llvm-project/llvm/test/CodeGen/AMDGPU/mad_uint24.ll

; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s --check-prefix=EG --check-prefix=FUNC
; RUN: llc < %s -march=r600 -mcpu=cayman | FileCheck %s --check-prefix=EG --check-prefix=FUNC
; RUN: llc < %s -march=amdgcn -verify-machineinstrs | FileCheck %s --check-prefix=SI --check-prefix=FUNC --check-prefix=GCN --check-prefix=GCN1
; RUN: llc < %s -march=amdgcn -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs | FileCheck %s --check-prefix=VI --check-prefix=FUNC --check-prefix=GCN --check-prefix=GCN2
; RUN: llc < %s -march=amdgcn -mcpu=fiji -mattr=-flat-for-global -verify-machineinstrs | FileCheck %s --check-prefix=VI --check-prefix=FUNC --check-prefix=GCN --check-prefix=GCN2

declare i32 @llvm.r600.read.tidig.x() nounwind readnone

; FUNC-LABEL: {{^}}u32_mad24:
; EG: MULADD_UINT24
; SI: v_mad_u32_u24
; VI: v_mad_u32_u24

define amdgpu_kernel void @u32_mad24(i32 addrspace(1)* %out, i32 %a, i32 %b, i32 %c) {
entry:
  %0 = shl i32 %a, 8
  %a_24 = lshr i32 %0, 8
  %1 = shl i32 %b, 8
  %b_24 = lshr i32 %1, 8
  %2 = mul i32 %a_24, %b_24
  %3 = add i32 %2, %c
  store i32 %3, i32 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}i16_mad24:
; The order of A and B does not matter.
; EG: MULADD_UINT24 {{[* ]*}}T{{[0-9]}}.[[MAD_CHAN:[XYZW]]]
; The result must be sign-extended
; EG: BFE_INT {{[* ]*}}T{{[0-9]\.[XYZW]}}, PV.[[MAD_CHAN]], 0.0, literal.x
; EG: 16
; FIXME: Should be using scalar instructions here.
; GCN1: v_mad_u32_u24 [[MAD:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; GCN1: v_bfe_i32 v{{[0-9]}}, [[MAD]], 0, 16
; GCN2:	s_mul_i32 [[MUL:s[0-9]]], {{[s][0-9], [s][0-9]}}
; GCN2:	s_add_i32 [[MAD:s[0-9]]], [[MUL]], s{{[0-9]}}
; GCN2:	s_sext_i32_i16 s0, [[MAD]]
; GCN2:	v_mov_b32_e32 v0, s0
define amdgpu_kernel void @i16_mad24(i32 addrspace(1)* %out, i16 %a, i16 %b, i16 %c) {
entry:
  %0 = mul i16 %a, %b
  %1 = add i16 %0, %c
  %2 = sext i16 %1 to i32
  store i32 %2, i32 addrspace(1)* %out
  ret void
}

; FIXME: Need to handle non-uniform case for function below (load without gep).
; FUNC-LABEL: {{^}}i8_mad24:
; EG: MULADD_UINT24 {{[* ]*}}T{{[0-9]}}.[[MAD_CHAN:[XYZW]]]
; The result must be sign-extended
; EG: BFE_INT {{[* ]*}}T{{[0-9]\.[XYZW]}}, PV.[[MAD_CHAN]], 0.0, literal.x
; EG: 8
; GCN1: v_mad_u32_u24 [[MUL:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; GCN1: v_bfe_i32 v{{[0-9]}}, [[MUL]], 0, 8
; GCN2:	s_mul_i32 [[MUL:s[0-9]]], {{[s][0-9], [s][0-9]}}
; GCN2:	s_add_i32 [[MAD:s[0-9]]], [[MUL]], s{{[0-9]}}
; GCN2:	s_sext_i32_i8 s0, [[MAD]]
; GCN2:	v_mov_b32_e32 v0, s0
define amdgpu_kernel void @i8_mad24(i32 addrspace(1)* %out, i8 %a, i8 %b, i8 %c) {
entry:
  %0 = mul i8 %a, %b
  %1 = add i8 %0, %c
  %2 = sext i8 %1 to i32
  store i32 %2, i32 addrspace(1)* %out
  ret void
}

; This tests for a bug where the mad_u24 pattern matcher would call
; SimplifyDemandedBits on the first operand of the mul instruction
; assuming that the pattern would be matched to a 24-bit mad.  This
; led to some instructions being incorrectly erased when the entire
; 24-bit mad pattern wasn't being matched.

; Check that the select instruction is not deleted.
; FUNC-LABEL: {{^}}i24_i32_i32_mad:
; EG: CNDE_INT
; SI: v_cndmask
define amdgpu_kernel void @i24_i32_i32_mad(i32 addrspace(1)* %out, i32 %a, i32 %b, i32 %c, i32 %d) {
entry:
  %0 = ashr i32 %a, 8
  %1 = icmp ne i32 %c, 0
  %2 = select i1 %1, i32 %0, i32 34
  %3 = mul i32 %2, %c
  %4 = add i32 %3, %d
  store i32 %4, i32 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}extra_and:
; SI-NOT: v_and
; SI: v_mad_u32_u24
; SI: v_mad_u32_u24
define amdgpu_kernel void @extra_and(i32 addrspace(1)* %arg, i32 %arg2, i32 %arg3) {
bb:
  br label %bb4

bb4:                                              ; preds = %bb4, %bb
  %tmp = phi i32 [ 0, %bb ], [ %tmp13, %bb4 ]
  %tmp5 = phi i32 [ 0, %bb ], [ %tmp13, %bb4 ]
  %tmp6 = phi i32 [ 0, %bb ], [ %tmp15, %bb4 ]
  %tmp7 = phi i32 [ 0, %bb ], [ %tmp15, %bb4 ]
  %tmp8 = and i32 %tmp7, 16777215
  %tmp9 = and i32 %tmp6, 16777215
  %tmp10 = and i32 %tmp5, 16777215
  %tmp11 = and i32 %tmp, 16777215
  %tmp12 = mul i32 %tmp8, %tmp11
  %tmp13 = add i32 %arg2, %tmp12
  %tmp14 = mul i32 %tmp9, %tmp11
  %tmp15 = add i32 %arg3, %tmp14
  %tmp16 = add nuw nsw i32 %tmp13, %tmp15
  %tmp17 = icmp eq i32 %tmp16, 8
  br i1 %tmp17, label %bb18, label %bb4

bb18:                                             ; preds = %bb4
  store i32 %tmp16, i32 addrspace(1)* %arg
  ret void
}

; FUNC-LABEL: {{^}}dont_remove_shift
; SI: v_lshr
; SI: v_mad_u32_u24
; SI: v_mad_u32_u24
define amdgpu_kernel void @dont_remove_shift(i32 addrspace(1)* %arg, i32 %arg2, i32 %arg3) {
bb:
  br label %bb4

bb4:                                              ; preds = %bb4, %bb
  %tmp = phi i32 [ 0, %bb ], [ %tmp13, %bb4 ]
  %tmp5 = phi i32 [ 0, %bb ], [ %tmp13, %bb4 ]
  %tmp6 = phi i32 [ 0, %bb ], [ %tmp15, %bb4 ]
  %tmp7 = phi i32 [ 0, %bb ], [ %tmp15, %bb4 ]
  %tmp8 = lshr i32 %tmp7, 8
  %tmp9 = lshr i32 %tmp6, 8
  %tmp10 = lshr i32 %tmp5, 8
  %tmp11 = lshr i32 %tmp, 8
  %tmp12 = mul i32 %tmp8, %tmp11
  %tmp13 = add i32 %arg2, %tmp12
  %tmp14 = mul i32 %tmp9, %tmp11
  %tmp15 = add i32 %arg3, %tmp14
  %tmp16 = add nuw nsw i32 %tmp13, %tmp15
  %tmp17 = icmp eq i32 %tmp16, 8
  br i1 %tmp17, label %bb18, label %bb4

bb18:                                             ; preds = %bb4
  store i32 %tmp16, i32 addrspace(1)* %arg
  ret void
}

; FUNC-LABEL: {{^}}i8_mad_sat_16:
; EG: MULADD_UINT24 {{[* ]*}}T{{[0-9]}}.[[MAD_CHAN:[XYZW]]]
; The result must be sign-extended
; EG: BFE_INT {{[* ]*}}T{{[0-9]\.[XYZW]}}, PV.[[MAD_CHAN]], 0.0, literal.x
; EG: 8
; SI: v_mad_u32_u24 [[MAD:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; VI: v_mad_u16 [[MAD:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; GCN: v_bfe_i32 [[EXT:v[0-9]]], [[MAD]], 0, 16
; GCN: v_med3_i32 v{{[0-9]}}, [[EXT]],
define amdgpu_kernel void @i8_mad_sat_16(i8 addrspace(1)* %out, i8 addrspace(1)* %in0, i8 addrspace(1)* %in1, i8 addrspace(1)* %in2, i64 addrspace(5)* %idx) {
entry:
  %retval.0.i = load i64, i64 addrspace(5)* %idx
  %arrayidx = getelementptr inbounds i8, i8 addrspace(1)* %in0, i64 %retval.0.i
  %arrayidx2 = getelementptr inbounds i8, i8 addrspace(1)* %in1, i64 %retval.0.i
  %arrayidx4 = getelementptr inbounds i8, i8 addrspace(1)* %in2, i64 %retval.0.i
  %l1 = load i8, i8 addrspace(1)* %arrayidx, align 1
  %l2 = load i8, i8 addrspace(1)* %arrayidx2, align 1
  %l3 = load i8, i8 addrspace(1)* %arrayidx4, align 1
  %conv1.i = sext i8 %l1 to i16
  %conv3.i = sext i8 %l2 to i16
  %conv5.i = sext i8 %l3 to i16
  %mul.i.i.i = mul nsw i16 %conv3.i, %conv1.i
  %add.i.i = add i16 %mul.i.i.i, %conv5.i
  %c4 = icmp sgt i16 %add.i.i, -128
  %cond.i.i = select i1 %c4, i16 %add.i.i, i16 -128
  %c5 = icmp slt i16 %cond.i.i, 127
  %cond13.i.i = select i1 %c5, i16 %cond.i.i, i16 127
  %conv8.i = trunc i16 %cond13.i.i to i8
  %arrayidx7 = getelementptr inbounds i8, i8 addrspace(1)* %out, i64 %retval.0.i
  store i8 %conv8.i, i8 addrspace(1)* %arrayidx7, align 1
  ret void
}

; FUNC-LABEL: {{^}}i8_mad_32:
; EG: MULADD_UINT24 {{[* ]*}}T{{[0-9]}}.[[MAD_CHAN:[XYZW]]]
; The result must be sign-extended
; EG: BFE_INT {{[* ]*}}T{{[0-9]\.[XYZW]}}, PV.[[MAD_CHAN]], 0.0, literal.x
; EG: 8
; SI: v_mad_u32_u24 [[MAD:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; VI: v_mad_u16 [[MAD:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; GCN: v_bfe_i32 [[EXT:v[0-9]]], [[MAD]], 0, 16
define amdgpu_kernel void @i8_mad_32(i32 addrspace(1)* %out, i8 addrspace(1)* %a, i8 addrspace(1)* %b, i8 addrspace(1)* %c, i64 addrspace(5)* %idx) {
entry:
  %retval.0.i = load i64, i64 addrspace(5)* %idx
  %arrayidx = getelementptr inbounds i8, i8 addrspace(1)* %a, i64 %retval.0.i
  %arrayidx2 = getelementptr inbounds i8, i8 addrspace(1)* %b, i64 %retval.0.i
  %arrayidx4 = getelementptr inbounds i8, i8 addrspace(1)* %c, i64 %retval.0.i
  %la = load i8, i8 addrspace(1)* %arrayidx, align 1
  %lb = load i8, i8 addrspace(1)* %arrayidx2, align 1
  %lc = load i8, i8 addrspace(1)* %arrayidx4, align 1
  %exta = sext i8 %la to i16
  %extb = sext i8 %lb to i16
  %extc = sext i8 %lc to i16
  %mul = mul i16 %exta, %extb
  %mad = add i16 %mul, %extc
  %mad_ext = sext i16 %mad to i32
  store i32 %mad_ext, i32 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}i8_mad_64:
; EG: MULADD_UINT24 {{[* ]*}}T{{[0-9]}}.[[MAD_CHAN:[XYZW]]]
; The result must be sign-extended
; EG: BFE_INT {{[* ]*}}T{{[0-9]\.[XYZW]}}, PV.[[MAD_CHAN]], 0.0, literal.x
; EG: 8
; SI: v_mad_u32_u24 [[MAD:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; VI: v_mad_u16 [[MAD:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; GCN: v_bfe_i32 [[EXT:v[0-9]]], [[MAD]], 0, 16
define amdgpu_kernel void @i8_mad_64(i64 addrspace(1)* %out, i8 addrspace(1)* %a, i8 addrspace(1)* %b, i8 addrspace(1)* %c, i64 addrspace(5)* %idx) {
entry:
  %retval.0.i = load i64, i64 addrspace(5)* %idx
  %arrayidx = getelementptr inbounds i8, i8 addrspace(1)* %a, i64 %retval.0.i
  %arrayidx2 = getelementptr inbounds i8, i8 addrspace(1)* %b, i64 %retval.0.i
  %arrayidx4 = getelementptr inbounds i8, i8 addrspace(1)* %c, i64 %retval.0.i
  %la = load i8, i8 addrspace(1)* %arrayidx, align 1
  %lb = load i8, i8 addrspace(1)* %arrayidx2, align 1
  %lc = load i8, i8 addrspace(1)* %arrayidx4, align 1
  %exta = sext i8 %la to i16
  %extb = sext i8 %lb to i16
  %extc = sext i8 %lc to i16
  %mul = mul i16 %exta, %extb
  %mad = add i16 %mul, %extc
  %mad_ext = sext i16 %mad to i64
  store i64 %mad_ext, i64 addrspace(1)* %out
  ret void
}

; The ands are asserting the high bits are 0. SimplifyDemandedBits on
; the adds would remove the ands before the target combine on the mul
; had a chance to form mul24. The mul combine would then see
; extractelement with no known bits and fail. All of the mul/add
; combos in this loop should form v_mad_u32_u24.

; FUNC-LABEL: {{^}}mad24_known_bits_destroyed:
; GCN: v_mad_u32_u24
; GCN: v_mad_u32_u24
; GCN: v_mad_u32_u24
; GCN: v_mad_u32_u24
; GCN: v_mad_u32_u24
; GCN: v_mad_u32_u24
; GCN: v_mad_u32_u24
; GCN: v_mad_u32_u24
define void @mad24_known_bits_destroyed(i32 %arg, <4 x i32> %arg1, <4 x i32> %arg2, <4 x i32> %arg3, i32 %arg4, i32 %arg5, i32 %arg6, i32 addrspace(1)* %arg7, <4 x i32> addrspace(1)* %arg8) #0 {
bb:
  %tmp = and i32 %arg4, 16777215
  %tmp9 = extractelement <4 x i32> %arg1, i64 1
  %tmp10 = extractelement <4 x i32> %arg3, i64 1
  %tmp11 = and i32 %tmp9, 16777215
  %tmp12 = extractelement <4 x i32> %arg1, i64 2
  %tmp13 = extractelement <4 x i32> %arg3, i64 2
  %tmp14 = and i32 %tmp12, 16777215
  %tmp15 = extractelement <4 x i32> %arg1, i64 3
  %tmp16 = extractelement <4 x i32> %arg3, i64 3
  %tmp17 = and i32 %tmp15, 16777215
  br label %bb19

bb18:                                             ; preds = %bb19
  ret void

bb19:                                             ; preds = %bb19, %bb
  %tmp20 = phi i32 [ %arg, %bb ], [ %tmp40, %bb19 ]
  %tmp21 = phi i32 [ 0, %bb ], [ %tmp54, %bb19 ]
  %tmp22 = phi <4 x i32> [ %arg2, %bb ], [ %tmp53, %bb19 ]
  %tmp23 = and i32 %tmp20, 16777215
  %tmp24 = mul i32 %tmp23, %tmp
  %tmp25 = add i32 %tmp24, %arg5
  %tmp26 = extractelement <4 x i32> %tmp22, i64 1
  %tmp27 = and i32 %tmp26, 16777215
  %tmp28 = mul i32 %tmp27, %tmp11
  %tmp29 = add i32 %tmp28, %tmp10
  %tmp30 = extractelement <4 x i32> %tmp22, i64 2
  %tmp31 = and i32 %tmp30, 16777215
  %tmp32 = mul i32 %tmp31, %tmp14
  %tmp33 = add i32 %tmp32, %tmp13
  %tmp34 = extractelement <4 x i32> %tmp22, i64 3
  %tmp35 = and i32 %tmp34, 16777215
  %tmp36 = mul i32 %tmp35, %tmp17
  %tmp37 = add i32 %tmp36, %tmp16
  %tmp38 = and i32 %tmp25, 16777215
  %tmp39 = mul i32 %tmp38, %tmp
  %tmp40 = add i32 %tmp39, %arg5
  store i32 %tmp40, i32 addrspace(1)* %arg7
  %tmp41 = insertelement <4 x i32> undef, i32 %tmp40, i32 0
  %tmp42 = and i32 %tmp29, 16777215
  %tmp43 = mul i32 %tmp42, %tmp11
  %tmp44 = add i32 %tmp43, %tmp10
  %tmp45 = insertelement <4 x i32> %tmp41, i32 %tmp44, i32 1
  %tmp46 = and i32 %tmp33, 16777215
  %tmp47 = mul i32 %tmp46, %tmp14
  %tmp48 = add i32 %tmp47, %tmp13
  %tmp49 = insertelement <4 x i32> %tmp45, i32 %tmp48, i32 2
  %tmp50 = and i32 %tmp37, 16777215
  %tmp51 = mul i32 %tmp50, %tmp17
  %tmp52 = add i32 %tmp51, %tmp16
  %tmp53 = insertelement <4 x i32> %tmp49, i32 %tmp52, i32 3
  store <4 x i32> %tmp53, <4 x i32> addrspace(1)* %arg8
  %tmp54 = add nuw nsw i32 %tmp21, 1
  %tmp55 = icmp eq i32 %tmp54, %arg6
  br i1 %tmp55, label %bb18, label %bb19
}

attributes #0 = { norecurse nounwind }