# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
# RUN: llc --run-pass=aarch64-ldst-opt %s -o - | FileCheck %s
--- |
target triple = "aarch64-unknown-linux"
define i32 @f(i32 %x) {
entry:
ret i32 0
}
declare i32 @g(i32)
...
---
name: f
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$w0', virtual-reg: '' }
frameInfo:
stackSize: 32
maxAlignment: 8
adjustsStack: true
hasCalls: true
isCalleeSavedInfoValid: true
fixedStack: []
stack:
- { id: 0, name: '', type: spill-slot, offset: -24, size: 8, alignment: 8,
stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 1, name: '', type: spill-slot, offset: -32, size: 8, alignment: 8,
stack-id: default, callee-saved-register: '$fp', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
entry_values: []
callSites: []
debugValueSubstitutions: []
constants: []
machineFunctionInfo:
hasRedZone: false
body: |
bb.0.entry:
liveins: $w0, $lr, $x0
;
; Test an SP update is merged forwards into a load instruction,
; because an access to the load destination reg prevents merging backwards.
;
; CHECK-LABEL: name: f
; CHECK: liveins: $w0, $lr, $x0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: $x1 = ADDXri $x0, 1, 0
; CHECK-NEXT: early-clobber $sp, $x0 = frame-setup LDRXpre $sp, -32
; CHECK-NEXT: frame-setup CFI_INSTRUCTION def_cfa_offset 32
; CHECK-NEXT: frame-setup STRXui killed $fp, $sp, 0 :: (store (s64) into %stack.1)
; CHECK-NEXT: frame-setup STRXui killed $x1, $sp, 1
; CHECK-NEXT: frame-setup STRXui killed $lr, $sp, 2 :: (store (s64) into %stack.0)
; CHECK-NEXT: $fp = frame-setup ADDXri $sp, 0, 0
; CHECK-NEXT: frame-setup CFI_INSTRUCTION def_cfa $w29, 32
; CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $w30, -8
; CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $w29, -16
; CHECK-NEXT: renamable $w0 = nsw SUBWri killed renamable $w0, 1, 0
; CHECK-NEXT: BL @g, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $w0, implicit-def $sp, implicit-def $w0
; CHECK-NEXT: $w0 = nsw ADDWri killed renamable $w0, 1, 0
; CHECK-NEXT: $fp = frame-destroy LDRXui $sp, 0 :: (load (s64) from %stack.1)
; CHECK-NEXT: $lr = frame-destroy LDRXui $sp, 2 :: (load (s64) from %stack.0)
; CHECK-NEXT: $sp = frame-destroy ADDXri $sp, 32, 0
; CHECK-NEXT: RET undef $lr, implicit $w0
$sp = frame-setup SUBXri $sp, 32, 0
frame-setup CFI_INSTRUCTION def_cfa_offset 32
$x1 = ADDXri $x0, 1, 0
$x0 = frame-setup LDRXui $sp, 0
frame-setup STRXui killed $fp, $sp, 0 :: (store (s64) into %stack.1)
frame-setup STRXui killed $x1, $sp, 1
frame-setup STRXui killed $lr, $sp, 2 :: (store (s64) into %stack.0)
$fp = frame-setup ADDXri $sp, 0, 0
frame-setup CFI_INSTRUCTION def_cfa $w29, 32
frame-setup CFI_INSTRUCTION offset $w30, -8
frame-setup CFI_INSTRUCTION offset $w29, -16
renamable $w0 = nsw SUBWri killed renamable $w0, 1, 0
BL @g, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $w0, implicit-def $sp, implicit-def $w0
$w0 = nsw ADDWri killed renamable $w0, 1, 0
$fp = frame-destroy LDRXui $sp, 0 :: (load (s64) from %stack.1)
$lr = frame-destroy LDRXui $sp, 2 :: (load (s64) from %stack.0)
$sp = frame-destroy ADDXri $sp, 32, 0
RET undef $lr, implicit $w0
...
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