188 lines
5.2 KiB
ArmAsm
188 lines
5.2 KiB
ArmAsm
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// This test checks that the epilogue is packed where possible.
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// RUN: llvm-mc -triple aarch64-pc-win32 -filetype=obj %s -o %t.o
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// RUN: llvm-readobj -u %t.o | FileCheck %s
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// CHECK: UnwindInformation [
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// CHECK-NEXT: RuntimeFunction {
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// CHECK-NEXT: Function: func
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// CHECK-NEXT: ExceptionRecord: .xdata
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// CHECK-NEXT: ExceptionData {
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// CHECK-NEXT: FunctionLength:
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// CHECK-NEXT: Version:
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// CHECK-NEXT: ExceptionData:
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// CHECK-NEXT: EpiloguePacked: Yes
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// CHECK-NEXT: EpilogueOffset: 2
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// CHECK-NEXT: ByteCodeLength:
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// CHECK-NEXT: Prologue [
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// CHECK-NEXT: 0xdc04 ; str d8, [sp, #32]
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// CHECK-NEXT: 0xe1 ; mov fp, sp
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// CHECK-NEXT: 0x42 ; stp x29, x30, [sp, #16]
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// CHECK-NEXT: 0x85 ; stp x29, x30, [sp, #-48]!
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// CHECK-NEXT: 0xe6 ; save next
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// CHECK-NEXT: 0x24 ; stp x19, x20, [sp, #-32]!
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// CHECK-NEXT: 0xc842 ; stp x20, x21, [sp, #16]
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// CHECK-NEXT: 0x03 ; sub sp, #48
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// CHECK-NEXT: 0xe4 ; end
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// CHECK-NEXT: ]
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// CHECK-NEXT: Epilogue [
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// CHECK-NEXT: 0xe1 ; mov sp, fp
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// CHECK-NEXT: 0x42 ; ldp x29, x30, [sp, #16]
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// CHECK-NEXT: 0x85 ; ldp x29, x30, [sp], #48
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// CHECK-NEXT: 0xe6 ; restore next
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// CHECK-NEXT: 0x24 ; ldp x19, x20, [sp], #32
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// CHECK-NEXT: 0xc842 ; ldp x20, x21, [sp, #16]
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// CHECK-NEXT: 0x03 ; add sp, #48
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// CHECK-NEXT: 0xe4 ; end
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// CHECK-NEXT: ]
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// CHECK-NEXT: }
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// CHECK-NEXT: }
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// CHECK: RuntimeFunction {
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// CHECK-NEXT: Function: packed2
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// CHECK-NEXT: ExceptionRecord:
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// CHECK-NEXT: ExceptionData {
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// CHECK: ExceptionData:
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// CHECK-NEXT: EpiloguePacked: Yes
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// CHECK: RuntimeFunction {
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// CHECK-NEXT: Function: nonpacked1
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// CHECK-NEXT: ExceptionRecord:
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// CHECK-NEXT: ExceptionData {
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// CHECK: ExceptionData:
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// CHECK-NEXT: EpiloguePacked: No
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// CHECK: RuntimeFunction {
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// CHECK-NEXT: Function: nonpacked2
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// CHECK-NEXT: ExceptionRecord:
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// CHECK-NEXT: ExceptionData {
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// CHECK: ExceptionData:
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// CHECK-NEXT: EpiloguePacked: No
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// CHECK: RuntimeFunction {
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// CHECK-NEXT: Function: nonpacked3
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// CHECK-NEXT: ExceptionRecord:
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// CHECK-NEXT: ExceptionData {
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// CHECK: ExceptionData:
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// CHECK-NEXT: EpiloguePacked: No
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.text
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.globl func
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.seh_proc func
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func:
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sub sp, sp, #48
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.seh_stackalloc 48
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// Check that canonical opcode forms (r19r20_x, fplr, fplr_x, save_next,
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// set_fp) are treated as a match even if one (in prologue or epilogue)
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// was simplified from the more generic opcodes.
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stp x20, x21, [sp, #16]
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.seh_save_regp x20, 16
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stp x19, x20, [sp, #-32]!
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.seh_save_r19r20_x 32
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stp x21, x22, [sp, #16]
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.seh_save_regp x21, 16
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stp x29, x30, [sp, #-48]!
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.seh_save_regp_x x29, 48
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stp x29, x30, [sp, #16]
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.seh_save_regp x29, 16
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add x29, sp, #0
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.seh_add_fp 0
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str d8, [sp, #32]
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.seh_save_freg d8, 32
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.seh_endprologue
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nop
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.seh_startepilogue
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mov sp, x29
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.seh_set_fp
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ldp x29, x30, [sp, #16]
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.seh_save_fplr 16
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ldp x29, x30, [sp, #-48]!
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.seh_save_fplr_x 48
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ldp x21, x22, [sp, #16]
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.seh_save_next
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ldp x19, x20, [sp], #32
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.seh_save_regp_x x19, 32
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ldp x20, x21, [sp, #16]
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.seh_save_regp x20, 16
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add sp, sp, #48
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.seh_stackalloc 48
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.seh_endepilogue
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ret
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.seh_endproc
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// Test a perfectly matching epilog with no offset.
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.seh_proc packed2
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packed2:
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sub sp, sp, #48
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.seh_stackalloc 48
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stp x29, lr, [sp, #-32]!
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.seh_save_fplr_x 32
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.seh_endprologue
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nop
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.seh_startepilogue
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ldp x29, lr, [sp], #32
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.seh_save_fplr_x 32
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add sp, sp, #48
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.seh_stackalloc 48
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.seh_endepilogue
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ret
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.seh_endproc
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.seh_proc nonpacked1
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nonpacked1:
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sub sp, sp, #48
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.seh_stackalloc 48
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.seh_endprologue
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nop
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.seh_startepilogue
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add sp, sp, #48
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.seh_stackalloc 48
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.seh_endepilogue
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// This epilogue isn't packed with the prologue, as it doesn't align with
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// the end of the function (one extra nop before the ret).
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nop
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ret
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.seh_endproc
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.seh_proc nonpacked2
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nonpacked2:
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sub sp, sp, #48
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.seh_stackalloc 48
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sub sp, sp, #32
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.seh_stackalloc 32
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.seh_endprologue
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nop
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.seh_startepilogue
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// Not packed; the epilogue mismatches at the second opcode.
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add sp, sp, #16
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.seh_stackalloc 16
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add sp, sp, #48
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.seh_stackalloc 48
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.seh_endepilogue
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ret
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.seh_endproc
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.seh_proc nonpacked3
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nonpacked3:
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sub sp, sp, #48
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.seh_stackalloc 48
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sub sp, sp, #32
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.seh_stackalloc 32
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.seh_endprologue
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nop
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.seh_startepilogue
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// Not packed; the epilogue is longer than the prologue.
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mov sp, x29
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.seh_set_fp
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add sp, sp, #32
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.seh_stackalloc 32
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add sp, sp, #48
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.seh_stackalloc 48
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.seh_endepilogue
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ret
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.seh_endproc
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