6e2804ce6b
Summary: Places orphan sections into a unique output section. This prevents the merging of orphan sections of the same name. Matches behaviour of GNU ld --unique. --unique=pattern is not implemented. Motivated user case shown in the test has 2 local symbols as they would appear if C++ source has been compiled with -ffunction-sections. The merging of these sections in the case of a partial link (-r) may limit the effectiveness of -gc-sections of a subsequent link. Reviewers: espindola, jhenderson, bd1976llvm, edd, andrewng, JonChesterfield, MaskRay, grimar, ruiu, psmith Reviewed By: MaskRay, grimar Subscribers: emaste, arichardson, MaskRay, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D75536
27 lines
706 B
ArmAsm
27 lines
706 B
ArmAsm
# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
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.section .foo,"a",@progbits,unique,1
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.byte 1
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.section .foo,"a",@progbits,unique,2
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.byte 2
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.section .foo,"a",@progbits,unique,3
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.byte 3
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## We should have 3 instances of orphan section foo.
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## Test with -r
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# RUN: ld.lld %t.o -o %t.elf --unique
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# RUN: llvm-readelf -S %t.elf | FileCheck %s
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# CHECK-COUNT-3: .foo
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# CHECK-NOT: .foo
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## Test that --unique does not affect sections specified in output section descriptions.
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# RUN: echo 'SECTIONS { .foo : { *(.foo) }}' > %t.script
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# RUN: ld.lld %t.o -o %t2.elf -T %t.script --unique
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# RUN: llvm-readelf -S %t2.elf | FileCheck --check-prefix SCRIPT %s
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# SCRIPT: .foo
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# SCRIPT-NOT: .foo
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