diff --git a/lld/ELF/Config.h b/lld/ELF/Config.h
--- a/lld/ELF/Config.h
+++ b/lld/ELF/Config.h
@@ -175,6 +175,7 @@
   bool ltoEmitAsm;
   bool ltoNewPassManager;
   bool ltoUniqueBasicBlockSectionNames;
+  bool ltoSplitMachineFunctions;
   bool ltoWholeProgramVisibility;
   bool mergeArmExidx;
   bool mipsN32Abi = false;
diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp
--- a/lld/ELF/Driver.cpp
+++ b/lld/ELF/Driver.cpp
@@ -973,6 +973,9 @@
   config->ltoUniqueBasicBlockSectionNames =
       args.hasFlag(OPT_lto_unique_basic_block_section_names,
                    OPT_no_lto_unique_basic_block_section_names, false);
+  config->ltoSplitMachineFunctions =
+      args.hasFlag(OPT_lto_split_machine_functions,
+                   OPT_no_lto_split_machine_functions, false);
   config->mapFile = args.getLastArgValue(OPT_Map);
   config->mipsGotSize = args::getInteger(args, OPT_mips_got_size, 0xfff0);
   config->mergeArmExidx =
diff --git a/lld/ELF/LTO.cpp b/lld/ELF/LTO.cpp
--- a/lld/ELF/LTO.cpp
+++ b/lld/ELF/LTO.cpp
@@ -115,6 +115,8 @@
   c.Options.UniqueBasicBlockSectionNames =
       config->ltoUniqueBasicBlockSectionNames;
 
+  c.Options.EnableMachineFunctionSplitter = config->ltoSplitMachineFunctions;
+
   if (auto relocModel = getRelocModelFromCMModel())
     c.RelocModel = *relocModel;
   else if (config->relocatable)
diff --git a/lld/ELF/Options.td b/lld/ELF/Options.td
--- a/lld/ELF/Options.td
+++ b/lld/ELF/Options.td
@@ -557,6 +557,9 @@
 defm lto_unique_basic_block_section_names: BB<"lto-unique-basic-block-section-names",
     "Give unique names to every basic block section for LTO",
     "Do not give unique names to every basic block section for LTO (default)">;
+defm lto_split_machine_functions: BB<"lto-split-machine-functions",
+     "Enable late function splitting using profile information for LTO (x86 ELF)",
+     "Disable late function splitting using profile information for LTO (x86 ELF)">;
 def shuffle_sections: JJ<"shuffle-sections=">, MetaVarName<"<seed>">,
   HelpText<"Shuffle input sections using the given seed. If 0, use a random seed">;
 def thinlto_cache_dir: JJ<"thinlto-cache-dir=">,
diff --git a/lld/test/ELF/lto/split-machine-functions.ll b/lld/test/ELF/lto/split-machine-functions.ll
new file mode 100644
--- /dev/null
+++ b/lld/test/ELF/lto/split-machine-functions.ll
@@ -0,0 +1,52 @@
+; REQUIRES: x86
+; RUN: llvm-as %s -o %t.o
+; RUN: ld.lld %t.o -o %t --lto-split-machine-functions --lto-O0 --save-temps
+; RUN: llvm-nm %t.lto.o | FileCheck %s
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @foo1(i1 zeroext %0) nounwind !prof !14 !section_prefix !15 {
+;; Check that cold block is split out with new symbol. 
+; CHECK:  foo1.cold
+  br i1 %0, label %2, label %4, !prof !17
+
+2:                                                ; preds = %1
+  %3 = call i32 @bar()
+  br label %6
+
+4:                                                ; preds = %1
+  %5 = call i32 @baz()
+  br label %6
+
+6:                                                ; preds = %4, %2
+  ret void
+}
+
+define i32 @bar() noinline optnone { 
+  ret i32 1; 
+} 
+
+define i32 @baz() noinline optnone { 
+  ret i32 1; 
+} 
+
+!llvm.module.flags = !{!0}
+!0 = !{i32 1, !"ProfileSummary", !1}
+!1 = !{!2, !3, !4, !5, !6, !7, !8, !9}
+!2 = !{!"ProfileFormat", !"InstrProf"}
+!3 = !{!"TotalCount", i64 10000}
+!4 = !{!"MaxCount", i64 10}
+!5 = !{!"MaxInternalCount", i64 1}
+!6 = !{!"MaxFunctionCount", i64 1000}
+!7 = !{!"NumCounts", i64 3}
+!8 = !{!"NumFunctions", i64 5}
+!9 = !{!"DetailedSummary", !10}
+!10 = !{!11, !12, !13}
+!11 = !{i32 10000, i64 100, i32 1}
+!12 = !{i32 999900, i64 100, i32 1}
+!13 = !{i32 999999, i64 1, i32 2}
+!14 = !{!"function_entry_count", i64 7000}
+!15 = !{!"function_section_prefix", !".hot"}
+!16 = !{!"function_section_prefix", !".unlikely"}
+!17 = !{!"branch_weights", i32 7000, i32 0}