Index: ELF/LinkerScript.cpp
===================================================================
--- ELF/LinkerScript.cpp
+++ ELF/LinkerScript.cpp
@@ -277,6 +277,11 @@
   typedef typename ELFT::uint uintX_t;
   uintX_t Flags = C->Flags & (SHF_MERGE | SHF_STRINGS);
 
+  // We do not do merge of sections in case when optimization is disabled,
+  // drop the flags in that case to stop produce multiple output sections.
+  if (Config->Optimize == 0)
+    Flags = 0;
+
   uintX_t Alignment = 0;
   if (isa<MergeInputSection<ELFT>>(C))
     Alignment = std::max<uintX_t>(C->Alignment, C->Entsize);
Index: test/ELF/no-merge.s
===================================================================
--- test/ELF/no-merge.s
+++ test/ELF/no-merge.s
@@ -0,0 +1,25 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
+# RUN: echo "SECTIONS { .data : {*(.data.*)} }" > %t0.script
+# RUN: ld.lld %t.o -o %t0.out --script %t0.script
+# RUN: llvm-objdump -s %t0.out | FileCheck %s --check-prefix=OPT
+# OPT:      Contents of section .data:
+# OPT-NEXT:   0000 01
+# OPT-NEXT: Contents of section .data:
+# OPT-NEXT:   0001 6100
+# OPT-NEXT: Contents of section .data:
+# OPT-NEXT:   0003 03
+
+# RUN: ld.lld -O0 %t.o -o %t1.out --script %t0.script
+# RUN: llvm-objdump -s %t1.out | FileCheck %s --check-prefix=NOOPT
+# NOOPT:      Contents of section .data:
+# NOOPT-NEXT:   0000 01610003
+
+.section .data.aw,"aw",@progbits
+.byte 1
+
+.section .data.ams,"aMS",@progbits,1
+.asciz "a"
+
+.section .data.am,"aM",@progbits,1
+.byte 3