// This test checks various cases around sharing opcodes between epilogue and prologue with more than one epilogue.
// RUN: llvm-mc -triple thumbv7-pc-win32 -filetype=obj %s | llvm-readobj -u - | FileCheck %s
// CHECK: RuntimeFunction {
// CHECK-NEXT: Function: func1
// CHECK-NEXT: ExceptionRecord:
// CHECK-NEXT: ExceptionData {
// CHECK-NEXT: FunctionLength:
// CHECK-NEXT: Version:
// CHECK-NEXT: ExceptionData:
// CHECK-NEXT: EpiloguePacked: No
// CHECK-NEXT: Fragment:
// CHECK-NEXT: EpilogueScopes: 3
// CHECK-NEXT: ByteCodeLength: 12
// CHECK-NEXT: Prologue [
// CHECK-NEXT: 0xf5 0x15 ; vpush {d1-d5}
// CHECK-NEXT: 0x05 ; sub sp, #(5 * 4)
// CHECK-NEXT: 0xa0 0xf0 ; push.w {r4-r7, lr}
// CHECK-NEXT: ]
// CHECK-NEXT: EpilogueScopes [
// CHECK-NEXT: EpilogueScope {
// CHECK-NEXT: StartOffset: 6
// CHECK-NEXT: Condition: 14
// CHECK-NEXT: EpilogueStartIndex: 6
// CHECK-NEXT: Opcodes [
// CHECK-NEXT: 0x08 ; add sp, #(8 * 4)
// CHECK-NEXT: 0xfd ; bx <reg>
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NEXT: EpilogueScope {
// CHECK-NEXT: StartOffset: 9
// CHECK-NEXT: Condition: 14
// CHECK-NEXT: EpilogueStartIndex: 8
// CHECK-NEXT: Opcodes [
// CHECK-NEXT: 0x10 ; add sp, #(16 * 4)
// CHECK-NEXT: 0xfd ; bx <reg>
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NEXT: EpilogueScope {
// CHECK-NEXT: StartOffset: 13
// CHECK-NEXT: Condition: 10
// CHECK-NEXT: EpilogueStartIndex: 6
// CHECK-NEXT: Opcodes [
// CHECK-NEXT: 0x08 ; add sp, #(8 * 4)
// CHECK-NEXT: 0xfd ; bx <reg>
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NEXT: }
// CHECK-NEXT: RuntimeFunction {
// CHECK-NEXT: Function: func2
// CHECK-NEXT: ExceptionRecord:
// CHECK-NEXT: ExceptionData {
// CHECK-NEXT: FunctionLength:
// CHECK-NEXT: Version:
// CHECK-NEXT: ExceptionData:
// CHECK-NEXT: EpiloguePacked: No
// CHECK-NEXT: Fragment:
// CHECK-NEXT: EpilogueScopes: 3
// CHECK-NEXT: ByteCodeLength: 12
// CHECK-NEXT: Prologue [
// CHECK-NEXT: 0xf5 0x15 ; vpush {d1-d5}
// CHECK-NEXT: 0x05 ; sub sp, #(5 * 4)
// CHECK-NEXT: 0xa0 0xf0 ; push.w {r4-r7, lr}
// CHECK-NEXT: 0xfe ; b.w <target>
// CHECK-NEXT: ]
// CHECK-NEXT: EpilogueScopes [
// CHECK-NEXT: EpilogueScope {
// CHECK-NEXT: StartOffset: 6
// CHECK-NEXT: Condition: 14
// CHECK-NEXT: EpilogueStartIndex: 2
// CHECK-NEXT: Opcodes [
// CHECK-NEXT: 0x05 ; add sp, #(5 * 4)
// CHECK-NEXT: 0xa0 0xf0 ; pop.w {r4-r7, pc}
// CHECK-NEXT: 0xfe ; b.w <target>
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NEXT: EpilogueScope {
// CHECK-NEXT: StartOffset: 11
// CHECK-NEXT: Condition: 14
// CHECK-NEXT: EpilogueStartIndex: 3
// CHECK-NEXT: Opcodes [
// CHECK-NEXT: 0xa0 0xf0 ; pop.w {r4-r7, pc}
// CHECK-NEXT: 0xfe ; b.w <target>
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NEXT: EpilogueScope {
// CHECK-NEXT: StartOffset: 15
// CHECK-NEXT: Condition: 14
// CHECK-NEXT: EpilogueStartIndex: 6
// CHECK-NEXT: Opcodes [
// CHECK-NEXT: 0xa0 0xf0 ; pop.w {r4-r7, pc}
// CHECK-NEXT: 0xfd ; bx <reg>
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NEXT: ]
// CHECK-NEXT: }
// CHECK-NEXT: }
.text
.syntax unified
.seh_proc func1
func1:
push.w {r4-r7,lr}
.seh_save_regs_w {r4-r7,lr}
sub sp, sp, #20
.seh_stackalloc 20
vpush {d1-d5}
.seh_save_fregs {d1-d5}
.seh_endprologue
nop
// Entirely different epilogue; can't be shared with the prologue.
.seh_startepilogue
add sp, sp, #32
.seh_stackalloc 32
bx lr
.seh_nop
.seh_endepilogue
nop
// Also a differing epilogue.
.seh_startepilogue
add sp, sp, #64
.seh_stackalloc 64
bx lr
.seh_nop
.seh_endepilogue
nop
// Epilogue matches the first one; will reuse that epilogue's opcodes,
// even if they differ in conditionality.
itt ge
.seh_startepilogue_cond ge
addge sp, sp, #32
.seh_stackalloc 32
bxge lr
.seh_nop
.seh_endepilogue
.seh_endproc
.seh_proc func2
func2:
push.w {r4-r7,lr}
.seh_save_regs_w {r4-r7,lr}
sub sp, sp, #20
.seh_stackalloc 20
vpush {d1-d5}
.seh_save_fregs {d1-d5}
.seh_endprologue
nop
.seh_startepilogue
add sp, sp, #20
.seh_stackalloc 20
// As we're popping into lr instead of directly into pc, this pop
// becomes a wide instruction. To match prologue vs epilogue, the
// push in the prologue has been made wide too.
pop.w {r4-r7,lr}
.seh_save_regs_w {r4-r7,lr}
b.w tailcall
// Ending with a different end opcode, but can still be shared with
// the prolog.
.seh_nop_w
.seh_endepilogue
// Another epilogue, matching the end of the previous epilogue.
.seh_startepilogue
pop.w {r4-r7,lr}
.seh_save_regs_w {r4-r7,lr}
b.w tailcall
.seh_nop_w
.seh_endepilogue
// This epilogue differs in the end opcode, and can't be shared with
// the prologue.
.seh_startepilogue
pop.w {r4-r7,lr}
.seh_save_regs_w {r4-r7,lr}
bx lr
.seh_nop
.seh_endepilogue
.seh_endproc
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