src/third_party/llvm-project/llvm/test/CodeGen/PowerPC/scavenging.mir

# RUN: llc -mtriple=ppc64-- -run-pass scavenger-test -verify-machineinstrs -o - %s | FileCheck %s
---
# CHECK-LABEL: name: noscav0
name: noscav0
tracksRegLiveness: true
body: |
  bb.0:
    ; CHECK: [[REG0:\$r[0-9]+]] = LI 42
    ; CHECK-NEXT: NOP implicit killed [[REG0]]
    %0 : gprc = LI 42
    NOP implicit %0

    ; CHECK: [[REG1:\$r[0-9]+]] = LI 42
    ; CHECK-NEXT: NOP
    ; CHECK-NEXT: NOP implicit [[REG1]]
    ; CHECK-NEXT: NOP
    ; CHECK-NEXT: NOP implicit killed [[REG1]]
    %1 : gprc = LI 42
    NOP
    NOP implicit %1
    NOP
    NOP implicit %1

    ; CHECK: [[REG2:\$r[0-9]+]] = LI 42
    ; CHECK-NEXT: NOP implicit [[REG2]]
    %2 : gprc = LI 42
    NOP implicit %2

    $x0 = IMPLICIT_DEF
    $x1 = IMPLICIT_DEF
    $x2 = IMPLICIT_DEF
    $x3 = IMPLICIT_DEF
    $x4 = IMPLICIT_DEF
    $x27 = IMPLICIT_DEF
    $x28 = IMPLICIT_DEF
    $x29 = IMPLICIT_DEF
    $x30 = IMPLICIT_DEF

    ; CHECK-NOT: $x0 = LI 42
    ; CHECK-NOT: $x1 = LI 42
    ; CHECK-NOT: $x2 = LI 42
    ; CHECK-NOT: $x3 = LI 42
    ; CHECK-NOT: $x4 = LI 42
    ; CHECK-NOT: $x5 = LI 42
    ; CHECK-NOT: $x27 = LI 42
    ; CHECK-NOT: $x28 = LI 42
    ; CHECK-NOT: $x29 = LI 42
    ; CHECK-NOT: $x30 = LI 42
    ; CHECK: [[REG3:\$r[0-9]+]] = LI 42
    ; CHECK-NEXT: $x5 = IMPLICIT_DEF
    ; CHECK-NEXT: NOP implicit killed [[REG2]]
    ; CHECK-NEXT: NOP implicit killed [[REG3]]
    %3 : gprc = LI 42
    $x5 = IMPLICIT_DEF
    NOP implicit %2
    NOP implicit %3

    NOP implicit $x0
    NOP implicit $x1
    NOP implicit $x2
    NOP implicit $x3
    NOP implicit $x4
    NOP implicit $x5
    NOP implicit $x27
    NOP implicit $x28
    NOP implicit $x29
    NOP implicit $x30
...
---
# CHECK-LABEL: name: scav0
name: scav0
tracksRegLiveness: true
stack:
  # variable-sized object should be a reason to reserve an emergency spillslot
  # in the RegScavenger
  - { id: 0, type: variable-sized, offset: -32, alignment: 1 }
body: |
  bb.0:
    $x0 = IMPLICIT_DEF
    $x1 = IMPLICIT_DEF
    $x2 = IMPLICIT_DEF
    $x3 = IMPLICIT_DEF
    $x4 = IMPLICIT_DEF
    $x5 = IMPLICIT_DEF
    $x6 = IMPLICIT_DEF
    $x7 = IMPLICIT_DEF
    $x8 = IMPLICIT_DEF
    $x9 = IMPLICIT_DEF
    $x10 = IMPLICIT_DEF
    $x11 = IMPLICIT_DEF
    $x12 = IMPLICIT_DEF
    $x13 = IMPLICIT_DEF
    $x14 = IMPLICIT_DEF
    $x15 = IMPLICIT_DEF
    $x16 = IMPLICIT_DEF
    $x17 = IMPLICIT_DEF
    $x18 = IMPLICIT_DEF
    $x19 = IMPLICIT_DEF
    $x20 = IMPLICIT_DEF
    $x21 = IMPLICIT_DEF
    $x22 = IMPLICIT_DEF
    $x23 = IMPLICIT_DEF
    $x24 = IMPLICIT_DEF
    $x25 = IMPLICIT_DEF
    $x26 = IMPLICIT_DEF
    $x27 = IMPLICIT_DEF
    $x28 = IMPLICIT_DEF
    $x29 = IMPLICIT_DEF
    $x30 = IMPLICIT_DEF

    ; CHECK: STD killed [[SPILLEDREG:\$x[0-9]+]]
    ; CHECK: [[SPILLEDREG]] = LI8 42
    ; CHECK: NOP implicit killed [[SPILLEDREG]]
    ; CHECK: [[SPILLEDREG]] = LD
    %0 : g8rc = LI8 42
    NOP implicit %0

    NOP implicit $x0
    NOP implicit $x1
    NOP implicit $x2
    NOP implicit $x3
    NOP implicit $x4
    NOP implicit $x5
    NOP implicit $x6
    NOP implicit $x7
    NOP implicit $x8
    NOP implicit $x9
    NOP implicit $x10
    NOP implicit $x11
    NOP implicit $x12
    NOP implicit $x13
    NOP implicit $x14
    NOP implicit $x15
    NOP implicit $x16
    NOP implicit $x17
    NOP implicit $x18
    NOP implicit $x19
    NOP implicit $x20
    NOP implicit $x21
    NOP implicit $x22
    NOP implicit $x23
    NOP implicit $x24
    NOP implicit $x25
    NOP implicit $x26
    NOP implicit $x27
    NOP implicit $x28
    NOP implicit $x29
    NOP implicit $x30
...
---
# Check for bug where we would refuse to spill before the first instruction in a
# block.
# CHECK-LABEL: name: spill_at_begin
# CHECK: bb.0:
# CHECK: liveins:
# CHECK: STD killed [[REG:\$x[0-9]+]]{{.*}}(store 8 into %stack.{{[0-9]+}})
# CHECK: [[REG]] = LIS8 0
# CHECK: [[REG]] = ORI8 killed [[REG]], 48
# CHECK: NOP implicit killed [[REG]]
# CHEKC: [[REG]] = LD{{.*}}(load 8 from %stack.{{[0-9]+}})
name: spill_at_begin
tracksRegLiveness: true
stack:
  # variable-sized object should be a reason to reserve an emergency spillslot
  # in the RegScavenger
  - { id: 0, type: variable-sized, offset: -32, alignment: 1 }
body: |
  bb.0:
    liveins: $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x16, $x17, $x18, $x19, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $x29, $x30, $x31
    %0 : g8rc = LIS8 0
    %1 : g8rc = ORI8 %0, 48
    NOP implicit %1

    NOP implicit $x0
    NOP implicit $x1
    NOP implicit $x2
    NOP implicit $x3
    NOP implicit $x4
    NOP implicit $x5
    NOP implicit $x6
    NOP implicit $x7
    NOP implicit $x8
    NOP implicit $x9
    NOP implicit $x10
    NOP implicit $x11
    NOP implicit $x12
    NOP implicit $x13
    NOP implicit $x14
    NOP implicit $x15
    NOP implicit $x16
    NOP implicit $x17
    NOP implicit $x18
    NOP implicit $x19
    NOP implicit $x20
    NOP implicit $x21
    NOP implicit $x22
    NOP implicit $x23
    NOP implicit $x24
    NOP implicit $x25
    NOP implicit $x26
    NOP implicit $x27
    NOP implicit $x28
    NOP implicit $x29
    NOP implicit $x30
    NOP implicit $x31
...