointlessly materialized
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define i16 @trunc_bitcast_i64_lshr_32_i16(i64 %bar) {
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; GCN-LABEL: trunc_bitcast_i64_lshr_32_i16:
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; GCN: ; %bb.0:
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; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; GCN-NEXT: v_mov_b32_e32 v0, v1
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; GCN-NEXT: s_setpc_b64 s[30:31]
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%srl = lshr i64 %bar, 32
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%trunc = trunc i64 %srl to i16
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ret i16 %trunc
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}
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define i32 @trunc_bitcast_i64_lshr_32_i32(i64 %bar) {
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; GCN-LABEL: trunc_bitcast_i64_lshr_32_i32:
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; GCN: ; %bb.0:
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; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; GCN-NEXT: v_mov_b32_e32 v0, v1
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; GCN-NEXT: s_setpc_b64 s[30:31]
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%srl = lshr i64 %bar, 32
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%trunc = trunc i64 %srl to i32
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ret i32 %trunc
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}
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define i16 @trunc_bitcast_v2i32_to_i16(<2 x i32> %bar) {
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; SI-LABEL: trunc_bitcast_v2i32_to_i16:
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; SI: ; %bb.0:
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; SI-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; SI-NEXT: s_mov_b32 s7, 0xf000
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; SI-NEXT: s_mov_b32 s6, -1
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; SI-NEXT: buffer_load_dword v0, off, s[4:7], 0
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; SI-NEXT: s_waitcnt vmcnt(0)
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; SI-NEXT: v_add_i32_e32 v0, vcc, 4, v0
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; SI-NEXT: s_setpc_b64 s[30:31]
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;
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; VI-LABEL: trunc_bitcast_v2i32_to_i16:
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; VI: ; %bb.0:
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; VI-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; VI-NEXT: flat_load_dword v0, v[0:1]
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; VI-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
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; VI-NEXT: v_add_u16_e32 v0, 4, v0
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; VI-NEXT: s_setpc_b64 s[30:31]
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%load0 = load i32, i32 addrspace(1)* undef
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%load1 = load i32, i32 addrspace(1)* null
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%insert.0 = insertelement <2 x i32> undef, i32 %load0, i32 0
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%insert.1 = insertelement <2 x i32> %insert.0, i32 99, i32 1
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%bc = bitcast <2 x i32> %insert.1 to i64
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%trunc = trunc i64 %bc to i16
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%add = add i16 %trunc, 4
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ret i16 %add
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}
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; Make sure there's no crash if the source vector type is FP
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define i16 @trunc_bitcast_v2f32_to_i16(<2 x float> %bar) {
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; SI-LABEL: trunc_bitcast_v2f32_to_i16:
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; SI: ; %bb.0:
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; SI-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; SI-NEXT: s_mov_b32 s7, 0xf000
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; SI-NEXT: s_mov_b32 s6, -1
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; SI-NEXT: buffer_load_dword v0, off, s[4:7], 0
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; SI-NEXT: s_waitcnt vmcnt(0)
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; SI-NEXT: v_add_i32_e32 v0, vcc, 4, v0
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; SI-NEXT: s_setpc_b64 s[30:31]
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;
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; VI-LABEL: trunc_bitcast_v2f32_to_i16:
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; VI: ; %bb.0:
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; VI-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; VI-NEXT: flat_load_dword v0, v[0:1]
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; VI-NEXT: s_waitcnt vmcnt(0) lgkmcnt(0)
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; VI-NEXT: v_add_u16_e32 v0, 4, v0
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; VI-NEXT: s_setpc_b64 s[30:31]
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%load0 = load float, float addrspace(1)* undef
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%load1 = load float, float addrspace(1)* null
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%insert.0 = insertelement <2 x float> undef, float %load0, i32 0
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%insert.1 = insertelement <2 x float> %insert.0, float 4.0, i32 1
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%bc = bitcast <2 x float> %insert.1 to i64
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%trunc = trunc i64 %bc to i16
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%add = add i16 %trunc, 4
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ret i16 %add
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}
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define amdgpu_kernel void @truncate_high_elt_extract_vector(<2 x i16> addrspace(1)* nocapture readonly %arg, <2 x i16> addrspace(1)* nocapture readonly %arg1, <2 x i16> addrspace(1)* nocapture %arg2) local_unnamed_addr {
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; SI-LABEL: truncate_high_elt_extract_vector:
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; SI: ; %bb.0: ; %bb
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; SI-NEXT: s_load_dwordx4 s[4:7], s[0:1], 0x9
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; SI-NEXT: s_load_dwordx2 s[0:1], s[0:1], 0xd
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; SI-NEXT: s_mov_b32 s3, 0xf000
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; SI-NEXT: s_mov_b32 s2, -1
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: s_load_dword s4, s[4:5], 0x0
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; SI-NEXT: s_load_dword s5, s[6:7], 0x0
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: s_sext_i32_i16 s4, s4
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; SI-NEXT: s_sext_i32_i16 s5, s5
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; SI-NEXT: v_mov_b32_e32 v0, s4
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; SI-NEXT: v_mul_i32_i24_e32 v0, s5, v0
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; SI-NEXT: v_lshrrev_b32_e32 v0, 16, v0
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; SI-NEXT: buffer_store_dword v0, off, s[0:3], 0
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; SI-NEXT: s_endpgm
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;
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; VI-LABEL: truncate_high_elt_extract_vector:
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; VI: ; %bb.0: ; %bb
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; VI-NEXT: s_load_dwordx4 s[4:7], s[0:1], 0x24
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; VI-NEXT: s_load_dwordx2 s[0:1], s[0:1], 0x34
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; VI-NEXT: s_waitcnt lgkmcnt(0)
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; VI-NEXT: s_load_dword s2, s[4:5], 0x0
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; VI-NEXT: s_load_dword s3, s[6:7], 0x0
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; VI-NEXT: v_mov_b32_e32 v0, s0
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; VI-NEXT: v_mov_b32_e32 v1, s1
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; VI-NEXT: s_waitcnt lgkmcnt(0)
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; VI-NEXT: s_sext_i32_i16 s0, s2
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; VI-NEXT: s_sext_i32_i16 s1, s3
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; VI-NEXT: v_mov_b32_e32 v2, s0
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; VI-NEXT: v_mul_i32_i24_e32 v2, s1, v2
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; VI-NEXT: v_lshrrev_b32_e32 v2, 16, v2
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; VI-NEXT: flat_store_dword v[0:1], v2
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; VI-NEXT: s_endpgm
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bb:
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%tmp = getelementptr inbounds <2 x i16>, <2 x i16> addrspace(1)* %arg, i64 undef
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%tmp3 = load <2 x i16>, <2 x i16> addrspace(1)* %tmp, align 4
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%tmp4 = getelementptr inbounds <2 x i16>, <2 x i16> addrspace(1)* %arg1, i64 undef
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%tmp5 = load <2 x i16>, <2 x i16> addrspace(1)* %tmp4, align 4
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%tmp6 = sext <2 x i16> %tmp3 to <2 x i32>
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%tmp7 = sext <2 x i16> %tmp5 to <2 x i32>
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%tmp8 = extractelement <2 x i32> %tmp6, i64 0
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%tmp9 = extractelement <2 x i32> %tmp7, i64 0
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%tmp10 = mul nsw i32 %tmp9, %tmp8
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%tmp11 = insertelement <2 x i32> undef, i32 %tmp10, i32 0
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%tmp12 = insertelement <2 x i32> %tmp11, i32 undef, i32 1
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%tmp13 = lshr <2 x i32> %tmp12, <i32 16, i32 16>
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%tmp14 = trunc <2 x i32> %tmp13 to <2 x i16>
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%tmp15 = getelementptr inbounds <2 x i16>, <2 x i16> addrspace(1)* %arg2, i64 undef
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store <2 x i16> %tmp14, <2 x i16> addrspace(1)* %tmp15, align 4
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ret void
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}
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define <2 x i16> @trunc_v2i64_arg_to_v2i16(<2 x i64> %arg0) #0 {
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; SI-LABEL: trunc_v2i64_arg_to_v2i16:
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; SI: ; %bb.0:
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; SI-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; SI-NEXT: v_lshlrev_b32_e32 v1, 16, v2
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; SI-NEXT: v_and_b32_e32 v0, 0xffff, v0
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; SI-NEXT: v_or_b32_e32 v0, v0, v1
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; SI-NEXT: v_lshrrev_b32_e32 v1, 16, v0
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; SI-NEXT: s_setpc_b64 s[30:31]
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;
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; VI-LABEL: trunc_v2i64_arg_to_v2i16:
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; VI: ; %bb.0:
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; VI-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; VI-NEXT: v_lshlrev_b32_e32 v1, 16, v2
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; VI-NEXT: v_or_b32_sdwa v0, v0, v1 dst_sel:DWORD dst_unused:UNUSED_PAD src0_sel:WORD_0 src1_sel:DWORD
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; VI-NEXT: s_setpc_b64 s[30:31]
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%trunc = trunc <2 x i64> %arg0 to <2 x i16>
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ret <2 x i16> %trunc
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}
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