f2c164c815
SIInsertWaitcnts inserts waitcnt instructions to resolve data dependencies. The GFX10+ vscnt (VMEM store count) counter is never used in this way. It is only used to resolve memory dependencies, and that is handled by SIMemoryLegalizer. Hence there is no need to conservatively wait for vscnt to be 0 on function entry and before returns. Differential Revision: https://reviews.llvm.org/D153537
137 lines
7.4 KiB
LLVM
137 lines
7.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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; RUN: llc -march=amdgcn -mcpu=gfx1010 < %s | FileCheck %s -check-prefix=ISA
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; RUN: llc -march=amdgcn -mcpu=gfx1010 -stop-before=si-fix-sgpr-copies < %s | FileCheck %s -check-prefix=MIR
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define void @f(i32 %arg, ptr %ptr) {
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; ISA-LABEL: f:
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; ISA: ; %bb.0: ; %bb
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; ISA-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; ISA-NEXT: s_mov_b64 s[4:5], 0
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; ISA-NEXT: v_cmp_gt_i32_e32 vcc_lo, 1, v0
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; ISA-NEXT: s_load_dwordx2 s[4:5], s[4:5], 0x0
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; ISA-NEXT: v_mov_b32_e32 v7, 0
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; ISA-NEXT: s_waitcnt lgkmcnt(0)
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; ISA-NEXT: s_lshr_b32 s6, s5, 1
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; ISA-NEXT: s_lshr_b32 s7, 1, s4
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; ISA-NEXT: s_cmp_lg_u32 s4, 0
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; ISA-NEXT: s_cselect_b32 s4, -1, 0
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; ISA-NEXT: v_cndmask_b32_e64 v0, 0, 1.0, s4
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; ISA-NEXT: s_and_b32 s4, s4, exec_lo
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; ISA-NEXT: s_cselect_b32 s4, s6, 0
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; ISA-NEXT: s_cselect_b32 s6, s7, 0
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; ISA-NEXT: s_cselect_b32 s5, s5, 0
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; ISA-NEXT: v_cvt_f32_i32_e32 v3, s4
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; ISA-NEXT: v_cvt_f32_ubyte0_e32 v4, s6
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; ISA-NEXT: v_cvt_f32_i32_e32 v5, s5
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; ISA-NEXT: s_mov_b32 s4, 0
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; ISA-NEXT: .LBB0_1: ; %bb14
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; ISA-NEXT: ; =>This Inner Loop Header: Depth=1
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; ISA-NEXT: v_mov_b32_e32 v6, v7
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; ISA-NEXT: s_and_b32 s5, exec_lo, vcc_lo
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; ISA-NEXT: s_or_b32 s4, s5, s4
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; ISA-NEXT: v_add_f32_e32 v7, v6, v0
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; ISA-NEXT: v_add_f32_e64 v7, v7, |v3|
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; ISA-NEXT: v_add_f32_e32 v7, v7, v4
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; ISA-NEXT: v_add_f32_e32 v7, v7, v5
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; ISA-NEXT: s_andn2_b32 exec_lo, exec_lo, s4
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; ISA-NEXT: s_cbranch_execnz .LBB0_1
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; ISA-NEXT: ; %bb.2: ; %bb21
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; ISA-NEXT: s_or_b32 exec_lo, exec_lo, s4
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; ISA-NEXT: flat_store_dword v[1:2], v6
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; ISA-NEXT: s_waitcnt lgkmcnt(0)
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; ISA-NEXT: s_setpc_b64 s[30:31]
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; MIR-LABEL: name: f
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; MIR: bb.0.bb:
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; MIR-NEXT: successors: %bb.1(0x80000000)
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; MIR-NEXT: liveins: $vgpr0, $vgpr1, $vgpr2
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; MIR-NEXT: {{ $}}
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; MIR-NEXT: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr2
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; MIR-NEXT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
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; MIR-NEXT: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr0
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; MIR-NEXT: [[REG_SEQUENCE:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[COPY1]], %subreg.sub0, [[COPY]], %subreg.sub1
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; MIR-NEXT: [[COPY3:%[0-9]+]]:vreg_64 = COPY [[REG_SEQUENCE]]
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; MIR-NEXT: [[S_MOV_B64_:%[0-9]+]]:sreg_64 = S_MOV_B64 0
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; MIR-NEXT: [[S_LOAD_DWORDX2_IMM:%[0-9]+]]:sreg_64_xexec = S_LOAD_DWORDX2_IMM killed [[S_MOV_B64_]], 0, 0 :: (invariant load (s64) from `ptr addrspace(4) null`, align 4294967296, addrspace 4)
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; MIR-NEXT: [[COPY4:%[0-9]+]]:sreg_32 = COPY [[S_LOAD_DWORDX2_IMM]].sub1
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; MIR-NEXT: [[COPY5:%[0-9]+]]:sreg_32 = COPY [[S_LOAD_DWORDX2_IMM]].sub0
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; MIR-NEXT: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 1
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; MIR-NEXT: [[S_LSHR_B32_:%[0-9]+]]:sreg_32 = S_LSHR_B32 [[COPY4]], [[S_MOV_B32_]], implicit-def dead $scc
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; MIR-NEXT: [[S_LSHR_B32_1:%[0-9]+]]:sreg_32 = S_LSHR_B32 [[S_MOV_B32_]], [[COPY5]], implicit-def dead $scc
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; MIR-NEXT: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 0
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; MIR-NEXT: S_CMP_LG_U32 [[COPY5]], [[S_MOV_B32_1]], implicit-def $scc
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; MIR-NEXT: [[COPY6:%[0-9]+]]:sreg_32_xm0_xexec = COPY $scc
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; MIR-NEXT: $scc = COPY [[COPY6]]
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; MIR-NEXT: [[S_CSELECT_B32_:%[0-9]+]]:sreg_32 = S_CSELECT_B32 killed [[S_LSHR_B32_]], [[S_MOV_B32_1]], implicit $scc
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; MIR-NEXT: [[V_CVT_F32_I32_e64_:%[0-9]+]]:vgpr_32 = V_CVT_F32_I32_e64 killed [[S_CSELECT_B32_]], 0, 0, implicit $mode, implicit $exec
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; MIR-NEXT: [[COPY7:%[0-9]+]]:sgpr_32 = COPY [[V_CVT_F32_I32_e64_]]
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; MIR-NEXT: [[S_MOV_B32_2:%[0-9]+]]:sgpr_32 = S_MOV_B32 1065353216
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; MIR-NEXT: [[S_MOV_B32_3:%[0-9]+]]:sgpr_32 = S_MOV_B32 0
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; MIR-NEXT: [[COPY8:%[0-9]+]]:vgpr_32 = COPY killed [[S_MOV_B32_2]]
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; MIR-NEXT: [[V_CNDMASK_B32_e64_:%[0-9]+]]:vgpr_32 = V_CNDMASK_B32_e64 0, [[S_MOV_B32_3]], 0, [[COPY8]], [[COPY6]], implicit $exec
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; MIR-NEXT: [[COPY9:%[0-9]+]]:sgpr_32 = COPY [[V_CNDMASK_B32_e64_]]
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; MIR-NEXT: $scc = COPY [[COPY6]]
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; MIR-NEXT: [[S_CSELECT_B32_1:%[0-9]+]]:sreg_32 = S_CSELECT_B32 killed [[S_LSHR_B32_1]], [[S_MOV_B32_1]], implicit $scc
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; MIR-NEXT: [[V_CVT_F32_UBYTE0_e64_:%[0-9]+]]:vgpr_32 = V_CVT_F32_UBYTE0_e64 killed [[S_CSELECT_B32_1]], 0, 0, implicit $exec
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; MIR-NEXT: [[COPY10:%[0-9]+]]:sgpr_32 = COPY [[V_CVT_F32_UBYTE0_e64_]]
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; MIR-NEXT: $scc = COPY [[COPY6]]
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; MIR-NEXT: [[S_CSELECT_B32_2:%[0-9]+]]:sreg_32 = S_CSELECT_B32 [[COPY4]], [[S_MOV_B32_1]], implicit $scc
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; MIR-NEXT: [[V_CVT_F32_I32_e64_1:%[0-9]+]]:vgpr_32 = V_CVT_F32_I32_e64 killed [[S_CSELECT_B32_2]], 0, 0, implicit $mode, implicit $exec
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; MIR-NEXT: [[COPY11:%[0-9]+]]:sgpr_32 = COPY [[V_CVT_F32_I32_e64_1]]
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; MIR-NEXT: [[V_CMP_LT_I32_e64_:%[0-9]+]]:sreg_32 = V_CMP_LT_I32_e64 [[COPY2]], [[S_MOV_B32_]], implicit $exec
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; MIR-NEXT: [[COPY12:%[0-9]+]]:vreg_1 = COPY [[V_CMP_LT_I32_e64_]]
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; MIR-NEXT: {{ $}}
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; MIR-NEXT: bb.1.bb14:
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; MIR-NEXT: successors: %bb.2(0x04000000), %bb.1(0x7c000000)
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; MIR-NEXT: {{ $}}
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; MIR-NEXT: [[PHI:%[0-9]+]]:sreg_32 = PHI [[S_MOV_B32_1]], %bb.0, %7, %bb.1
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; MIR-NEXT: [[PHI1:%[0-9]+]]:sgpr_32 = PHI [[S_MOV_B32_3]], %bb.0, %8, %bb.1
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; MIR-NEXT: [[COPY13:%[0-9]+]]:sreg_32 = COPY [[COPY12]]
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; MIR-NEXT: [[SI_IF_BREAK:%[0-9]+]]:sreg_32 = SI_IF_BREAK [[COPY13]], [[PHI]], implicit-def dead $scc
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; MIR-NEXT: [[V_ADD_F32_e64_:%[0-9]+]]:vgpr_32 = nofpexcept V_ADD_F32_e64 0, [[PHI1]], 0, [[COPY9]], 0, 0, implicit $mode, implicit $exec
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; MIR-NEXT: [[V_ADD_F32_e64_1:%[0-9]+]]:vgpr_32 = nofpexcept V_ADD_F32_e64 0, killed [[V_ADD_F32_e64_]], 2, [[COPY7]], 0, 0, implicit $mode, implicit $exec
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; MIR-NEXT: [[V_ADD_F32_e64_2:%[0-9]+]]:vgpr_32 = nofpexcept V_ADD_F32_e64 0, killed [[V_ADD_F32_e64_1]], 0, [[COPY10]], 0, 0, implicit $mode, implicit $exec
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; MIR-NEXT: [[V_ADD_F32_e64_3:%[0-9]+]]:vgpr_32 = nofpexcept V_ADD_F32_e64 0, killed [[V_ADD_F32_e64_2]], 0, [[COPY11]], 0, 0, implicit $mode, implicit $exec
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; MIR-NEXT: [[COPY14:%[0-9]+]]:sgpr_32 = COPY [[V_ADD_F32_e64_3]]
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; MIR-NEXT: SI_LOOP [[SI_IF_BREAK]], %bb.1, implicit-def dead $exec, implicit-def dead $scc, implicit $exec
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; MIR-NEXT: S_BRANCH %bb.2
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; MIR-NEXT: {{ $}}
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; MIR-NEXT: bb.2.bb21:
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; MIR-NEXT: [[PHI2:%[0-9]+]]:vgpr_32 = PHI [[PHI1]], %bb.1
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; MIR-NEXT: [[PHI3:%[0-9]+]]:sreg_32 = PHI [[SI_IF_BREAK]], %bb.1
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; MIR-NEXT: SI_END_CF [[PHI3]], implicit-def dead $exec, implicit-def dead $scc, implicit $exec
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; MIR-NEXT: FLAT_STORE_DWORD [[COPY3]], [[PHI2]], 0, 0, implicit $exec, implicit $flat_scr :: (store (s32) into %ir.ptr)
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; MIR-NEXT: SI_RETURN
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bb:
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%i = load <2 x i32>, ptr addrspace(4) null, align 4294967296
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%i1 = extractelement <2 x i32> %i, i64 1
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%i2 = extractelement <2 x i32> %i, i64 0
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%i3 = lshr i32 %i1, 1
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%i4 = icmp ne i32 %i2, 0
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%i5 = select i1 %i4, i32 %i3, i32 0
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%i6 = sitofp i32 %i5 to float
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%i7 = call float @llvm.fabs.f32(float %i6)
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%i8 = uitofp i1 %i4 to float
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%i9 = lshr i32 1, %i2
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%i10 = select i1 %i4, i32 %i9, i32 0
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%i11 = sitofp i32 %i10 to float
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%i12 = select i1 %i4, i32 %i1, i32 0
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%i13 = sitofp i32 %i12 to float
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br label %bb14
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bb14:
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%i15 = phi float [ 0.0, %bb ], [ %i19, %bb14 ]
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%i16 = fadd float %i15, %i8
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%i17 = fadd float %i16, %i7
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%i18 = fadd float %i17, %i11
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%i19 = fadd float %i18, %i13
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%i20 = icmp sgt i32 %arg, 0
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br i1 %i20, label %bb14, label %bb21
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bb21:
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store float %i15, ptr %ptr, align 4
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ret void
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}
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declare float @llvm.fabs.f32(float)
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