test/CodeGen/AArch64/machine-outliner-all-stack.mir

# RUN: llc -mtriple=aarch64--- -run-pass=machine-outliner \
# RUN: -verify-machineinstrs %s -o - | FileCheck %s

# Show that, when instructions that use the stack are present, it's possible
# for us to outline everything as the default outlining type.
# It's possible for reg-save-possible to outline by storing LR to a register,
# but most candidates in this case require us to modify the stack. The outliner
# should see that it's more beneficial to fix up instructions and save LR to
# the stack in this case.

--- |
  define void @reg-save-possible() #0 { ret void }
  define void @stack-save1() #0 { ret void }
  define void @stack-save2() #0 { ret void }
  define void @stack-save3() #0 { ret void }
  attributes #0 = { minsize noinline noredzone "no-frame-pointer-elim"="true" }
...
---

name:            reg-save-possible
tracksRegLiveness: true
body:             |
  bb.0:
  liveins: $lr
  $lr = ORRXri $xzr, 1
  $x19 = ORRXri $xzr, 1
  $x20 = ORRXri $xzr, 1
  bb.1:
    liveins: $lr
    ; CHECK-LABEL: name:            reg-save-possible
    ; CHECK: $sp = STRXpre $lr, $sp, -16
    ; CHECK-NEXT: BL [[FN:@OUTLINED_FUNCTION_[0-9]+]]
    ; CHECK-NEXT: $sp, $lr = LDRXpost $sp, 16
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
  bb.2:
    RET undef $lr

...
---

name:            stack-save1
tracksRegLiveness: true
body:             |
  bb.0:
  liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x18, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $fp
  $lr = ORRXri $xzr, 1
  bb.1:
  liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x18, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $fp
    ; CHECK-LABEL: name:            stack-save1
    ; CHECK: $sp = STRXpre $lr, $sp, -16
    ; CHECK-NEXT: BL [[FN]]
    ; CHECK-NEXT: $sp, $lr = LDRXpost $sp, 16
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
  bb.2:
  liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x18, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $fp
    RET undef $lr

...
---

name:            stack-save2
tracksRegLiveness: true
body:             |
  bb.0:
  liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x18, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $fp
  $lr = ORRXri $xzr, 1
  bb.1:
  liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x18, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $fp
    ; CHECK-LABEL: name:            stack-save2
    ; CHECK: $sp = STRXpre $lr, $sp, -16
    ; CHECK-NEXT: BL [[FN]]
    ; CHECK-NEXT: $sp, $lr = LDRXpost $sp, 16
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
  bb.2:
  liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x18, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $fp
    RET undef $lr

...
---

name:            stack-save3
tracksRegLiveness: true
body:             |
  bb.0:
  liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x18, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $fp
  $lr = ORRXri $xzr, 1
  bb.1:
  liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x18, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $fp
    ; CHECK-LABEL: name:            stack-save3
    ; CHECK: $sp = STRXpre $lr, $sp, -16
    ; CHECK-NEXT: BL [[FN]]
    ; CHECK-NEXT: $sp, $lr = LDRXpost $sp, 16
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
    $x20, $x19 = LDPXi $sp, 10
  bb.2:
  liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x18, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $fp
    RET undef $lr