Index: lld/ELF/InputSection.cpp
===================================================================
--- lld/ELF/InputSection.cpp
+++ lld/ELF/InputSection.cpp
@@ -73,6 +73,16 @@
   this->Alignment = V;
 }
 
+// Drop SHF_GROUP bit unless we are producing a re-linkable object file.
+// SHF_GROUP is a marker that a section belongs to some comdat group.
+// That flag doesn't make sense in an executable.
+static uint64_t getFlags(uint64_t Flags) {
+  Flags &= ~(uint64_t)SHF_INFO_LINK;
+  if (!Config->Relocatable)
+    Flags &= ~(uint64_t)SHF_GROUP;
+  return Flags;
+}
+
 // GNU assembler 2.24 and LLVM 4.0.0's MC (the newest release as of
 // March 2017) fail to infer section types for sections starting with
 // ".init_array." or ".fini_array.". They set SHT_PROGBITS instead of
@@ -95,7 +105,7 @@
 InputSectionBase::InputSectionBase(elf::ObjectFile<ELFT> *File,
                                    const typename ELFT::Shdr *Hdr,
                                    StringRef Name, Kind SectionKind)
-    : InputSectionBase(File, Hdr->sh_flags & ~SHF_INFO_LINK,
+    : InputSectionBase(File, getFlags(Hdr->sh_flags),
                        getType(Hdr->sh_type, Name), Hdr->sh_entsize,
                        Hdr->sh_link, Hdr->sh_info, Hdr->sh_addralign,
                        getSectionContents(File, Hdr), Name, SectionKind) {
Index: lld/ELF/OutputSections.cpp
===================================================================
--- lld/ELF/OutputSections.cpp
+++ lld/ELF/OutputSections.cpp
@@ -313,10 +313,6 @@
     return;
   }
 
-  uint64_t Flags = IS->Flags;
-  if (!Config->Relocatable)
-    Flags &= ~(uint64_t)SHF_GROUP;
-
   if (Sec) {
     if (getIncompatibleFlags(Sec->Flags) != getIncompatibleFlags(IS->Flags))
       error("incompatible section flags for " + Sec->Name +
@@ -333,9 +329,9 @@
               "\n>>> output section " + Sec->Name + ": " +
               getELFSectionTypeName(Config->EMachine, Sec->Type));
     }
-    Sec->Flags |= Flags;
+    Sec->Flags |= IS->Flags;
   } else {
-    Sec = make<OutputSection>(OutsecName, IS->Type, Flags);
+    Sec = make<OutputSection>(OutsecName, IS->Type, IS->Flags);
     OutputSections.push_back(Sec);
   }
 
Index: lld/test/ELF/arm-icf-exidx.s
===================================================================
--- lld/test/ELF/arm-icf-exidx.s
+++ lld/test/ELF/arm-icf-exidx.s
@@ -19,13 +19,15 @@
  .section .text.h
  .global __aeabi_unwind_cpp_pr0
 __aeabi_unwind_cpp_pr0:
+ nop
  bx lr
 
 // CHECK: Disassembly of section .text:
 // CHECK-NEXT: f:
 // CHECK-NEXT:    11000:        1e ff 2f e1     bx      lr
 // CHECK: __aeabi_unwind_cpp_pr0:
-// CHECK-NEXT:    11004:        1e ff 2f e1     bx      lr
+// CHECK-NEXT:    11004:        00 f0 20 e3     nop
+// CHECK-NEXT:    11008:        1e ff 2f e1     bx      lr
 
 // CHECK: Contents of section .ARM.exidx:
 // CHECK-NEXT:  100d4 2c0f0000 b0b0b080 280f0000 01000000
Index: lld/test/ELF/icf-comdat.s
===================================================================
--- /dev/null
+++ lld/test/ELF/icf-comdat.s
@@ -0,0 +1,23 @@
+# REQUIRES: x86
+
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
+# RUN: ld.lld %t -o %t2 --icf=all --verbose | FileCheck %s
+
+# CHECK: selected .text.f1
+# CHECK:   removed .text.f2
+
+.globl _start, f1, f2
+_start:
+  ret
+
+.section .text.f1,"ax"
+f1:
+  mov $60, %rax
+  mov $42, %rdi
+  syscall
+
+.section .text.f2,"axG",@progbits,foo,comdat
+f2:
+  mov $60, %rax
+  mov $42, %rdi
+  syscall