cc073593a4
As a follow-up to #5780, disassemble the regions identified by bb_starts, falling back on disassembling the whole buffer. This ensures that instructions like br_table that introduce a lot of constants don't throw off capstone for the remainder of the function. --------- Co-authored-by: Jamey Sharp <jamey@minilop.net>
125 lines
2.4 KiB
Plaintext
125 lines
2.4 KiB
Plaintext
test compile precise-output
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set enable_probestack=true
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set probestack_strategy=inline
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; This is the default and is equivalent to a page size of 4096
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set probestack_size_log2=12
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target aarch64
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; If the stack size is just one page, we can avoid the stack probe entirely
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function %single_page() -> i64 system_v {
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ss0 = explicit_slot 2048
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block0:
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v1 = stack_addr.i64 ss0
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return v1
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}
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; VCode:
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; stp fp, lr, [sp, #-16]!
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; mov fp, sp
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; sub sp, sp, #2048
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; block0:
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; mov x0, sp
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; add sp, sp, #2048
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; ldp fp, lr, [sp], #16
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; ret
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;
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; Disassembled:
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; block0: ; offset 0x0
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; stp x29, x30, [sp, #-0x10]!
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; mov x29, sp
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; sub sp, sp, #0x800
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; block1: ; offset 0xc
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; mov x0, sp
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; add sp, sp, #0x800
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; ldp x29, x30, [sp], #0x10
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; ret
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function %unrolled() -> i64 system_v {
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ss0 = explicit_slot 12288
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block0:
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v1 = stack_addr.i64 ss0
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return v1
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}
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; VCode:
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; stp fp, lr, [sp, #-16]!
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; mov fp, sp
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; movn x16, #4095 ; str wzr, [sp, x16, SXTX]
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; movn x16, #8191 ; str wzr, [sp, x16, SXTX]
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; movn x16, #12287 ; str wzr, [sp, x16, SXTX]
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; sub sp, sp, #12288
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; block0:
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; mov x0, sp
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; add sp, sp, #12288
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; ldp fp, lr, [sp], #16
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; ret
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;
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; Disassembled:
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; block0: ; offset 0x0
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; stp x29, x30, [sp, #-0x10]!
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; mov x29, sp
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; mov x16, #-0x1000
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; str wzr, [sp, x16, sxtx]
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; mov x16, #-0x2000
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; str wzr, [sp, x16, sxtx]
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; mov x16, #-0x3000
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; str wzr, [sp, x16, sxtx]
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; sub sp, sp, #3, lsl #12
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; block1: ; offset 0x24
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; mov x0, sp
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; add sp, sp, #3, lsl #12
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; ldp x29, x30, [sp], #0x10
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; ret
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function %large() -> i64 system_v {
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ss0 = explicit_slot 100000
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block0:
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v1 = stack_addr.i64 ss0
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return v1
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}
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; VCode:
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; stp fp, lr, [sp, #-16]!
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; mov fp, sp
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; movz x16, #0
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; movz w17, #34464
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; movk w17, w17, #1, LSL #16
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; stack_probe_loop x16, x17, #4096
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; movz w16, #34464
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; movk w16, w16, #1, LSL #16
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; sub sp, sp, x16, UXTX
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; block0:
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; mov x0, sp
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; movz w16, #34464
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; movk w16, w16, #1, LSL #16
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; add sp, sp, x16, UXTX
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; ldp fp, lr, [sp], #16
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; ret
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;
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; Disassembled:
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; block0: ; offset 0x0
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; stp x29, x30, [sp, #-0x10]!
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; mov x29, sp
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; mov x16, #0
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; mov w17, #0x86a0
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; movk w17, #1, lsl #16
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; sub x16, x16, #1, lsl #12
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; str wzr, [sp, x16]
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; cmn x16, x17
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; b.gt #0x14
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; mov w16, #0x86a0
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; movk w16, #1, lsl #16
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; sub sp, sp, x16
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; block1: ; offset 0x30
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; mov x0, sp
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; mov w16, #0x86a0
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; movk w16, #1, lsl #16
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; add sp, sp, x16
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; ldp x29, x30, [sp], #0x10
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; ret
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