forked from OSchip/llvm-project
71 lines
2.1 KiB
ArmAsm
71 lines
2.1 KiB
ArmAsm
# REQUIRES: x86
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# RUN: llvm-mc -triple=x86_64-windows-gnu %s -filetype=obj -o %t1.obj
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# RUN: llvm-mc -triple=x86_64-windows-gnu %S/Inputs/comdat-jumptable2.s -filetype=obj -o %t2.obj
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# RUN: llvm-objdump -s %t1.obj | FileCheck --check-prefix=OBJ1 %s
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# RUN: llvm-objdump -s %t2.obj | FileCheck --check-prefix=OBJ2 %s
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# RUN: lld-link -lldmingw -entry:main %t1.obj %t2.obj -out:%t.exe
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# RUN: llvm-objdump -s %t.exe | FileCheck --check-prefix=EXE %s
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# Test linking cases where comdat functions have an associated jump table
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# in a non-comdat rdata (which GCC produces for functions with jump tables).
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# In these cases, ld.bfd keeps all rdata sections, but the relocations that
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# refer to discarded comdat sections just are emitted as they were originally.
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# In real scenarios, the jump table .rdata section should be identical across
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# all object files; here it is different to illustrate more clearly what
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# the linker actually does.
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# OBJ1: Contents of section .rdata:
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# OBJ1: 0000 aaaaaaaa 14000000 1e000000 28000000
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# OBJ1: 0010 bbbbbbbb
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# OBJ2: Contents of section .rdata:
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# OBJ2: 0000 cccccccc 14000000 1e000000 28000000
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# OBJ2: 0010 dddddddd
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# EXE: Contents of section .rdata:
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# EXE: 140002000 aaaaaaaa 0c100000 12100000 18100000
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# EXE: 140002010 bbbbbbbb cccccccc 14000000 1e000000
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# EXE: 140002020 28000000 dddddddd
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.section .text@comdatfunc, "x"
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.linkonce discard
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.globl comdatfunc
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comdatfunc:
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leaq .Ljumptable(%rip), %rax
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movslq (%rax, %rcx, 4), %rcx
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addq %rcx, %rax
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jmp *%rax
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.section .rdata, "dr"
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.long 0xaaaaaaaa
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.Ljumptable:
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.long .Ltail1-.Ljumptable
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.long .Ltail2-.Ljumptable
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.long .Ltail3-.Ljumptable
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.long 0xbbbbbbbb
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.section .text@comdatfunc, "x"
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# If assembled with binutils, the following line can be kept in:
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# .linkonce discard
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.Ltail1:
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movl $1, %eax
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ret
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.Ltail2:
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movl $2, %eax
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ret
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.Ltail3:
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movl $3, %eax
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ret
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.text
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.globl main
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main:
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call comdatfunc
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call otherfunc
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ret
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