Index: include/llvm/ProfileData/SampleProf.h
===================================================================
--- include/llvm/ProfileData/SampleProf.h
+++ include/llvm/ProfileData/SampleProf.h
@@ -360,9 +360,7 @@
                              uint64_t Threshold) const {
     if (TotalSamples <= Threshold)
       return;
-    Function *F = M->getFunction(Name);
-    if (!F || !F->getSubprogram())
-      S.insert(Function::getGUID(Name));
+    S.insert(Function::getGUID(Name));
     // Import hot CallTargets, which may not be available in IR because full
     // profile annotation cannot be done until backend compilation in ThinLTO.
     for (const auto &BS : BodySamples)
Index: test/Transforms/SampleProfile/Inputs/import.prof
===================================================================
--- test/Transforms/SampleProfile/Inputs/import.prof
+++ test/Transforms/SampleProfile/Inputs/import.prof
@@ -6,3 +6,5 @@
   1: 1000
  4: foo2:1000
   1: 1000 foo3:1000
+ 4: foo_available:1000
+  1: 1000
Index: test/Transforms/SampleProfile/import.ll
===================================================================
--- test/Transforms/SampleProfile/import.ll
+++ test/Transforms/SampleProfile/import.ll
@@ -5,6 +5,10 @@
 
 declare void @foo()
 
+define void @foo_available() !dbg !11 {
+  ret void
+}
+
 define void @test(void ()*) !dbg !7 {
   %2 = alloca void ()*
   store void ()* %0, void ()** %2
@@ -17,7 +21,7 @@
 
 ; GUIDs of foo, bar, foo1, foo2 and foo3 should be included in the metadata to
 ; make sure hot inline stacks are imported.
-; CHECK: !{!"function_entry_count", i64 1, i64 2494702099028631698, i64 6699318081062747564, i64 7682762345278052905,  i64 -7908226060800700466, i64 -2012135647395072713}
+; CHECK: !{!"function_entry_count", i64 1, i64 2494702099028631698, i64 4005816710939881937, i64 6699318081062747564, i64 7682762345278052905,  i64 -7908226060800700466, i64 -2012135647395072713}
 
 !llvm.dbg.cu = !{!0}
 !llvm.module.flags = !{!8, !9}
@@ -31,6 +35,7 @@
 !8 = !{i32 2, !"Dwarf Version", i32 4}
 !9 = !{i32 1, !"Debug Info Version", i32 3}
 !10 = !{!"clang version 3.5 "}
+!11 = distinct !DISubprogram(name: "foo_available", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 7, file: !1, scope: !1, type: !6, variables: !2)
 !15 = !DILexicalBlockFile(discriminator: 1, file: !1, scope: !7)
 !17 = distinct !DILexicalBlock(line: 10, column: 0, file: !1, scope: !7)
 !18 = !DILocation(line: 10, scope: !17)