llvm/test/CodeGen/AArch64/seh-unreachable-loop.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 6
# RUN: llc -o - %s -mtriple=aarch64-pc-windows-msvc19.33.0 -run-pass=branch-folder | FileCheck %s

# Check that the dead blocks in bb.2 and bb.3 are correctly handled by BranchFolders EHScopeMembership.

--- |
  declare i32 @__CxxFrameHandler3(...)

  declare ptr @"??2@YAPEAX_K@Z"(i64)

  define ptr @test(ptr writeonly captures(none) %0, ptr captures(none) %1) personality ptr @__CxxFrameHandler3 {
    unreachable
  }
...
---
name:            test
tracksRegLiveness: true
hasEHContTarget: false
hasEHScopes:     true
hasEHFunclets:   true
body:             |
  ; CHECK-LABEL: name: test
  ; CHECK: bb.0:
  ; CHECK-NEXT:   successors: %bb.1(0x7ffff800), %bb.2(0x00000800)
  ; CHECK-NEXT:   liveins: $x0, $x1, $x20, $x19, $lr
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   early-clobber $sp = frame-setup STPXpre killed $x19, killed $x20, $sp, -6 :: (store (s64)), (store (s64))
  ; CHECK-NEXT:   frame-setup SEH_SaveRegP_X 19, 20, -48
  ; CHECK-NEXT:   frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store (s64)), (store (s64))
  ; CHECK-NEXT:   frame-setup SEH_SaveFPLR 16
  ; CHECK-NEXT:   $fp = frame-setup ADDXri $sp, 16, 0
  ; CHECK-NEXT:   frame-setup SEH_AddFP 16
  ; CHECK-NEXT:   frame-setup SEH_PrologEnd
  ; CHECK-NEXT:   $x2 = MOVi64imm -2
  ; CHECK-NEXT:   STURXi killed $x2, $fp, 16
  ; CHECK-NEXT:   renamable $x20 = COPY $x1
  ; CHECK-NEXT:   renamable $x19 = COPY $x0
  ; CHECK-NEXT:   EH_LABEL <mcsymbol .Ltmp0>
  ; CHECK-NEXT:   $x0 = COPY $xzr
  ; CHECK-NEXT:   BL @"??2@YAPEAX_K@Z", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp, implicit-def $x0
  ; CHECK-NEXT:   EH_LABEL <mcsymbol .Ltmp0>
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.1:
  ; CHECK-NEXT:   liveins: $x0, $x19, $x20
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   STRXui $xzr, renamable $x20, 1 :: (store (s64), align 1)
  ; CHECK-NEXT:   STRXui $xzr, renamable $x20, 0 :: (store (s64), align 1)
  ; CHECK-NEXT:   STRXui $xzr, killed renamable $x20, 2 :: (store (s64), align 1)
  ; CHECK-NEXT:   STRXui killed renamable $x0, renamable $x19, 0 :: (store (s64))
  ; CHECK-NEXT:   $x0 = COPY $xzr
  ; CHECK-NEXT:   frame-destroy SEH_EpilogStart
  ; CHECK-NEXT:   $fp, $lr = frame-destroy LDPXi $sp, 2 :: (load (s64)), (load (s64))
  ; CHECK-NEXT:   frame-destroy SEH_SaveFPLR 16
  ; CHECK-NEXT:   early-clobber $sp, $x19, $x20 = frame-destroy LDPXpost $sp, 6 :: (load (s64)), (load (s64))
  ; CHECK-NEXT:   frame-destroy SEH_SaveRegP_X 19, 20, -48
  ; CHECK-NEXT:   frame-destroy SEH_EpilogEnd
  ; CHECK-NEXT:   RET_ReallyLR implicit $x0
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.2 (landing-pad, ehfunclet-entry, ehscope-entry):
  ; CHECK-NEXT:   liveins: $x20, $x19, $lr
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   early-clobber $sp = frame-setup STPXpre killed $x19, killed $x20, $sp, -4 :: (store (s64)), (store (s64))
  ; CHECK-NEXT:   frame-setup SEH_SaveRegP_X 19, 20, -32
  ; CHECK-NEXT:   frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store (s64)), (store (s64))
  ; CHECK-NEXT:   frame-setup SEH_SaveFPLR 16
  ; CHECK-NEXT:   frame-setup SEH_PrologEnd
  ; CHECK-NEXT:   renamable $x8 = COPY $xzr
  ; CHECK-NEXT:   STRWui $wzr, killed renamable $x8, 0 :: (volatile store (s32) into `ptr null`, align 4294967296)
  ; CHECK-NEXT:   frame-destroy SEH_EpilogStart
  ; CHECK-NEXT:   $fp, $lr = frame-destroy LDPXi $sp, 2 :: (load (s64)), (load (s64))
  ; CHECK-NEXT:   frame-destroy SEH_SaveFPLR 16
  ; CHECK-NEXT:   early-clobber $sp, $x19, $x20 = frame-destroy LDPXpost $sp, 4 :: (load (s64)), (load (s64))
  ; CHECK-NEXT:   frame-destroy SEH_SaveRegP_X 19, 20, -32
  ; CHECK-NEXT:   frame-destroy SEH_EpilogEnd
  ; CHECK-NEXT:   CLEANUPRET
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.3:
  ; CHECK-NEXT:   successors: %bb.3(0x80000000)
  ; CHECK-NEXT:   liveins: $x8
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   early-clobber renamable $x8 = STRXpost $xzr, killed renamable $x8, -8 :: (store (s64))
  ; CHECK-NEXT:   B %bb.3
  bb.0:
    successors: %bb.1(0x7ffff800), %bb.5(0x00000800)
    liveins: $x0, $x1, $x20, $x19, $lr

    early-clobber $sp = frame-setup STPXpre killed $x19, killed $x20, $sp, -6 :: (store (s64)), (store (s64))
    frame-setup SEH_SaveRegP_X 19, 20, -48
    frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store (s64)), (store (s64))
    frame-setup SEH_SaveFPLR 16
    $fp = frame-setup ADDXri $sp, 16, 0
    frame-setup SEH_AddFP 16
    frame-setup SEH_PrologEnd
    $x2 = MOVi64imm -2
    STURXi killed $x2, $fp, 16
    renamable $x20 = COPY $x1
    renamable $x19 = COPY $x0
    EH_LABEL <mcsymbol .Ltmp0>
    $x0 = COPY $xzr
    BL @"??2@YAPEAX_K@Z", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp, implicit-def $x0
    EH_LABEL <mcsymbol .Ltmp0>
    B %bb.1

  bb.1:
    successors: %bb.4(0x30000000)
    liveins: $x0, $x19, $x20

    STRXui $xzr, renamable $x20, 1 :: (store (s64), align 1)
    STRXui $xzr, renamable $x20, 0 :: (store (s64), align 1)
    STRXui $xzr, killed renamable $x20, 2 :: (store (s64), align 1)
    STRXui killed renamable $x0, renamable $x19, 0 :: (store (s64))
    B %bb.4

  bb.2:
    successors: %bb.3(0x80000000)
    liveins: $x19

    renamable $x8 = SUBXri killed renamable $x19, 8, 0

  bb.3:
    successors: %bb.3(0x80000000)
    liveins: $x8

    early-clobber renamable $x8 = STRXpost $xzr, killed renamable $x8, -8 :: (store (s64))
    B %bb.3

  bb.4:
    $x0 = COPY $xzr
    frame-destroy SEH_EpilogStart
    $fp, $lr = frame-destroy LDPXi $sp, 2 :: (load (s64)), (load (s64))
    frame-destroy SEH_SaveFPLR 16
    early-clobber $sp, $x19, $x20 = frame-destroy LDPXpost $sp, 6 :: (load (s64)), (load (s64))
    frame-destroy SEH_SaveRegP_X 19, 20, -48
    frame-destroy SEH_EpilogEnd
    RET_ReallyLR implicit $x0

  bb.5 (landing-pad, ehfunclet-entry, ehscope-entry):
    liveins: $x20, $x19, $lr

    early-clobber $sp = frame-setup STPXpre killed $x19, killed $x20, $sp, -4 :: (store (s64)), (store (s64))
    frame-setup SEH_SaveRegP_X 19, 20, -32
    frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store (s64)), (store (s64))
    frame-setup SEH_SaveFPLR 16
    frame-setup SEH_PrologEnd
    renamable $x8 = COPY $xzr
    STRWui $wzr, killed renamable $x8, 0 :: (volatile store (s32) into `ptr null`, align 4294967296)
    frame-destroy SEH_EpilogStart
    $fp, $lr = frame-destroy LDPXi $sp, 2 :: (load (s64)), (load (s64))
    frame-destroy SEH_SaveFPLR 16
    early-clobber $sp, $x19, $x20 = frame-destroy LDPXpost $sp, 4 :: (load (s64)), (load (s64))
    frame-destroy SEH_SaveRegP_X 19, 20, -32
    frame-destroy SEH_EpilogEnd
    CLEANUPRET
...