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|
# 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 "frame-pointer"="all" }
...
---
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
|
