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clang-p2996/llvm/test/CodeGen/AMDGPU/mad_uint24.ll
Nirav Dave fe59e14031 [DAGCombine] Prune unnused nodes. 
Summary:
Nodes that have no uses are eventually pruned when they are selected
from the worklist. Record nodes newly added to the worklist or DAG and
perform pruning after every combine attempt.

Reviewers: efriedma, RKSimon, craig.topper, spatel, jyknight

Reviewed By: jyknight

Subscribers: jdoerfert, jyknight, nemanjai, jvesely, nhaehnle, javed.absar, hiraditya, jsji, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58070

llvm-svn: 357283
2019-03-29 17:35:56 +00:00

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; 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
}
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