# REQUIRES: x86, zlib

# RUN: yaml2obj %s -o %t.o

# RUN: ld.lld %t.o -o %t.default --compress-debug-sections=zlib
# RUN: llvm-readelf --sections %t.default | FileCheck -check-prefixes=HEADER,LEVEL1 %s

# RUN: ld.lld -O0 %t.o -o %t.O0 --compress-debug-sections=zlib
# RUN: llvm-readelf --sections %t.O0 | FileCheck -check-prefixes=HEADER,LEVEL1 %s
# RUN: cmp %t.default %t.O0

# RUN: ld.lld -O1 %t.o -o %t.O1 --compress-debug-sections=zlib
# RUN: llvm-readelf --sections %t.O1 | FileCheck -check-prefixes=HEADER,LEVEL1 %s
# RUN: cmp %t.default %t.O1

# RUN: ld.lld -O2 %t.o -o %t.O2 --compress-debug-sections=zlib
# RUN: llvm-readelf --sections %t.O2 | FileCheck -check-prefixes=HEADER,LEVEL6 %s

## LLD uses zlib compression of level 1 when -O0, -O1 and level 6 when -O2.
## Here we check how -O flag affects the size of compressed sections produced.

# HEADER: [Nr] Name        Type     Address  Off    Size
# LEVEL1: [ 1] .debug_info PROGBITS 00000000 000094 00001c
# LEVEL6: [ 1] .debug_info PROGBITS 00000000 000094 00001a

## A little arbitrary debug section which has a different size after
## applying compression of level 1 and 6.

--- !ELF
FileHeader:
  Class:   ELFCLASS32
  Data:    ELFDATA2LSB
  Type:    ET_REL
  Machine: EM_386
Sections:
  - Name:    .debug_info
    Type:    SHT_PROGBITS
    Content: '010101010101010201010201'