derek.holloway
7502bf64a4
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190 lines
6.1 KiB
ArmAsm
190 lines
6.1 KiB
ArmAsm
// This test checks various cases around sharing opcodes between epilogue and prologue with more than one epilogue.
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// RUN: llvm-mc -triple thumbv7-pc-win32 -filetype=obj %s | llvm-readobj -u - | FileCheck %s
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// CHECK: RuntimeFunction {
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// CHECK-NEXT: Function: func1
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// CHECK-NEXT: ExceptionRecord:
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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: No
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// CHECK-NEXT: Fragment:
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// CHECK-NEXT: EpilogueScopes: 3
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// CHECK-NEXT: ByteCodeLength: 12
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// CHECK-NEXT: Prologue [
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// CHECK-NEXT: 0xf5 0x15 ; vpush {d1-d5}
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// CHECK-NEXT: 0x05 ; sub sp, #(5 * 4)
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// CHECK-NEXT: 0xa0 0xf0 ; push.w {r4-r7, lr}
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// CHECK-NEXT: ]
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// CHECK-NEXT: EpilogueScopes [
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// CHECK-NEXT: EpilogueScope {
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// CHECK-NEXT: StartOffset: 6
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// CHECK-NEXT: Condition: 14
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// CHECK-NEXT: EpilogueStartIndex: 6
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// CHECK-NEXT: Opcodes [
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// CHECK-NEXT: 0x08 ; add sp, #(8 * 4)
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// CHECK-NEXT: 0xfd ; bx <reg>
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// CHECK-NEXT: ]
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// CHECK-NEXT: }
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// CHECK-NEXT: EpilogueScope {
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// CHECK-NEXT: StartOffset: 9
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// CHECK-NEXT: Condition: 14
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// CHECK-NEXT: EpilogueStartIndex: 8
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// CHECK-NEXT: Opcodes [
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// CHECK-NEXT: 0x10 ; add sp, #(16 * 4)
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// CHECK-NEXT: 0xfd ; bx <reg>
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// CHECK-NEXT: ]
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// CHECK-NEXT: }
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// CHECK-NEXT: EpilogueScope {
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// CHECK-NEXT: StartOffset: 13
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// CHECK-NEXT: Condition: 10
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// CHECK-NEXT: EpilogueStartIndex: 6
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// CHECK-NEXT: Opcodes [
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// CHECK-NEXT: 0x08 ; add sp, #(8 * 4)
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// CHECK-NEXT: 0xfd ; bx <reg>
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// CHECK-NEXT: ]
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// CHECK-NEXT: }
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// CHECK-NEXT: ]
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// CHECK-NEXT: }
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// CHECK-NEXT: }
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// CHECK-NEXT: RuntimeFunction {
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// CHECK-NEXT: Function: func2
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// CHECK-NEXT: ExceptionRecord:
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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: No
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// CHECK-NEXT: Fragment:
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// CHECK-NEXT: EpilogueScopes: 3
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// CHECK-NEXT: ByteCodeLength: 12
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// CHECK-NEXT: Prologue [
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// CHECK-NEXT: 0xf5 0x15 ; vpush {d1-d5}
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// CHECK-NEXT: 0x05 ; sub sp, #(5 * 4)
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// CHECK-NEXT: 0xa0 0xf0 ; push.w {r4-r7, lr}
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// CHECK-NEXT: 0xfe ; b.w <target>
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// CHECK-NEXT: ]
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// CHECK-NEXT: EpilogueScopes [
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// CHECK-NEXT: EpilogueScope {
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// CHECK-NEXT: StartOffset: 6
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// CHECK-NEXT: Condition: 14
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// CHECK-NEXT: EpilogueStartIndex: 2
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// CHECK-NEXT: Opcodes [
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// CHECK-NEXT: 0x05 ; add sp, #(5 * 4)
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// CHECK-NEXT: 0xa0 0xf0 ; pop.w {r4-r7, pc}
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// CHECK-NEXT: 0xfe ; b.w <target>
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// CHECK-NEXT: ]
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// CHECK-NEXT: }
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// CHECK-NEXT: EpilogueScope {
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// CHECK-NEXT: StartOffset: 11
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// CHECK-NEXT: Condition: 14
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// CHECK-NEXT: EpilogueStartIndex: 3
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// CHECK-NEXT: Opcodes [
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// CHECK-NEXT: 0xa0 0xf0 ; pop.w {r4-r7, pc}
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// CHECK-NEXT: 0xfe ; b.w <target>
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// CHECK-NEXT: ]
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// CHECK-NEXT: }
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// CHECK-NEXT: EpilogueScope {
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// CHECK-NEXT: StartOffset: 15
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// CHECK-NEXT: Condition: 14
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// CHECK-NEXT: EpilogueStartIndex: 6
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// CHECK-NEXT: Opcodes [
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// CHECK-NEXT: 0xa0 0xf0 ; pop.w {r4-r7, pc}
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// CHECK-NEXT: 0xfd ; bx <reg>
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// CHECK-NEXT: ]
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// CHECK-NEXT: }
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// CHECK-NEXT: ]
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// CHECK-NEXT: }
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// CHECK-NEXT: }
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.text
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.syntax unified
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.seh_proc func1
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func1:
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push.w {r4-r7,lr}
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.seh_save_regs_w {r4-r7,lr}
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sub sp, sp, #20
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.seh_stackalloc 20
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vpush {d1-d5}
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.seh_save_fregs {d1-d5}
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.seh_endprologue
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nop
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// Entirely different epilogue; can't be shared with the prologue.
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.seh_startepilogue
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add sp, sp, #32
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.seh_stackalloc 32
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bx lr
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.seh_nop
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.seh_endepilogue
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nop
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// Also a differing epilogue.
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.seh_startepilogue
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add sp, sp, #64
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.seh_stackalloc 64
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bx lr
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.seh_nop
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.seh_endepilogue
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nop
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// Epilogue matches the first one; will reuse that epilogue's opcodes,
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// even if they differ in conditionality.
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itt ge
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.seh_startepilogue_cond ge
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addge sp, sp, #32
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.seh_stackalloc 32
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bxge lr
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.seh_nop
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.seh_endepilogue
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.seh_endproc
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.seh_proc func2
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func2:
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push.w {r4-r7,lr}
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.seh_save_regs_w {r4-r7,lr}
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sub sp, sp, #20
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.seh_stackalloc 20
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vpush {d1-d5}
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.seh_save_fregs {d1-d5}
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.seh_endprologue
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nop
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.seh_startepilogue
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add sp, sp, #20
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.seh_stackalloc 20
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// As we're popping into lr instead of directly into pc, this pop
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// becomes a wide instruction. To match prologue vs epilogue, the
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// push in the prologue has been made wide too.
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pop.w {r4-r7,lr}
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.seh_save_regs_w {r4-r7,lr}
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b.w tailcall
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// Ending with a different end opcode, but can still be shared with
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// the prolog.
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.seh_nop_w
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.seh_endepilogue
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// Another epilogue, matching the end of the previous epilogue.
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.seh_startepilogue
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pop.w {r4-r7,lr}
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.seh_save_regs_w {r4-r7,lr}
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b.w tailcall
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.seh_nop_w
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.seh_endepilogue
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// This epilogue differs in the end opcode, and can't be shared with
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// the prologue.
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.seh_startepilogue
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pop.w {r4-r7,lr}
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.seh_save_regs_w {r4-r7,lr}
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bx lr
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.seh_nop
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.seh_endepilogue
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.seh_endproc
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