llvm/test/CodeGen/AArch64/init-undef.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
# RUN: llc -mtriple=aarch64-- -aarch64-enable-subreg-liveness-tracking=false -run-pass=init-undef -o - %s | FileCheck %s
# RUN: llc -mtriple=aarch64-- -aarch64-enable-subreg-liveness-tracking=true -run-pass=init-undef -o - %s | FileCheck %s

# RUN: llc -mtriple=aarch64-- -aarch64-enable-subreg-liveness-tracking=false -passes=init-undef -o - %s | FileCheck %s
# RUN: llc -mtriple=aarch64-- -aarch64-enable-subreg-liveness-tracking=true -passes=init-undef -o - %s | FileCheck %s

---
name:            test_stxp_undef
body:             |
  bb.0:
    liveins: $x0, $x1

    ; CHECK-LABEL: name: test_stxp_undef
    ; CHECK: liveins: $x0, $x1
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: [[COPY:%[0-9]+]]:gpr64 = COPY $x1
    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:gpr64common = COPY $x0
    ; CHECK-NEXT: [[DEF:%[0-9]+]]:gpr64 = IMPLICIT_DEF
    ; CHECK-NEXT: [[INIT_UNDEF:%[0-9]+]]:gpr64 = INIT_UNDEF
    ; CHECK-NEXT: early-clobber %3:gpr32 = STXPX killed [[INIT_UNDEF]], [[COPY]], [[COPY1]] :: (volatile store (s128))
    ; CHECK-NEXT: $w0 = COPY %3
    ; CHECK-NEXT: RET_ReallyLR implicit $w0
    %1:gpr64 = COPY $x1
    %0:gpr64common = COPY $x0
    %3:gpr64 = IMPLICIT_DEF
    early-clobber %2:gpr32 = STXPX killed %3, %1, %0 :: (volatile store (s128))
    $w0 = COPY %2
    RET_ReallyLR implicit $w0

...