llvm/test/CodeGen/AArch64/fuse-addr-mode.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
# RUN: llc -mtriple=aarch64 -o - %s -run-pass machine-sink | FileCheck %s

# we want to fuse an addition with lsl into an ldr but we have to be careful with
# the shift distance: we can only represent specific shift distances: e.g: 3
# but nothing large like 32

--- |
  define dso_local i64 @fuse_shift_add_into_addr_mode()  {
  entry:
    ret i64 0
  }

---
name:            fuse_shift_add_into_addr_mode
body:             |
  bb.1.entry:
    liveins: $x0, $x1

    ; CHECK-LABEL: name: fuse_shift_add_into_addr_mode
    ; CHECK: liveins: $x0, $x1
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: [[COPY:%[0-9]+]]:gpr64common = COPY $x0
    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:gpr64 = COPY $x1
    ; CHECK-NEXT: [[LDRXroX:%[0-9]+]]:gpr64 = LDRXroX [[COPY]], [[COPY1]], 0, 1 :: (load (s64))
    ; CHECK-NEXT: [[ADDXrs:%[0-9]+]]:gpr64common = ADDXrs [[COPY]], [[COPY1]], 5
    ; CHECK-NEXT: [[LDRXui:%[0-9]+]]:gpr64 = LDRXui [[ADDXrs]], 0 :: (load (s64))
    ; CHECK-NEXT: [[ADDXrs1:%[0-9]+]]:gpr64common = ADDXrs [[COPY]], [[COPY1]], 32
    ; CHECK-NEXT: [[LDRXui1:%[0-9]+]]:gpr64 = LDRXui [[ADDXrs1]], 0 :: (load (s64))
    ; CHECK-NEXT: [[ADDXrs2:%[0-9]+]]:gpr64common = ADDXrs [[COPY]], [[COPY1]], 35
    ; CHECK-NEXT: [[LDRXui2:%[0-9]+]]:gpr64 = LDRXui [[ADDXrs1]], 0 :: (load (s64))
    ; CHECK-NEXT: [[ADDXrs3:%[0-9]+]]:gpr64common = ADDXrs [[COPY]], [[COPY1]], 63
    ; CHECK-NEXT: [[LDRXui3:%[0-9]+]]:gpr64 = LDRXui [[ADDXrs1]], 0 :: (load (s64))
    ; CHECK-NEXT: RET_ReallyLR implicit $x0
    %0:gpr64 = COPY $x0
    %1:gpr64 = COPY $x1
    %2:gpr64common = ADDXrs %0, %1, 3
    %3:gpr64 = LDRXui %2, 0 :: (load (s64))
    %4:gpr64common = ADDXrs %0, %1, 5
    %5:gpr64 = LDRXui %4, 0 :: (load (s64))
    %6:gpr64common = ADDXrs %0, %1, 32
    %7:gpr64 = LDRXui %6, 0 :: (load (s64))
    %8:gpr64common = ADDXrs %0, %1, 35
    %9:gpr64 = LDRXui %6, 0 :: (load (s64))
    %10:gpr64common = ADDXrs %0, %1, 63
    %11:gpr64 = LDRXui %6, 0 :: (load (s64))
    RET_ReallyLR implicit $x0