c579a5b1d9
DWARF sections are typically live and not COMDAT, so they would be treated as GC roots. Enabling DWARF would essentially keep all code with debug info alive, preventing any section GC. Fixes PR45273 Reviewed By: mstorsjo, MaskRay Differential Revision: https://reviews.llvm.org/D76935
61 lines
1.4 KiB
ArmAsm
61 lines
1.4 KiB
ArmAsm
# REQUIRES: x86
|
|
|
|
# RUN: llvm-mc -triple=x86_64-windows-msvc %s -filetype=obj -o %t.obj
|
|
# RUN: lld-link -lldmap:%t.map -out:%t.exe -opt:ref -entry:main %t.obj -verbose 2>&1 | FileCheck %s
|
|
# RUN: FileCheck %s --check-prefix=MAP --input-file=%t.map
|
|
|
|
# CHECK: Discarded unused1
|
|
# CHECK-NEXT: Discarded unused2
|
|
# CHECK-NOT: Discarded
|
|
|
|
# MAP: In Symbol
|
|
# MAP: gc-dwarf.s.tmp.obj:(.text)
|
|
# MAP: {{ main$}}
|
|
# MAP: gc-dwarf.s.tmp.obj:(.text)
|
|
# MAP: {{ used$}}
|
|
|
|
.def @feat.00; .scl 3; .type 0; .endef
|
|
.globl @feat.00
|
|
.set @feat.00, 0
|
|
|
|
.def main; .scl 2; .type 32; .endef
|
|
.section .text,"xr",one_only,main
|
|
.globl main
|
|
main:
|
|
callq used
|
|
xorl %eax, %eax
|
|
retq
|
|
|
|
.def used; .scl 2; .type 32; .endef
|
|
.section .text,"xr",one_only,used
|
|
.globl used
|
|
used:
|
|
retq
|
|
|
|
|
|
.def unused1; .scl 2; .type 32; .endef
|
|
.section .text,"xr",one_only,unused1
|
|
.globl unused1
|
|
unused1:
|
|
retq
|
|
|
|
.def unused2; .scl 2; .type 32; .endef
|
|
.section .text,"xr",one_only,unused2
|
|
.globl unused2
|
|
unused2:
|
|
retq
|
|
|
|
# This isn't valid DWARF, but LLD doesn't care. Make up some data that
|
|
# references the functions above.
|
|
.section .debug_info,"r"
|
|
.long main@IMGREL
|
|
.long unused1@IMGREL
|
|
.long unused2@IMGREL
|
|
|
|
# Similarly, .eh_frame unwind info should not keep functions alive. Again, this
|
|
# is not valid unwind info, but it doesn't matter for testing purposes.
|
|
.section .eh_frame,"r"
|
|
.long main@IMGREL
|
|
.long unused1@IMGREL
|
|
.long unused2@IMGREL
|