llvm/test/CodeGen/AArch64/sme-streaming-mode-landingpads.ll

; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
; RUN: llc -mtriple=aarch64 -aarch64-streaming-hazard-size=0 -mattr=+sme,+sve -stop-before=finalize-isel -verify-machineinstrs < %s | FileCheck %s

target triple = "aarch64-unknown-linux-gnu"

declare void @"StreamingCleanup::~StreamingCleanup"(ptr %this) nounwind "aarch64_pstate_sm_enabled"
declare void @"StreamingCompatCleanup::~StreamingCompatCleanup"(ptr %this) nounwind "aarch64_pstate_sm_compatible"

declare void @may_throw() "aarch64_pstate_sm_compatible"

; This test models the kind of IR clang would emit for the following C++:
;
; struct StreamingCleanup {
;     ~StreamingCleanup() __arm_streaming
; };
;
; void may_throw() __arm_streaming_compatible;
;
; void streaming_with_cleanup() __arm_streaming {
;     StreamingCleanup cleanup;
;     may_throw();
; }
;
; This is a streaming function and all callees of this function are streaming[-compatible]
; functions (including the StreamingCleanup destructor). This means call lowering will not
; insert any streaming mode switches. However, if "may_throw" throws an exception, the
; unwinder can re-enter this function (in %unwind_cleanup) to run the "StreamingCleanup"
; destructor. The unwinder will always re-enter functions with streaming-mode disabled, so
; we must ensure streaming-mode is enabled on entry to exception handlers.
define void @streaming_with_cleanup() "aarch64_pstate_sm_enabled" personality ptr @__gxx_personality_v0 {
  ; CHECK-LABEL: name: streaming_with_cleanup
  ; CHECK: bb.0 (%ir-block.0):
  ; CHECK-NEXT:   successors: %bb.1(0x7ffff800), %bb.2(0x00000800)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   EH_LABEL <mcsymbol >
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   BL @may_throw, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   EH_LABEL <mcsymbol >
  ; CHECK-NEXT:   B %bb.1
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.1.normal_return:
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   [[ADDXri:%[0-9]+]]:gpr64sp = ADDXri %stack.0.cleanup, 0, 0
  ; CHECK-NEXT:   $x0 = COPY [[ADDXri]]
  ; CHECK-NEXT:   BL @"StreamingCleanup::~StreamingCleanup", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   RET_ReallyLR
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.2.unwind_cleanup (landing-pad):
  ; CHECK-NEXT:   liveins: $x0, $x1
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   EH_LABEL <mcsymbol >
  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:gpr64all = COPY killed $x1
  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:gpr64all = COPY killed $x0
  ; CHECK-NEXT:   MSRpstatesvcrImm1 1, 1, csr_aarch64_smstartstop, implicit-def dead $nzcv, implicit $vg, implicit-def $vg, implicit-def $fpmr
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   [[ADDXri1:%[0-9]+]]:gpr64sp = ADDXri %stack.0.cleanup, 0, 0
  ; CHECK-NEXT:   $x0 = COPY [[ADDXri1]]
  ; CHECK-NEXT:   BL @"StreamingCleanup::~StreamingCleanup", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   MSRpstatesvcrImm1 1, 0, csr_aarch64_smstartstop, implicit-def dead $nzcv, implicit-def $sp, implicit $vg, implicit-def $vg, implicit-def $fpmr
  ; CHECK-NEXT:   $x0 = COPY [[COPY1]]
  ; CHECK-NEXT:   BL @_Unwind_Resume, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   MSRpstatesvcrImm1 1, 1, csr_aarch64_smstartstop, implicit-def dead $nzcv, implicit $vg, implicit-def $vg, implicit-def $fpmr
  %cleanup = alloca i8, align 1
  invoke void @may_throw()
          to label %normal_return unwind label %unwind_cleanup

normal_return:
  call void @"StreamingCleanup::~StreamingCleanup"(ptr %cleanup)
  ret void

unwind_cleanup:
  %eh_info = landingpad { ptr, i32 }
          cleanup
  call void @"StreamingCleanup::~StreamingCleanup"(ptr %cleanup)
  resume { ptr, i32 } %eh_info
}

; This test is the same as "streaming_with_cleanup", but now the function and destructor
; are streaming-compatible functions. In this case, when we enter the exception handler,
; we must switch to streaming-mode "streaming_compatible_with_cleanup" was entered with
; during normal execution (i.e., EntryPStateSM).
define void @streaming_compatible_with_cleanup() "aarch64_pstate_sm_compatible" personality ptr @__gxx_personality_v0 {
  ; CHECK-LABEL: name: streaming_compatible_with_cleanup
  ; CHECK: bb.0 (%ir-block.0):
  ; CHECK-NEXT:   successors: %bb.1(0x7ffff800), %bb.2(0x00000800)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[EntryPStateSM:%[0-9]+]]:gpr64 = EntryPStateSM
  ; CHECK-NEXT:   EH_LABEL <mcsymbol >
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   BL @may_throw, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   EH_LABEL <mcsymbol >
  ; CHECK-NEXT:   B %bb.1
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.1.normal_return:
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   [[ADDXri:%[0-9]+]]:gpr64sp = ADDXri %stack.0.cleanup, 0, 0
  ; CHECK-NEXT:   $x0 = COPY [[ADDXri]]
  ; CHECK-NEXT:   BL @"StreamingCompatCleanup::~StreamingCompatCleanup", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   RET_ReallyLR
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.2.unwind_cleanup (landing-pad):
  ; CHECK-NEXT:   liveins: $x0, $x1
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   EH_LABEL <mcsymbol >
  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:gpr64all = COPY killed $x1
  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:gpr64all = COPY killed $x0
  ; CHECK-NEXT:   MSRpstatePseudo 1, 1, 1, [[EntryPStateSM]], csr_aarch64_smstartstop, implicit-def dead $vg, implicit $vg, implicit $vg, implicit-def $vg, implicit-def $fpmr
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   [[ADDXri1:%[0-9]+]]:gpr64sp = ADDXri %stack.0.cleanup, 0, 0
  ; CHECK-NEXT:   $x0 = COPY [[ADDXri1]]
  ; CHECK-NEXT:   BL @"StreamingCompatCleanup::~StreamingCompatCleanup", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   MSRpstatePseudo 1, 0, 1, [[EntryPStateSM]], csr_aarch64_smstartstop, implicit-def $vg, implicit $vg, implicit-def $sp, implicit $vg, implicit-def $vg, implicit-def $fpmr
  ; CHECK-NEXT:   $x0 = COPY [[COPY1]]
  ; CHECK-NEXT:   BL @_Unwind_Resume, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp, implicit-def $vg
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   MSRpstatePseudo 1, 1, 1, [[EntryPStateSM]], csr_aarch64_smstartstop, implicit-def dead $vg, implicit $vg, implicit $vg, implicit-def $vg, implicit-def $fpmr
  %cleanup = alloca i8, align 1
  invoke void @may_throw()
          to label %normal_return unwind label %unwind_cleanup

normal_return:
  call void @"StreamingCompatCleanup::~StreamingCompatCleanup"(ptr %cleanup)
  ret void

unwind_cleanup:
  %eh_info = landingpad { ptr, i32 }
          cleanup
  call void @"StreamingCompatCleanup::~StreamingCompatCleanup"(ptr %cleanup)
  resume { ptr, i32 } %eh_info
}

; This is the same as "streaming_with_cleanup" but for a locally streaming function.
; The lowering of "unwind_cleanup" is expected to match "streaming_with_cleanup".
define void @locally_streaming_with_cleanup() "aarch64_pstate_sm_body" personality ptr @__gxx_personality_v0 {
  ; CHECK-LABEL: name: locally_streaming_with_cleanup
  ; CHECK: bb.0 (%ir-block.0):
  ; CHECK-NEXT:   successors: %bb.1(0x7ffff800), %bb.2(0x00000800)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   MSRpstatesvcrImm1 1, 1, csr_aarch64_smstartstop, implicit-def dead $nzcv, implicit $vg, implicit-def $vg, implicit-def $fpmr
  ; CHECK-NEXT:   EH_LABEL <mcsymbol >
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   BL @may_throw, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   EH_LABEL <mcsymbol >
  ; CHECK-NEXT:   B %bb.1
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.1.normal_return:
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   [[ADDXri:%[0-9]+]]:gpr64sp = ADDXri %stack.0.cleanup, 0, 0
  ; CHECK-NEXT:   $x0 = COPY [[ADDXri]]
  ; CHECK-NEXT:   BL @"StreamingCleanup::~StreamingCleanup", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   MSRpstatesvcrImm1 1, 0, csr_aarch64_smstartstop, implicit-def dead $nzcv, implicit $vg, implicit-def $vg, implicit-def $fpmr
  ; CHECK-NEXT:   RET_ReallyLR
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.2.unwind_cleanup (landing-pad):
  ; CHECK-NEXT:   liveins: $x0, $x1
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   EH_LABEL <mcsymbol >
  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:gpr64all = COPY killed $x1
  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:gpr64all = COPY killed $x0
  ; CHECK-NEXT:   MSRpstatesvcrImm1 1, 1, csr_aarch64_smstartstop, implicit-def dead $nzcv, implicit $vg, implicit-def $vg, implicit-def $fpmr
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   [[ADDXri1:%[0-9]+]]:gpr64sp = ADDXri %stack.0.cleanup, 0, 0
  ; CHECK-NEXT:   $x0 = COPY [[ADDXri1]]
  ; CHECK-NEXT:   BL @"StreamingCleanup::~StreamingCleanup", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   MSRpstatesvcrImm1 1, 0, csr_aarch64_smstartstop, implicit-def dead $nzcv, implicit-def $sp, implicit $vg, implicit-def $vg, implicit-def $fpmr
  ; CHECK-NEXT:   $x0 = COPY [[COPY1]]
  ; CHECK-NEXT:   BL @_Unwind_Resume, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   MSRpstatesvcrImm1 1, 1, csr_aarch64_smstartstop, implicit-def dead $nzcv, implicit $vg, implicit-def $vg, implicit-def $fpmr
  %cleanup = alloca i8, align 1
  invoke void @may_throw()
          to label %normal_return unwind label %unwind_cleanup

normal_return:
  call void @"StreamingCleanup::~StreamingCleanup"(ptr %cleanup)
  ret void

unwind_cleanup:
  %eh_info = landingpad { ptr, i32 }
          cleanup
  call void @"StreamingCleanup::~StreamingCleanup"(ptr %cleanup)
  resume { ptr, i32 } %eh_info
}

declare i32 @__gxx_personality_v0(...)