Index: ELF/Driver.cpp
===================================================================
--- ELF/Driver.cpp
+++ ELF/Driver.cpp
@@ -1342,9 +1342,18 @@
   // Apply symbol renames for -wrap.
   Symtab->applySymbolWrap();
 
-  // Now that we have a complete list of input files.
-  // Beyond this point, no new files are added.
-  // Aggregate all input sections into one place.
+  // Now that we have a complete list of input files. Beyond this point, no new
+  // files are added. Aggregate all input sections into one place.
+  //
+  // At this point, the list might be not empty and contain synthetic sections
+  // created for common symbols. We want to move them to the end of input
+  // sections list. That way they will be grouped with other synthetics we will
+  // add. This helps sometimes to resolve relocations properly. For example,
+  // gcc/x86_64-linux-gnu/5.4.0/crtbegin.o has 32bit relocation against it's
+  // own .bss. If user's code has huge common symbol, it would be placed at the
+  // start of ".bss" and may cause overflow.
+  std::vector<InputSectionBase *> Commons;
+  Commons.swap(InputSections);
   for (InputFile *F : ObjectFiles)
     for (InputSectionBase *S : F->getSections())
       if (S && S != &InputSection::Discarded)
@@ -1352,6 +1361,8 @@
   for (BinaryFile *F : BinaryFiles)
     for (InputSectionBase *S : F->getSections())
       InputSections.push_back(cast<InputSection>(S));
+  for (InputSectionBase *S : Commons)
+    InputSections.push_back(S);
 
   // We do not want to emit debug sections if --strip-all
   // or -strip-debug are given.
Index: test/ELF/bss-reloc-overflow.s
===================================================================
--- test/ELF/bss-reloc-overflow.s
+++ test/ELF/bss-reloc-overflow.s
@@ -0,0 +1,15 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
+# RUN: ld.lld %t -o %t2
+
+## Previously we were not able to link this code.
+## It has R_X86_64_PC32 relocation which overflowed.
+
+.text
+.long .bss - .
+
+.bss
+.byte 0x0
+
+.type arr,@object
+.comm arr,0xffffffff,4