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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -enable-var-scope --check-prefix=GCN %s
; Test combine to reduce the width of a 64-bit shift to 32-bit if
; truncated to 16-bit.
define i16 @trunc_srl_i64_16_to_i16(i64 %x) {
; GCN-LABEL: trunc_srl_i64_16_to_i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_lshrrev_b32_e32 v0, 16, v0
; GCN-NEXT: s_setpc_b64 s[30:31]
%shift = lshr i64 %x, 16
%trunc = trunc i64 %shift to i16
ret i16 %trunc
}
define i16 @trunc_srl_i64_17_to_i16(i64 %x) {
; GCN-LABEL: trunc_srl_i64_17_to_i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_lshrrev_b64 v[0:1], 17, v[0:1]
; GCN-NEXT: s_setpc_b64 s[30:31]
%shift = lshr i64 %x, 17
%trunc = trunc i64 %shift to i16
ret i16 %trunc
}
define i15 @trunc_srl_i55_16_to_i15(i55 %x) {
; GCN-LABEL: trunc_srl_i55_16_to_i15:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_lshrrev_b32_e32 v0, 15, v0
; GCN-NEXT: v_add_u16_e32 v0, 4, v0
; GCN-NEXT: s_setpc_b64 s[30:31]
%shift = lshr i55 %x, 15
%trunc = trunc i55 %shift to i15
%add = add i15 %trunc, 4
ret i15 %add
}
define i16 @trunc_sra_i64_16_to_i16(i64 %x) {
; GCN-LABEL: trunc_sra_i64_16_to_i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_lshrrev_b32_e32 v0, 16, v0
; GCN-NEXT: s_setpc_b64 s[30:31]
%shift = ashr i64 %x, 16
%trunc = trunc i64 %shift to i16
ret i16 %trunc
}
define i16 @trunc_sra_i64_17_to_i16(i64 %x) {
; GCN-LABEL: trunc_sra_i64_17_to_i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_lshrrev_b64 v[0:1], 17, v[0:1]
; GCN-NEXT: s_setpc_b64 s[30:31]
%shift = ashr i64 %x, 17
%trunc = trunc i64 %shift to i16
ret i16 %trunc
}
define i16 @trunc_shl_i64_16_to_i16(i64 %x) {
; GCN-LABEL: trunc_shl_i64_16_to_i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_mov_b32_e32 v0, 0
; GCN-NEXT: s_setpc_b64 s[30:31]
%shift = shl i64 %x, 16
%trunc = trunc i64 %shift to i16
ret i16 %trunc
}
define i16 @trunc_shl_i64_17_to_i16(i64 %x) {
; GCN-LABEL: trunc_shl_i64_17_to_i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_mov_b32_e32 v0, 0
; GCN-NEXT: s_setpc_b64 s[30:31]
%shift = shl i64 %x, 17
%trunc = trunc i64 %shift to i16
ret i16 %trunc
}
define <2 x i16> @trunc_srl_v2i64_16_to_v2i16(<2 x i64> %x) {
; GCN-LABEL: trunc_srl_v2i64_16_to_v2i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: s_mov_b32 s4, 0x7060302
; GCN-NEXT: v_perm_b32 v0, v2, v0, s4
; GCN-NEXT: s_setpc_b64 s[30:31]
%shift = lshr <2 x i64> %x, <i64 16, i64 16>
%trunc = trunc <2 x i64> %shift to <2 x i16>
ret <2 x i16> %trunc
}
define amdgpu_kernel void @s_trunc_srl_i64_16_to_i16(i64 %x) {
; GCN-LABEL: s_trunc_srl_i64_16_to_i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_load_dword s0, s[0:1], 0x24
; GCN-NEXT: s_waitcnt lgkmcnt(0)
; GCN-NEXT: s_lshr_b32 s0, s0, 16
; GCN-NEXT: s_or_b32 s0, s0, 4
; GCN-NEXT: v_mov_b32_e32 v0, s0
; GCN-NEXT: global_store_short v[0:1], v0, off
; GCN-NEXT: s_endpgm
%shift = lshr i64 %x, 16
%trunc = trunc i64 %shift to i16
%add = or i16 %trunc, 4
store i16 %add, ptr addrspace(1) undef
ret void
}
define i16 @trunc_srl_i64_var_mask15_to_i16(i64 %x, i64 %amt) {
; GCN-LABEL: trunc_srl_i64_var_mask15_to_i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_and_b32_e32 v1, 15, v2
; GCN-NEXT: v_lshrrev_b32_e32 v0, v1, v0
; GCN-NEXT: s_setpc_b64 s[30:31]
%amt.masked = and i64 %amt, 15
%shift = lshr i64 %x, %amt.masked
%trunc = trunc i64 %shift to i16
ret i16 %trunc
}
define i16 @trunc_srl_i64_var_mask16_to_i16(i64 %x, i64 %amt) {
; GCN-LABEL: trunc_srl_i64_var_mask16_to_i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_and_b32_e32 v1, 16, v2
; GCN-NEXT: v_lshrrev_b32_e32 v0, v1, v0
; GCN-NEXT: s_setpc_b64 s[30:31]
%amt.masked = and i64 %amt, 16
%shift = lshr i64 %x, %amt.masked
%trunc = trunc i64 %shift to i16
ret i16 %trunc
}
define i16 @trunc_srl_i64_var_mask31_to_i16(i64 %x, i64 %amt) {
; GCN-LABEL: trunc_srl_i64_var_mask31_to_i16:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_and_b32_e32 v2, 31, v2
; GCN-NEXT: v_lshrrev_b64 v[0:1], v2, v[0:1]
; GCN-NEXT: s_setpc_b64 s[30:31]
%amt.masked = and i64 %amt, 31
%shift = lshr i64 %x, %amt.masked
%trunc = trunc i64 %shift to i16
ret i16 %trunc
}
define i32 @trunc_srl_i64_25_to_i26(i64 %x) {
; GCN-LABEL: trunc_srl_i64_25_to_i26:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_and_b32_e32 v0, 0xa000000, v0
; GCN-NEXT: v_lshrrev_b32_e32 v0, 25, v0
; GCN-NEXT: v_add_u32_e32 v0, 55, v0
; GCN-NEXT: s_setpc_b64 s[30:31]
%value.knownbits2 = and i64 %x, 167772160 ; 0xA000000
%shift = lshr i64 %value.knownbits2, 25
%trunc = trunc i64 %shift to i26
%add = add i26 %trunc, 55
%ext = zext i26 %add to i32
ret i32 %ext
}
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