# RUN: llc -o /dev/null 2>&1 %s -mtriple aarch64-unknown -mattr=fuse-arith-logic -run-pass=machine-scheduler -misched-print-dags | FileCheck %s
# RUN: llc -o /dev/null 2>&1 %s -mtriple aarch64-unknown -mcpu=exynos-m4         -run-pass=machine-scheduler -misched-print-dags | FileCheck %s
# REQUIRES: asserts

---
name: arith
body: |
  bb.0.entry:
    %0:gpr32 = SUBWrr undef $w0, undef $w1
    %1:gpr32 = ADDWrr undef $w1, undef $w2
    %2:gpr32 = SUBWrs %0, undef $w2, 0
    %3:gpr32 = ADDWrs %1, undef $w3, 0

    ; CHECK: SU(0): %0:gpr32 = SUBWrr undef $w0, undef $w1
    ; CHECK: Successors:
    ; CHECK: SU(2): Ord  Latency=0 Cluster
    ; CHECK: SU(1): %1:gpr32 = ADDWrr undef $w1, undef $w2
    ; CHECK: Successors:
    ; CHECK: SU(3): Ord  Latency=0 Cluster
    ; CHECK: SU(2): dead %2:gpr32 = SUBWrs %0:gpr32, undef $w2, 0
    ; CHECK: Predecessors:
    ; CHECK: SU(0): Ord  Latency=0 Cluster
    ; CHECK: SU(3): dead %3:gpr32 = ADDWrs %1:gpr32, undef $w3, 0
    ; CHECK: Predecessors:
    ; CHECK: SU(1): Ord  Latency=0 Cluster
...
---
name: compare
body: |
  bb.0.entry:
    %0:gpr64 = ADDXrr undef $x0, undef $x1
    %1:gpr64 = SUBXrs undef $x1, undef $x2, 0
    %2:gpr64 = ADDSXrr %0, undef $x3, implicit-def $nzcv
    %3:gpr64 = SUBSXrs %1, undef $x4, 0, implicit-def $nzcv

    ; CHECK: SU(0): %0:gpr64 = ADDXrr undef $x0, undef $x1
    ; CHECK: Successors:
    ; CHECK: SU(2): Ord  Latency=0 Cluster
    ; CHECK: SU(1): %1:gpr64 = SUBXrs undef $x1, undef $x2, 0
    ; CHECK: Successors:
    ; CHECK: SU(3): Ord  Latency=0 Cluster
    ; CHECK: SU(2): dead %2:gpr64 = ADDSXrr %0:gpr64, undef $x3, implicit-def $nzcv
    ; CHECK: Predecessors:
    ; CHECK: SU(0): Ord  Latency=0 Cluster
    ; CHECK: SU(3): dead %3:gpr64 = SUBSXrs %1:gpr64, undef $x4, 0, implicit-def $nzcv
    ; CHECK: Predecessors:
    ; CHECK: SU(1): Ord  Latency=0 Cluster
...
---
name: logic
body: |
  bb.0.entry:
    %0:gpr32 = ADDWrr undef $w0, undef $w1
    %1:gpr64 = SUBXrs undef $x1, undef $x2, 0
    %3:gpr32 = ANDWrs %0, undef $w3, 0
    %4:gpr64 = ORRXrr %1, undef $x4

    ; CHECK: SU(0): %0:gpr32 = ADDWrr undef $w0, undef $w1
    ; CHECK: Successors:
    ; CHECK: SU(2): Ord  Latency=0 Cluster
    ; CHECK: SU(1): %1:gpr64 = SUBXrs undef $x1, undef $x2, 0
    ; CHECK: Successors:
    ; CHECK: SU(3): Ord  Latency=0 Cluster
    ; CHECK: SU(2): dead %2:gpr32 = ANDWrs %0:gpr32, undef $w3, 0
    ; CHECK: Predecessors:
    ; CHECK: SU(0): Ord  Latency=0 Cluster
    ; CHECK: SU(3): dead %3:gpr64 = ORRXrr %1:gpr64, undef $x4
    ; CHECK: Predecessors:
    ; CHECK: SU(1): Ord  Latency=0 Cluster
...
---
name: nope
body: |
  bb.0.entry:
    ; Shifted register.
    %0:gpr32 = SUBWrr undef $w0, undef $w1
    %1:gpr32 = SUBWrs %0, undef $w2, 1
    ; CHECK: SU(0): %0:gpr32 = SUBWrr undef $w0, undef $w1
    ; CHECK: Successors:
    ; CHECK-NOT: SU(1): Ord  Latency=0 Cluster
    ; CHECK: SU(1): dead %1:gpr32 = SUBWrs %0:gpr32, undef $w2, 1

    ; Multiple successors.
    %2:gpr64 = ADDXrr undef $x0, undef $x1
    %3:gpr32 = EXTRACT_SUBREG %2, %subreg.sub_32
    %4:gpr32 = ANDWrs %3, undef $w2, 0
    %5:gpr64 = ADDSXrr %2, undef $x3, implicit-def $nzcv
    ; CHECK: SU(2): %2:gpr64 = ADDXrr undef $x0, undef $x1
    ; CHECK: Successors:
    ; CHECK-NOT: SU(3): Ord  Latency=0 Cluster
    ; CHECK: SU(5): Ord  Latency=0 Cluster
    ; CHECK: SU(3): %3:gpr32 = EXTRACT_SUBREG %2:gpr64, %subreg.sub_32
    ; CHECK: SU(5): dead %5:gpr64 = ADDSXrr %2:gpr64, undef $x3, implicit-def $nzcv

    ; Different register sizes.
    %6:gpr32 = SUBWrr undef $w0, undef $w1
    %7:gpr64 = ADDXrr undef $x1, undef $x2
    %8:gpr64 = SUBXrr %7, undef $x3
    %9:gpr32 = ADDWrr %6, undef $w4
    ; CHECK: SU(6): %6:gpr32 = SUBWrr undef $w0, undef $w1
    ; CHECK: Successors:
    ; CHECK-NOT: SU(8): Ord  Latency=0 Cluster
    ; CHECK: SU(7): %7:gpr64 = ADDXrr undef $x1, undef $x2
    ; CHECK: Successors:
    ; CHECK-NOT: SU(9): Ord  Latency=0 Cluster
    ; CHECK: SU(8): dead %8:gpr64 = SUBXrr %7:gpr64, undef $x3
    ; CHECK: Predecessors:
    ; CHECK: SU(7): Ord  Latency=0 Cluster
    ; CHECK: SU(9): dead %9:gpr32 = ADDWrr %6:gpr32, undef $w4
    ; CHECK: Predecessors:
    ; CHECK: SU(6): Ord  Latency=0 Cluster
...