diff --git a/llvm/test/tools/llvm-profgen/inline-noprobe.test b/llvm/test/tools/llvm-profgen/inline-noprobe.test
--- a/llvm/test/tools/llvm-profgen/inline-noprobe.test
+++ b/llvm/test/tools/llvm-profgen/inline-noprobe.test
@@ -4,6 +4,8 @@
 ; RUN: FileCheck %s --input-file %t --check-prefix=CHECK-RAW-PROFILE
 ; RUN: llvm-profgen --format=text --unsymbolized-profile=%t --binary=%S/Inputs/inline-noprobe.perfbin --output=%t1
 ; RUN: FileCheck %s --input-file %t1 --check-prefix=CHECK
+; RUN: llvm-profgen --format=text --unsymbolized-profile=%t --binary=%S/Inputs/inline-noprobe.perfbin --output=%t1 --populate-zero-for-all-funcs
+; RUN: FileCheck %s --input-file %t1 --check-prefix=CHECK
 ; RUN: llvm-profgen --format=text --use-dwarf-correlation --perfscript=%S/Inputs/inline-noprobe.perfscript --binary=%S/Inputs/inline-noprobe.perfbin --output=%t
 ; RUN: FileCheck %s --input-file %t --check-prefix=CHECK
 
@@ -20,6 +22,21 @@
 CHECK:   3.2: bar:21
 CHECK:    1: 21
 
+CHECK-ALL-ZERO: bar:0:0
+CHECK-ALL-ZERO:  1: 0
+CHECK-ALL-ZERO:  5: 0
+CHECK-ALL-ZERO: foo:0:0
+CHECK-ALL-ZERO:  0: 0
+CHECK-ALL-ZERO:  2.1: 0
+CHECK-ALL-ZERO:  3: 0
+CHECK-ALL-ZERO:  3.2: 0
+CHECK-ALL-ZERO:  4: 0
+CHECK-ALL-ZERO:  3.1: bar:0
+CHECK-ALL-ZERO:   1: 0
+CHECK-ALL-ZERO:  3.2: bar:0
+CHECK-ALL-ZERO:   1: 0
+CHECK-ALL-ZERO:   7: 0
+
 CHECK-RAW-PROFILE:      3
 CHECK-RAW-PROFILE-NEXT: 650-691:21
 CHECK-RAW-PROFILE-NEXT: 669-677:20
diff --git a/llvm/tools/llvm-profgen/ProfileGenerator.cpp b/llvm/tools/llvm-profgen/ProfileGenerator.cpp
--- a/llvm/tools/llvm-profgen/ProfileGenerator.cpp
+++ b/llvm/tools/llvm-profgen/ProfileGenerator.cpp
@@ -36,6 +36,11 @@
     "populate-profile-symbol-list", cl::init(false), cl::Hidden,
     cl::desc("Populate profile symbol list (only meaningful for -extbinary)"));
 
+static cl::opt<bool> FillZeroForAllFuncs(
+    "fill-zero-for-all-funcs", cl::init(false), cl::Hidden,
+    cl::desc("Attribute all functions's range with zero count "
+             "even it's not hit by any samples."));
+
 static cl::opt<int32_t, true> RecursionCompression(
     "compress-recursion",
     cl::desc("Compressing recursion by deduplicating adjacent frame "
@@ -347,14 +352,22 @@
 RangeSample
 ProfileGenerator::preprocessRangeCounter(const RangeSample &RangeCounter) {
   RangeSample Ranges(RangeCounter.begin(), RangeCounter.end());
-  // For each range, we search for all ranges of the function it belongs to and
-  // initialize it with zero count, so it remains zero if doesn't hit any
-  // samples. This is to be consistent with compiler that interpret zero count
-  // as unexecuted(cold).
-  for (auto I : RangeCounter) {
-    uint64_t StartOffset = I.first.first;
-    for (const auto &Range : Binary->getRangesForOffset(StartOffset))
-      Ranges[{Range.first, Range.second - 1}] += 0;
+  if (FillZeroForAllFuncs) {
+    for (auto &FuncI : Binary->getAllBinaryFunctions()) {
+      for (auto &R : FuncI.second.Ranges) {
+        Ranges[{R.first, R.second}] += 0;
+      }
+    }
+  } else {
+    // For each range, we search for all ranges of the function it belongs to
+    // and initialize it with zero count, so it remains zero if doesn't hit any
+    // samples. This is to be consistent with compiler that interpret zero count
+    // as unexecuted(cold).
+    for (auto I : RangeCounter) {
+      uint64_t StartOffset = I.first.first;
+      for (const auto &Range : Binary->getRangesForOffset(StartOffset))
+        Ranges[{Range.first, Range.second - 1}] += 0;
+    }
   }
   RangeSample DisjointRanges;
   findDisjointRanges(DisjointRanges, Ranges);
@@ -643,7 +656,7 @@
       CSProfMergeColdContext = false;
   }
 
-  // Trim and merge cold context profile using cold threshold above. 
+  // Trim and merge cold context profile using cold threshold above.
   if (CSProfTrimColdContext || CSProfMergeColdContext) {
     SampleContextTrimmer(ProfileMap)
         .trimAndMergeColdContextProfiles(
diff --git a/llvm/tools/llvm-profgen/ProfiledBinary.h b/llvm/tools/llvm-profgen/ProfiledBinary.h
--- a/llvm/tools/llvm-profgen/ProfiledBinary.h
+++ b/llvm/tools/llvm-profgen/ProfiledBinary.h
@@ -384,6 +384,11 @@
     return FRange->Func->Ranges;
   }
 
+  const std::unordered_map<std::string, BinaryFunction> &
+  getAllBinaryFunctions() {
+    return BinaryFunctions;
+  }
+
   uint32_t getFuncSizeForContext(SampleContext &Context) {
     return FuncSizeTracker.getFuncSizeForContext(Context);
   }