# RUN: llc -o - %s -mtriple=aarch64-windows -start-after=prologepilog -filetype=obj \
# RUN: | llvm-readobj --unwind - | FileCheck %s
# RUN: llc -o - %s -mtriple=aarch64-windows -run-pass=aarch64-ldst-opt \
# RUN: | FileCheck %s --check-prefix=CHECK-LDSTOPT
# This test case checks the basic validity of the .xdata section. It's
# documented at:
# https://docs.microsoft.com/en-us/cpp/build/arm64-exception-handling
# Also test the generated assembler SEH directives.
# RUN: llc -o - %s -mtriple=aarch64-windows -start-after=prologepilog -filetype=asm \
# RUN: | FileCheck %s --check-prefix=ASM
# We expect to see the following in the .xdata section:
# CHECK: ExceptionData {
# CHECK-NEXT: FunctionLength: 96
# CHECK-NEXT: Version: 0
# CHECK-NEXT: ExceptionData: No
# CHECK-NEXT: EpiloguePacked: Yes
# CHECK-NEXT: EpilogueOffset: 13
# CHECK-NEXT: ByteCodeLength: 28
# CHECK-NEXT: Prologue [
# CHECK-NEXT: 0xc808 ; stp x19, x20, [sp, #64]
# CHECK-NEXT: 0xd0c7 ; str x22, [sp, #56]
# CHECK-NEXT: 0xd086 ; str x21, [sp, #48]
# CHECK-NEXT: 0xc904 ; stp x23, x24, [sp, #32]
# CHECK-NEXT: 0xc982 ; stp x25, x26, [sp, #16]
# CHECK-NEXT: 0xce09 ; stp x27, x28, [sp, #-80]!
# CHECK-NEXT: 0xe4 ; end
# CHECK-NEXT: ]
# CHECK-NEXT: Epilogue [
# CHECK-NEXT: 0xc808 ; ldp x19, x20, [sp, #64]
# CHECK-NEXT: 0xd086 ; ldr x21, [sp, #48]
# CHECK-NEXT: 0xe3 ; nop
# CHECK-NEXT: 0xd0c7 ; ldr x22, [sp, #56]
# CHECK-NEXT: 0xc904 ; ldp x23, x24, [sp, #32]
# CHECK-NEXT: 0xc982 ; ldp x25, x26, [sp, #16]
# CHECK-NEXT: 0xce09 ; ldp x27, x28, [sp], #80
# CHECK-NEXT: 0xe4 ; end
# CHECK-NEXT: ]
# CHECK-NEXT: }
# Check that the load-store optimizer does not merge the two
# callee-saved stores in the prologue.
# CHECK-LDSTOPT: name: test
# CHECK-LDSTOPT: frame-setup STRXui killed $x21, $sp, 6
# CHECK-LDSTOPT: frame-setup STRXui killed $x22, $sp, 7
# ASM-LABEL: test:
# ASM: .seh_proc test
# ASM: .seh_save_regp_x x27, 80
# ASM: .seh_save_regp x25, 16
# ASM: .seh_save_regp x23, 32
# ASM: .seh_save_reg x21, 48
# ASM: .seh_save_reg x22, 56
# ASM: .seh_save_regp x19, 64
# ASM: .seh_endprologue
# ASM: .seh_startepilogue
# ASM: .seh_save_regp x19, 64
# ASM: .seh_save_reg x21, 48
# ASM: .seh_nop
# ASM: .seh_save_reg x22, 56
# ASM: .seh_save_regp x23, 32
# ASM: .seh_save_regp x25, 16
# ASM: .seh_save_regp_x x27, 80
# ASM: .seh_endepilogue
# ASM: .seh_endfunclet
# ASM: .seh_endproc
...
---
name: test
alignment: 4
tracksRegLiveness: true
hasWinCFI: true
liveins:
- { reg: '$w0' }
frameInfo:
stackSize: 80
maxAlignment: 8
maxCallFrameSize: 0
hasOpaqueSPAdjustment: true
stack:
- { id: 0, type: spill-slot, offset: -8, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$x19' }
- { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$x20' }
- { id: 2, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$x21' }
- { id: 3, type: spill-slot, offset: -32, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$x22' }
- { id: 4, type: spill-slot, offset: -40, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$x23' }
- { id: 5, type: spill-slot, offset: -48, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$x24' }
- { id: 6, type: spill-slot, offset: -56, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$x25' }
- { id: 7, type: spill-slot, offset: -64, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$x26' }
- { id: 8, type: spill-slot, offset: -72, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$x27' }
- { id: 9, type: spill-slot, offset: -80, size: 8, alignment: 8, stack-id: default,
callee-saved-register: '$x28' }
body: |
bb.0.entry:
liveins: $x0, $x1, $x27, $x28, $x25, $x26, $x23, $x24, $x21, $x22, $x19, $x20
early-clobber $sp = frame-setup STPXpre killed $x27, killed $x28, $sp, -10 :: (store (s64) into %stack.8), (store (s64) into %stack.9)
frame-setup SEH_SaveRegP_X 27, 28, -80
frame-setup STPXi killed $x25, killed $x26, $sp, 2 :: (store (s64) into %stack.6), (store (s64) into %stack.7)
frame-setup SEH_SaveRegP 25, 26, 16
frame-setup STPXi killed $x23, killed $x24, $sp, 4 :: (store (s64) into %stack.4), (store (s64) into %stack.5)
frame-setup SEH_SaveRegP 23, 24, 32
frame-setup STRXui killed $x21, $sp, 6 :: (store (s64) into %stack.2)
frame-setup SEH_SaveReg 21, 48
frame-setup STRXui killed $x22, $sp, 7 :: (store (s64) into %stack.3)
frame-setup SEH_SaveReg 22, 56
frame-setup STPXi killed $x19, killed $x20, $sp, 8 :: (store (s64) into %stack.0), (store (s64) into %stack.1)
frame-setup SEH_SaveRegP 19, 20, 64
frame-setup SEH_PrologEnd
$x19 = ADDXrr $x0, killed $x1
$x20 = ADDXrr $x19, killed $x0
$x21 = ADDXrr $x20, killed $x19
$x22 = ADDXrr $x21, killed $x20
$x23 = ADDXrr $x22, killed $x21
$x24 = ADDXrr $x23, killed $x22
$x25 = ADDXrr $x24, killed $x23
$x26 = ADDXrr $x25, killed $x24
$x27 = ADDXrr $x26, killed $x25
$x28 = ADDXrr $x27, killed $x26
frame-destroy SEH_EpilogStart
$x19, $x20 = frame-destroy LDPXi $sp, 8 :: (load (s64) from %stack.0), (load (s64) from %stack.1)
frame-destroy SEH_SaveRegP 19, 20, 64
$x21 = frame-destroy LDRXui $sp, 6 :: (load (s64) from %stack.2)
frame-destroy SEH_SaveReg 21, 48
$x0 = COPY $x28
frame-destroy SEH_Nop
$x21 = frame-destroy LDRXui $sp, 6 :: (load (s64) from %stack.2)
frame-destroy SEH_SaveReg 22, 56
$x23, $x24 = frame-destroy LDPXi $sp, 4 :: (load (s64) from %stack.4), (load (s64) from %stack.5)
frame-destroy SEH_SaveRegP 23, 24, 32
$x25, $x26 = frame-destroy LDPXi $sp, 2 :: (load (s64) from %stack.6), (load (s64) from %stack.7)
frame-destroy SEH_SaveRegP 25, 26, 16
early-clobber $sp, $x27, $x28 = frame-destroy LDPXpost $sp, 10 :: (load (s64) from %stack.8), (load (s64) from %stack.9)
frame-destroy SEH_SaveRegP_X 27, 28, -80
frame-destroy SEH_EpilogEnd
RET_ReallyLR implicit $x0
...
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