Revert r270569 (teach llvm-mc to generate compressed debug sections in zlib
style). It appears that current ELF linkers are not ready for this.

llvm-svn: 270638
diff --git a/llvm/test/MC/ELF/compression.s b/llvm/test/MC/ELF/compression.s
index f66ddd5..509b507 100644
--- a/llvm/test/MC/ELF/compression.s
+++ b/llvm/test/MC/ELF/compression.s
@@ -3,7 +3,6 @@
 // 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
-// RUN: llvm-readobj -sections %t | FileCheck --check-prefix=ZLIB %s
 
 // REQUIRES: zlib
 
@@ -14,14 +13,10 @@
 
 // CHECK: Contents of section .debug_info:
 
-// Check that debug_line section was not renamed, so it is
-// zlib-style, not zlib-gnu one. Check that SHF_COMPRESSED was set.
-// ZLIB:      Section {
-// ZLIB:        Index:
-// ZLIB:        Name: .debug_str
-// ZLIB-NEXT:   Type: SHT_PROGBITS
-// ZLIB-NEXT:   Flags [
-// ZLIB-NEXT:     SHF_COMPRESSED
+// 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:
@@ -36,7 +31,7 @@
 // sections, so make sure we handle symbols inside compressed sections
 // 386-SYMBOLS: Name: .Linfo_string0
 // 386-SYMBOLS-NOT: }
-// 386-SYMBOLS: Section: .debug_str
+// 386-SYMBOLS: Section: .zdebug_str
 
 	.section	.debug_line,"",@progbits