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llvm-project/lld/test/ELF/tail-merge-string-align.s

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Add support for merging strings with alignment larger than one char. This reduces the .rodata of scyladb from 4501932 to 4334639 bytes (1.038 times smaller). I don't think it is critical to support tail merging, just exact duplicates, but given the code organization it was actually a bit easier to support both. llvm-svn: 261327
2016-02-19 22:17:40 +08:00
// REQUIRES: x86
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
// RUN: ld.lld %t.o -o %t.so -shared -O3
[test] Change llvm-readobj -long-option to --long-option or well-known short options. NFC Also change some options that have different semantics (cause confusion) in llvm-readelf mode: -s => -S -t => --symbols -sd => --section-data llvm-svn: 359651
2019-05-01 13:49:01 +08:00
// RUN: llvm-readobj -S --section-data %t.so | FileCheck %s
Add support for merging strings with alignment larger than one char. This reduces the .rodata of scyladb from 4501932 to 4334639 bytes (1.038 times smaller). I don't think it is critical to support tail merging, just exact duplicates, but given the code organization it was actually a bit easier to support both. llvm-svn: 261327
2016-02-19 22:17:40 +08:00
.section .rodata.4a,"aMS",@progbits,1
.align 4
.asciz "abcdef"
.section .rodata.4b,"aMS",@progbits,1
.align 4
.asciz "ef"
.section .rodata.4c,"aMS",@progbits,1
.align 4
.asciz "f"
// CHECK: Name: .rodata
// CHECK-NEXT: Type: SHT_PROGBITS
// CHECK-NEXT: Flags [
// CHECK-NEXT: SHF_ALLOC
// CHECK-NEXT: SHF_MERGE
// CHECK-NEXT: SHF_STRINGS
// CHECK-NEXT: ]
// CHECK-NEXT: Address:
// CHECK-NEXT: Offset:
// CHECK-NEXT: Size: 1
// CHECK-NEXT: Link: 0
// CHECK-NEXT: Info: 0
// CHECK-NEXT: AddressAlignment: 4
// CHECK-NEXT: EntrySize:
// CHECK-NEXT: SectionData (
// CHECK-NEXT: 0000: 61626364 65660000 6600 |abcdef..f.|
// CHECK-NEXT: )