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[MC/ELF] - Fixed insufficient compression.s test 

Main problem that .debug_info
section was used to check that llvm-dwarfdump is able to decompress
data that was compressed with llvm-mc tool. This section was not compressed
actually, because consumes more space in compressed view.

I changed testcase to use .debug_str section which is one that
is really compressed. So currently test do what is probably was expected to do:
checks that "data"->llvm-mc->llvm-dwarfdump->dumps back initial "data".

Differential revision: http://reviews.llvm.org/D20466

llvm-svn: 270560
This commit is contained in:
George Rimar 2016-05-24 13:45:29 +00:00
parent 879ad8fa99
commit d92694eed7
1 changed files with 13 additions and 9 deletions
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22
llvm/test/MC/ELF/compression.s
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@ -1,16 +1,11 @@
// RUN: llvm-mc -filetype=obj -compress-debug-sections -triple x86_64-pc-linux-gnu < %s -o %t
// RUN: llvm-objdump -s %t | FileCheck %s
// RUN: llvm-dwarfdump -debug-dump=info %t | FileCheck --check-prefix=INFO %s
// RUN: llvm-dwarfdump -debug-dump=str %t | FileCheck --check-prefix=STR %s
// RUN: llvm-mc -filetype=obj -compress-debug-sections -triple i386-pc-linux-gnu < %s \
// RUN: | llvm-readobj -symbols - | FileCheck --check-prefix=386-SYMBOLS %s
// REQUIRES: zlib
// CHECK: Contents of section .zdebug_line:
// Check for the 'ZLIB' file magic at the start of the section only
// CHECK-NEXT: ZLIB
// CHECK-NOT: ZLIB
// Don't compress small sections, such as this simple debug_abbrev example
// CHECK: Contents of section .debug_abbrev:
// CHECK-NOT: ZLIB
@ -18,13 +13,19 @@
// CHECK: Contents of section .debug_info:
// CHECK: Contents of section .zdebug_str:
// Check for the 'ZLIB' file magic at the start of the section only
// CHECK-NEXT: ZLIB
// CHECK-NOT: ZLIB
// FIXME: Handle compressing alignment fragments to support compressing debug_frame
// CHECK: Contents of section .debug_frame:
// CHECK-NOT: ZLIB
// CHECK: Contents of
// Decompress one valid dwarf section just to check that this roundtrips
// INFO: 0x00000000: Compile Unit: length = 0x0000000c version = 0x0004 abbr_offset = 0x0000 addr_size = 0x08 (next unit at 0x00000010)
// Decompress one valid dwarf section just to check that this roundtrips,
// we use .zdebug_str section for that
// STR: perfectly compressable data sample *****************************************
// In x86 32 bit named symbols are used for temporary symbols in merge
// sections, so make sure we handle symbols inside compressed sections
@ -74,6 +75,9 @@ foo:
.cfi_endproc
.cfi_sections .debug_frame
# Below is the section we will use to check that after compression with llvm-mc,
# llvm-dwarfdump tool will be able to decompress data back and dump it. Data sample
# should be compressable enough, so it is filled with some amount of equal symbols at the end
.section .debug_str,"MS",@progbits,1
.Linfo_string0:
.asciz "compress this "
.asciz "perfectly compressable data sample *****************************************"