derek.holloway
7502bf64a4
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94 lines
1.6 KiB
ArmAsm
94 lines
1.6 KiB
ArmAsm
# Test that we will not incorrectly take the first basic block in function
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# `_foo` or the second basic block in function `_goo` as epilogue, and will
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# recognize epilogues in the other cases.
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# RUN: %clang %cflags %s -o %t.so -Wl,-q,-z,undefs
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# RUN: llvm-bolt %t.so -o %t.bolt --print-cfg | FileCheck %s
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.text
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.global _foo
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.type _foo, %function
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_foo:
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ldr w8, [sp]
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adr x10, _jmptbl
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ldrsw x9, [x10, x9, lsl #2]
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add x10, x10, x9
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br x10
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# CHECK-LABEL: _foo
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# CHECK: br x10
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# CHECK-SAME: # UNKNOWN CONTROL FLOW
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mov x0, 0
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ret
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mov x0, 1
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ret
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.balign 4
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_jmptbl:
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.long -16
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.long -8
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.global _bar
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.type _bar, %function
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_bar:
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stp x29, x30, [sp, #-0x10]!
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mov x29, sp
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sub sp, sp, #0x10
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tbnz x0, #0x3, _L2
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ldr x8, [x29, #0x30]
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blr x8
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_L2:
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add sp, sp, #0x10
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ldp x29, x30, [sp], #0x10
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br x2
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# CHECK-LABEL: _bar
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# CHECK: br x2
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# CHECK-SAME: # TAILCALL
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.global _goo
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.type _goo, %function
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_goo:
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ldr w8, [sp]
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adr x10, _jmptbl2
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ldrsw x9, [x10, x9, lsl #2]
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add x10, x10, x9
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str x30, [sp, #-0x10]!
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bl _bar
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ldr x30, [sp], #0x10
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mov x1, x0
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mov x0, xzr
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br x10
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# CHECK-LABEL: _goo
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# CHECK: br x10
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# CHECK-SAME: # UNKNOWN CONTROL FLOW
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mov x0, 0
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ret
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mov x0, 1
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ret
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.balign 4
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_jmptbl2:
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.long -16
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.long -8
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.global _faz
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.type _faz, %function
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_faz:
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str x30, [sp, #-0x10]!
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tbnz x0, #0x1, _L3
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bl _bar
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_L3:
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ldr x30, [sp], #0x10
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mov x0, x1
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br x3
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# CHECK-LABEL: _faz
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# CHECK: br x3
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# CHECK-SAME: # TAILCALL
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.global _start
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.type _start, %function
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_start:
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ret
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# Dummy relocation to force relocation mode
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.reloc 0, R_AARCH64_NONE
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