TheRock/rocm-libraries/shared/stinkytofu/tests/filecheck/insert_delay_alu.stir

# RUN: %stinkytofu-opt --arch gfx1250 %s --InsertDelayAluPass --print-output
#
# InsertDelayAluPass: insert s_delay_alu to avoid pipeline stalls on
# dependent ALU instructions.

#--- Basic VALU->VALU dependency: v_add writes v0, v_mul reads v0
# CHECK-LABEL: @valu_dep_1
# CHECK: v_add_f32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "VALU"
# CHECK-SAME: instid0Distance = 1
# CHECK: v_mul_f32

st.func @valu_dep_1() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}

#--- VALU dep 2: one independent VALU between producer and consumer
# CHECK-LABEL: @valu_dep_2
# CHECK: v_add_f32
# CHECK-NEXT: v_mov_b32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Distance = 2
# CHECK: v_mul_f32

st.func @valu_dep_2() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v5 = "st.v_mov_b32"(v6) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}

#--- VALU_DEP_3: three independent VALU between producer and consumer
# CHECK-LABEL: @valu_dep_3
# CHECK: v_add_f32
# CHECK: v_mov_b32
# CHECK: v_mov_b32
# CHECK: v_mov_b32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Distance = 4
# CHECK: v_mul_f32

st.func @valu_dep_3() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v5 = "st.v_mov_b32"(v6) { issueCycles = 1, latencyCycles = 5 }
  v7 = "st.v_mov_b32"(v8) { issueCycles = 1, latencyCycles = 5 }
  v9 = "st.v_mov_b32"(v10) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}

#--- VALU_DEP_4: four independent VALU between producer and consumer
# CHECK-LABEL: @valu_dep_4
# CHECK: v_add_f32
# CHECK: v_mov_b32
# CHECK: v_mov_b32
# CHECK: v_mov_b32
# CHECK: v_mov_b32
# CHECK-NOT: s_delay_alu
# CHECK: v_mul_f32

st.func @valu_dep_4() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v5 = "st.v_mov_b32"(v6) { issueCycles = 1, latencyCycles = 5 }
  v7 = "st.v_mov_b32"(v8) { issueCycles = 1, latencyCycles = 5 }
  v9 = "st.v_mov_b32"(v10) { issueCycles = 1, latencyCycles = 5 }
  v11 = "st.v_mov_b32"(v12) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}

#--- No delay needed: 5+ VALU instructions between producer and consumer
# CHECK-LABEL: @valu_no_delay_needed
# CHECK: v_add_f32
# CHECK-NOT: s_delay_alu
# CHECK: v_sub_f32

st.func @valu_no_delay_needed() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v10 = "st.v_mov_b32"(v11) { issueCycles = 1, latencyCycles = 5 }
  v12 = "st.v_mov_b32"(v13) { issueCycles = 1, latencyCycles = 5 }
  v14 = "st.v_mov_b32"(v15) { issueCycles = 1, latencyCycles = 5 }
  v16 = "st.v_mov_b32"(v17) { issueCycles = 1, latencyCycles = 5 }
  v18 = "st.v_mov_b32"(v19) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_sub_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}

#--- SALU cycle delay: s_add writes s0, s_mul reads s0
# CHECK-LABEL: @salu_cycle_1
# CHECK: s_add_u32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "SALU"
# CHECK-SAME: instid0Distance = 1
# CHECK: s_mul_i32

st.func @salu_cycle_1() {
^entry:
  s0 = "st.s_add_u32"(s1, s2) { issueCycles = 1, latencyCycles = 2 }
  s3 = "st.s_mul_i32"(s0, s4) { issueCycles = 1, latencyCycles = 2 }
}

#--- SALU multi-cycle: latency=3 (e.g. SFPU), consumer needs SALU_CYCLE_2
#    latency=3, advance by 1 -> SALUCycles=2 -> SALU_CYCLE_2.
# CHECK-LABEL: @salu_cycle_2
# CHECK: s_mul_hi_u32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "SALU"
# CHECK-SAME: instid0Distance = 2
# CHECK: s_add_u32

st.func @salu_cycle_2() {
^entry:
  s0 = "st.s_mul_hi_u32"(s1, s2) { issueCycles = 1, latencyCycles = 3 }
  s3 = "st.s_add_u32"(s0, s4) { issueCycles = 1, latencyCycles = 2 }
}

#--- Transcendental 32-bit: tracked as TRANS in scoreboard
# CHECK-LABEL: @trans32_dep_1
# CHECK: v_rcp_f32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "TRANS"
# CHECK-SAME: instid0Distance = 1
# CHECK: v_mul_f32

st.func @trans32_dep_1() {
^entry:
  v0 = "st.v_rcp_f32"(v1) { issueCycles = 1, latencyCycles = 8 }
  v3 = "st.v_mul_f32"(v0, v2) { issueCycles = 1, latencyCycles = 5 }
}

#--- TRANS32_DEP_2: two TRANS instructions before consumer
# CHECK-LABEL: @trans32_dep_2
# CHECK: v_rcp_f32
# CHECK: v_exp_f32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "TRANS"
# CHECK-SAME: instid0Distance = 2
# CHECK: v_mul_f32

st.func @trans32_dep_2() {
^entry:
  v0 = "st.v_rcp_f32"(v1) { issueCycles = 1, latencyCycles = 8 }
  v5 = "st.v_exp_f32"(v6) { issueCycles = 1, latencyCycles = 8 }
  v3 = "st.v_mul_f32"(v0, v2) { issueCycles = 1, latencyCycles = 5 }
}

#--- TRANS32_DEP_3: three TRANS instructions before consumer
# CHECK-LABEL: @trans32_dep_3
# CHECK: v_rcp_f32
# CHECK: v_exp_f32
# CHECK: v_log_f32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "TRANS"
# CHECK-SAME: instid0Distance = 3
# CHECK: v_mul_f32

st.func @trans32_dep_3() {
^entry:
  v0 = "st.v_rcp_f32"(v1) { issueCycles = 1, latencyCycles = 8 }
  v5 = "st.v_exp_f32"(v6) { issueCycles = 1, latencyCycles = 8 }
  v7 = "st.v_log_f32"(v8) { issueCycles = 1, latencyCycles = 8 }
  v3 = "st.v_mul_f32"(v0, v2) { issueCycles = 1, latencyCycles = 5 }
}

#--- TRANS scoreboard expired: 4 TRANS instructions -> oldest evicted, no delay
# CHECK-LABEL: @trans32_dep_expired
# CHECK: v_rcp_f32
# CHECK-NOT: s_delay_alu
# CHECK: v_mul_f32

st.func @trans32_dep_expired() {
^entry:
  v0 = "st.v_rcp_f32"(v1) { issueCycles = 1, latencyCycles = 8 }
  v5 = "st.v_exp_f32"(v6) { issueCycles = 1, latencyCycles = 8 }
  v7 = "st.v_log_f32"(v8) { issueCycles = 1, latencyCycles = 8 }
  v9 = "st.v_sqrt_f32"(v10) { issueCycles = 1, latencyCycles = 8 }
  v3 = "st.v_mul_f32"(v0, v2) { issueCycles = 1, latencyCycles = 5 }
}

#--- Transcendental 64-bit: tracked as VALU, not TRANS
# CHECK-LABEL: @trans64_as_valu
# CHECK: v_rcp_f64
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "VALU"
# CHECK-SAME: instid0Distance = 1
# CHECK: v_mul_f32

st.func @trans64_as_valu() {
^entry:
  v[0:1] = "st.v_rcp_f64"(v[2:3]) { issueCycles = 1, latencyCycles = 38 }
  v4 = "st.v_mul_f32"(v0, v5) { issueCycles = 1, latencyCycles = 5 }
}

#--- No dependency: consumer reads different register than producer writes
# CHECK-LABEL: @no_dependency
# CHECK: v_add_f32
# CHECK-NOT: s_delay_alu
# CHECK: v_mul_f32

st.func @no_dependency() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_mul_f32"(v4, v5) { issueCycles = 1, latencyCycles = 5 }
}

#--- Implicit registers not tracked: v_cmp writes vcc_lo, v_cndmask reads it.
# No s_delay_alu should be emitted because implicit registers (VCC, SCC, EXEC)
# are filtered by isAllocatableReg.
# CHECK-LABEL: @implicit_reg_not_tracked
# CHECK: v_cmp_eq_u32
# CHECK-NOT: s_delay_alu
# CHECK: v_cndmask_b32

st.func @implicit_reg_not_tracked() {
^entry:
  vcc_lo0 = "st.v_cmp_eq_u32"(v0, v1) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_cndmask_b32"(v4, v5, vcc_lo0) { issueCycles = 1, latencyCycles = 5 }
}

#--- Memory instruction clears VALU state: no delay after ds_load
# CHECK-LABEL: @mem_clears_valu_state
# CHECK: v_add_f32
# CHECK: ds_load_b32
# CHECK-NOT: s_delay_alu
# CHECK: v_mul_f32

st.func @mem_clears_valu_state() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v9 = "st.ds_load_b32"(v10) { issueCycles = 1, latencyCycles = 52, mod.ds = { na = 1, offset = 0, gds = false }, mod.memtoken = { tokens = [0] } }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}

#--- Memory op clears delay state: no s_delay_alu after ds_load
# v_add writes v0, then ds_load clears all VALU state (waits for VA_VDST==0),
# so v_mul reading v0 should NOT get an s_delay_alu.
# CHECK-LABEL: @mem_clears_state
# CHECK: v_add_f32
# CHECK: ds_load_b128
# CHECK-NOT: s_delay_alu
# CHECK: v_mul_f32

st.func @mem_clears_state() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v[10:13] = "st.ds_load_b128"(v20, LDS0) { issueCycles = 1, latencyCycles = 56, mod.ds = { na = 1, offset = 0, gds = false }, mod.memtoken = { tokens = [0] } }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}

#--- XDL WMMA as TRANS: gfx1250-specific WMMA tracked in TRANS scoreboard
# CHECK-LABEL: @xdl_wmma_as_trans
# CHECK: v_wmma_f32_16x16x32_f16
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "TRANS"
# CHECK-SAME: instid0Distance = 1
# CHECK: v_add_f32

st.func @xdl_wmma_as_trans() {
^entry:
  a[0:7] = "st.v_wmma_f32_16x16x32_f16"(v[0:7], v[8:15], a[0:7]) { mod.mfma = { reuseA = false, reuseB = false } }
  v20 = "st.v_add_f32"(a0, v21) { issueCycles = 1, latencyCycles = 5 }
}

#--- Non-XDL WMMA as VALU: FP32-input WMMA tracked in VALU scoreboard
# CHECK-LABEL: @non_xdl_wmma_as_valu
# CHECK: v_wmma_f32_16x16x4_f32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "VALU"
# CHECK-SAME: instid0Distance = 1
# CHECK: v_add_f32

st.func @non_xdl_wmma_as_valu() {
^entry:
  a[0:7] = "st.v_wmma_f32_16x16x4_f32"(v[0:1], v[2:3], a[0:7]) { mod.mfma = { reuseA = false, reuseB = false } }
  v20 = "st.v_add_f32"(a0, v21) { issueCycles = 1, latencyCycles = 5 }
}

#--- XDL WMMA with intervening TRANS: both tracked in TRANS scoreboard
# CHECK-LABEL: @xdl_wmma_then_trans
# CHECK: v_wmma_f32_16x16x32_f16
# CHECK: v_exp_f32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "TRANS"
# CHECK-SAME: instid0Distance = 2
# CHECK: v_add_f32

st.func @xdl_wmma_then_trans() {
^entry:
  a[0:7] = "st.v_wmma_f32_16x16x32_f16"(v[0:7], v[8:15], a[0:7]) { mod.mfma = { reuseA = false, reuseB = false } }
  v16 = "st.v_exp_f32"(v17) { issueCycles = 1, latencyCycles = 8 }
  v18 = "st.v_add_f32"(a0, v19) { issueCycles = 1, latencyCycles = 5 }
}

#--- Dual dep on same inst: TRANS + VALU both needed
# CHECK-LABEL: @dual_dep_trans_valu_same
# CHECK: v_rcp_f32
# CHECK: v_add_f32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "TRANS"
# CHECK-SAME: instid0Distance = 1
# CHECK-SAME: instid1Type = "VALU"
# CHECK-SAME: instid1Distance = 1
# CHECK: v_mul_f32

st.func @dual_dep_trans_valu_same() {
^entry:
  v0 = "st.v_rcp_f32"(v1) { issueCycles = 1, latencyCycles = 8 }
  v2 = "st.v_add_f32"(v3, v4) { issueCycles = 1, latencyCycles = 5 }
  v5 = "st.v_mul_f32"(v0, v2) { issueCycles = 1, latencyCycles = 5 }
}

#--- TRANS dep only when VALU is older (VALU too far back)
# CHECK-LABEL: @trans_dep_only_valu_expired
# CHECK: v_add_f32
# CHECK: v_mov_b32
# CHECK: v_mov_b32
# CHECK: v_mov_b32
# CHECK: v_mov_b32
# CHECK: v_rcp_f32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "TRANS"
# CHECK-SAME: instid0Distance = 1
# CHECK-NOT: instid1
# CHECK: v_mul_f32

st.func @trans_dep_only_valu_expired() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v10 = "st.v_mov_b32"(v11) { issueCycles = 1, latencyCycles = 5 }
  v12 = "st.v_mov_b32"(v13) { issueCycles = 1, latencyCycles = 5 }
  v14 = "st.v_mov_b32"(v15) { issueCycles = 1, latencyCycles = 5 }
  v16 = "st.v_mov_b32"(v17) { issueCycles = 1, latencyCycles = 5 }
  v0 = "st.v_rcp_f32"(v0) { issueCycles = 1, latencyCycles = 8 }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}

#--- Dual dep: VALU + SALU on same instruction
# CHECK-LABEL: @dual_dep_valu_salu_same
# CHECK: v_add_f32
# CHECK: s_add_u32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Type = "VALU"
# CHECK-SAME: instid1Type = "SALU"
# CHECK: v_mul_f32

st.func @dual_dep_valu_salu_same() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  s0 = "st.s_add_u32"(s1, s2) { issueCycles = 1, latencyCycles = 2 }
  v3 = "st.v_mul_f32"(v0, s0) { issueCycles = 1, latencyCycles = 5 }
}

#--- Packed form: two deps close enough -> single s_delay_alu with instid0+instid1
# CHECK-LABEL: @packed_delay_alu
# CHECK: v_add_f32
# CHECK: v_mov_b32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Distance = 2
# CHECK-SAME: instid1Distance = 1
# CHECK: v_mul_f32
# CHECK: v_sub_f32

st.func @packed_delay_alu() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v5 = "st.v_mov_b32"(v6) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
  v7 = "st.v_sub_f32"(v3, v8) { issueCycles = 1, latencyCycles = 5 }
}

#--- Packed with skip=NEXT: two VALU deps packed into one s_delay_alu
#    v0 is 2 VALU back at v_mul, v7 is 2 VALU back at v_fma.
#    Skip between consumer1 (v_mul) and consumer2 (v_fma) = 1 -> NEXT.
# CHECK-LABEL: @packed_skip_next_dep2
# CHECK: v_add_f32
# CHECK: v_sub_f32
# CHECK-NEXT: s_delay_alu
# CHECK-SAME: instid0Distance = 2
# CHECK-SAME: instSkip
# CHECK-SAME: instid1Distance = 2
# CHECK: v_mul_f32
# CHECK: v_fma_f32

st.func @packed_skip_next_dep2() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v7 = "st.v_sub_f32"(v8, v9) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
  v12 = "st.v_fma_f32"(v7, v13, v14) { issueCycles = 1, latencyCycles = 5 }
}

#--- Can't pack: skip distance too far (>= 6 instructions between)
#    First dep: v0->v_mul = VALU_DEP_1. Second dep: TRANS v_rcp->v_sub.
#    TRANS latency=8 survives through 6 SALU fillers (SALUs don't increment
#    TRANSNum, and 8-1-6=1 > 0 cycles remain). But skip between
#    the first s_delay_alu and v_sub = 8 insts (>= 6), so they can't pack.
# CHECK-LABEL: @cant_pack_skip_too_far
# CHECK: v_add_f32
# CHECK: s_delay_alu
# CHECK-SAME: instid0Distance = 1
# CHECK-NOT: instid1
# CHECK: v_mul_f32
# CHECK: v_rcp_f32
# CHECK: s_add_u32
# CHECK: s_delay_alu
# CHECK-SAME: instid0Type = "TRANS"
# CHECK-SAME: instid0Distance = 1
# CHECK: v_sub_f32

st.func @cant_pack_skip_too_far() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
  v7 = "st.v_rcp_f32"(v8) { issueCycles = 1, latencyCycles = 8 }
  s10 = "st.s_add_u32"(s20, s21) { issueCycles = 1, latencyCycles = 2 }
  s11 = "st.s_add_u32"(s22, s23) { issueCycles = 1, latencyCycles = 2 }
  s12 = "st.s_add_u32"(s24, s25) { issueCycles = 1, latencyCycles = 2 }
  s13 = "st.s_add_u32"(s26, s27) { issueCycles = 1, latencyCycles = 2 }
  s14 = "st.s_add_u32"(s28, s29) { issueCycles = 1, latencyCycles = 2 }
  s15 = "st.s_add_u32"(s30, s31) { issueCycles = 1, latencyCycles = 2 }
  v5 = "st.v_sub_f32"(v7, v6) { issueCycles = 1, latencyCycles = 5 }
}

#--- Cross-BB: dependency spans two basic blocks
# CHECK-LABEL: @cross_bb_propagation
# CHECK: v_add_f32
# CHECK: ^bb1
# CHECK: s_delay_alu
# CHECK-SAME: instid0Type = "VALU"
# CHECK: v_mul_f32

st.func @cross_bb_propagation() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  "st.s_branch"("bb1") { issueCycles = 1, latencyCycles = 1 }
^bb1:
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}

#--- Back-edge loop: delay state propagates through loop back edge
# CHECK-LABEL: @back_edge_loop
# CHECK: ^loop
# CHECK: s_delay_alu
# CHECK: v_add_f32

st.func @back_edge_loop() {
^entry:
  "st.s_branch"("loop") { issueCycles = 1, latencyCycles = 1 }
^loop:
  v0 = "st.v_add_f32"(v0, v1) { issueCycles = 1, latencyCycles = 5 }
  "st.s_cbranch_scc1"("loop") { issueCycles = 1, latencyCycles = 1 }
}

#--- Diamond CFG: merge takes worst-case (smallest distance) from predecessors
#        entry
#       /     \
#     bb1     bb2
#       \     /
#        merge
# bb1: v0 written, 1 VALU back at merge -> VALU_DEP_1
# bb2: v0 written, 3 VALU back at merge -> VALU_DEP_3
# merge should use VALU_DEP_1 (worst case = closest producer)
# CHECK-LABEL: @diamond_merge
# CHECK: ^merge
# CHECK: s_delay_alu
# CHECK-SAME: instid0Type = "VALU"
# CHECK-SAME: instid0Distance = 1
# CHECK: v_mul_f32

st.func @diamond_merge() {
^entry:
  "st.s_cbranch_scc1"("bb2", SCC0) { issueCycles = 1, latencyCycles = 1 }
  Successors: ^bb1, ^bb2
^bb1:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  "st.s_branch"("merge") { issueCycles = 1, latencyCycles = 1 }
  Successors: ^merge
^bb2:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  v5 = "st.v_mov_b32"(v6) { issueCycles = 1, latencyCycles = 5 }
  v7 = "st.v_mov_b32"(v8) { issueCycles = 1, latencyCycles = 5 }
  Successors: ^merge
^merge:
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}

#--- Existing s_delay_alu treated as OTHER: doesn't affect delay state
# CHECK-LABEL: @existing_delay_alu_is_other
# CHECK: v_add_f32
# CHECK: s_delay_alu
# CHECK: v_mul_f32

st.func @existing_delay_alu_is_other() {
^entry:
  v0 = "st.v_add_f32"(v1, v2) { issueCycles = 1, latencyCycles = 5 }
  "st.s_delay_alu"() { issueCycles = 0, latencyCycles = 0, mod.delayalu = { instid0Type = "NO_DEP", instid0Distance = 0 } }
  v3 = "st.v_mul_f32"(v0, v4) { issueCycles = 1, latencyCycles = 5 }
}