# RUN: %stinkytofu-opt --arch gfx1250 %s --RedundantMovEliminationPass --print-output
#
# Redundant MOV Elimination: remove duplicate v_mov_b32 instructions
# that write the same value to the same destination.
# Converted from RedundantMovEliminationPassTest.

#--- Simple duplicate: two identical movs, second is eliminated
# CHECK-LABEL: @eliminate_simple_duplicate
# CHECK: v_mov_b32
# CHECK-SAME: v0
# CHECK-SAME: v1
# CHECK: v_add_f32
# CHECK: v_sub_f32
# CHECK-NOT: v_mov_b32

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

#--- Multiple duplicates: three identical movs, only first kept
# CHECK-LABEL: @multiple_duplicates
# CHECK: v_mov_b32
# CHECK-SAME: v0
# CHECK-SAME: v1
# CHECK: v_add_f32
# CHECK: v_sub_f32
# CHECK: v_fma_f32
# CHECK-NOT: v_mov_b32

st.func @multiple_duplicates() {
^entry:
  v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
  v3 = "st.v_add_f32"(v4, v5) { issueCycles = 1, latencyCycles = 5 }
  v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
  v6 = "st.v_sub_f32"(v7, v8) { issueCycles = 1, latencyCycles = 5 }
  v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
  v9 = "st.v_fma_f32"(v0, v3, v6) { issueCycles = 1, latencyCycles = 5 }
}

#--- Don't eliminate when source is modified between movs
# CHECK-LABEL: @dont_eliminate_modified_operand
# CHECK: v_mov_b32
# CHECK-SAME: v0
# CHECK-SAME: v1
# CHECK: v_add_f32
# CHECK: v_sub_f32
# CHECK-SAME: v1
# CHECK: v_mov_b32
# CHECK-SAME: v8
# CHECK-SAME: v1

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

#--- Different operands: all movs have different src/dst, none eliminated
# CHECK-LABEL: @different_operands
# CHECK: v_mov_b32
# CHECK-SAME: v0
# CHECK-SAME: v1
# CHECK: v_mov_b32
# CHECK-SAME: v3
# CHECK-SAME: v4
# CHECK: v_mov_b32
# CHECK-SAME: v6
# CHECK-SAME: v5

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

#--- No duplicates: all movs to different destinations with different sources
# CHECK-LABEL: @no_duplicates
# CHECK: v_mov_b32
# CHECK: v_mov_b32
# CHECK: v_mov_b32
# CHECK: v_mov_b32

st.func @no_duplicates() {
^entry:
  v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
  v3 = "st.v_mov_b32"(v4) { issueCycles = 1, latencyCycles = 1 }
  v6 = "st.v_mov_b32"(v7) { issueCycles = 1, latencyCycles = 1 }
  v9 = "st.v_mov_b32"(v10) { issueCycles = 1, latencyCycles = 1 }
}