Index: lib/CodeGen/CodeGenModule.cpp
===================================================================
--- lib/CodeGen/CodeGenModule.cpp
+++ lib/CodeGen/CodeGenModule.cpp
@@ -396,6 +396,10 @@
       AddGlobalCtor(OpenMPRegistrationFunction, 0);
   if (PGOReader) {
     getModule().setMaximumFunctionCount(PGOReader->getMaximumFunctionCount());
+    auto *SummaryMD = PGOReader->getSummary().getMD(getModule().getContext());
+    // Make sure returned metadata is non-null;
+    assert(SummaryMD);
+    getModule().setProfileSummary(SummaryMD);
     if (PGOStats.hasDiagnostics())
       PGOStats.reportDiagnostics(getDiags(), getCodeGenOpts().MainFileName);
   }
Index: test/Profile/Inputs/profile-summary.proftext
===================================================================
--- /dev/null
+++ test/Profile/Inputs/profile-summary.proftext
@@ -0,0 +1,26 @@
+begin
+# Func Hash:
+2859428334838410
+# Num Counters:
+10
+# Counter Values:
+8000002
+3
+2
+2
+3
+72
+720
+7200
+72000
+720000
+
+main
+# Func Hash:
+4
+# Num Counters:
+2
+# Counter Values:
+1
+4000001
+
Index: test/Profile/profile-summary.c
===================================================================
--- /dev/null
+++ test/Profile/profile-summary.c
@@ -0,0 +1,60 @@
+// Test that profile summary is set correctly.
+
+// RUN: llvm-profdata merge %S/Inputs/profile-summary.proftext -o %t.profdata
+// RUN: %clang %s -o - -mllvm -disable-llvm-optzns -emit-llvm -S -fprofile-instr-use=%t.profdata | FileCheck %s
+//
+int begin(int i) {
+  if (!(i % 4000000))
+    i++;
+  if (!(i % 3000000))
+    i++;
+  if (!(i % 2000000))
+    i++;
+  if (!(i % 1000000))
+    i++;
+  if (!(i % 100000))
+    i++;
+  if (!(i % 10000))
+    i++;
+  if (!(i % 1000))
+    i++;
+  if (!(i % 100))
+    i++;
+  if (!(i % 10))
+    i++;
+  return 0;
+}
+
+int main(int argc, const char *argv[]) {
+  for (int i = 0; i <= 4000000; i++) {
+    begin(i);
+    begin(1000000 - i);
+  }
+  return 0;
+}
+// CHECK: {{![0-9]+}} = !{i32 1, !"ProfileSummary", {{![0-9]+}}}
+// CHECK: {{![0-9]+}} = !{!"ProfileFormat", !"InstrProf"}
+// CHECK: {{![0-9]+}} = !{!"TotalCount", i64 12800006}
+// CHECK: {{![0-9]+}} = !{!"MaxBlockCount", i64 8000002}
+// CHECK: {{![0-9]+}} = !{!"MaxInternalBlockCount", i64 4000001}
+// CHECK: {{![0-9]+}} = !{!"MaxFunctionCount", i64 8000002}
+// CHECK: {{![0-9]+}} = !{!"NumBlocks", i64 12}
+// CHECK: {{![0-9]+}} = !{!"NumFunctions", i64 2}
+// CHECK: {{![0-9]+}} = !{!"DetailedSummary", [[DETAILS:![0-9]+]]}
+// CHECK: [[DETAILS]] = !{{{(![0-9]+, )+}}{{![0-9]+}}}
+// CHECK: {{![0-9]+}} = !{i32 10000, i64 8000002, i32 1}
+// CHECK: {{![0-9]+}} = !{i32 100000, i64 8000002, i32 1}
+// CHECK: {{![0-9]+}} = !{i32 200000, i64 8000002, i32 1}
+// CHECK: {{![0-9]+}} = !{i32 300000, i64 8000002, i32 1}
+// CHECK: {{![0-9]+}} = !{i32 400000, i64 8000002, i32 1}
+// CHECK: {{![0-9]+}} = !{i32 500000, i64 8000002, i32 1}
+// CHECK: {{![0-9]+}} = !{i32 600000, i64 8000002, i32 1}
+// CHECK: {{![0-9]+}} = !{i32 700000, i64 4000001, i32 2}
+// CHECK: {{![0-9]+}} = !{i32 800000, i64 4000001, i32 2}
+// CHECK: {{![0-9]+}} = !{i32 900000, i64 4000001, i32 2}
+// CHECK: {{![0-9]+}} = !{i32 950000, i64 720000, i32 3}
+// CHECK: {{![0-9]+}} = !{i32 990000, i64 720000, i32 3}
+// CHECK: {{![0-9]+}} = !{i32 999000, i64 72000, i32 4}
+// CHECK: {{![0-9]+}} = !{i32 999900, i64 7200, i32 5}
+// CHECK: {{![0-9]+}} = !{i32 999990, i64 720, i32 6}
+// CHECK: {{![0-9]+}} = !{i32 999999, i64 72, i32 7}