Index: lib/Transforms/IPO/PartialInlining.cpp
===================================================================
--- lib/Transforms/IPO/PartialInlining.cpp
+++ lib/Transforms/IPO/PartialInlining.cpp
@@ -17,7 +17,9 @@
 #include "llvm/Analysis/BlockFrequencyInfo.h"
 #include "llvm/Analysis/BranchProbabilityInfo.h"
 #include "llvm/Analysis/LoopInfo.h"
+#include "llvm/Analysis/OptimizationDiagnosticInfo.h"
 #include "llvm/IR/CFG.h"
+#include "llvm/IR/DiagnosticInfo.h"
 #include "llvm/IR/Dominators.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/Module.h"
@@ -27,7 +29,7 @@
 #include "llvm/Transforms/Utils/CodeExtractor.h"
 using namespace llvm;
 
-#define DEBUG_TYPE "partialinlining"
+#define DEBUG_TYPE "partial-inlining"
 
 STATISTIC(NumPartialInlined, "Number of functions partially inlined");
 
@@ -152,11 +154,25 @@
   // Inline the top-level if test into all callers.
   std::vector<User *> Users(DuplicateFunction->user_begin(),
                             DuplicateFunction->user_end());
-  for (User *User : Users)
+
+  for (User *User : Users) {
+    CallSite CS;
     if (CallInst *CI = dyn_cast<CallInst>(User))
-      InlineFunction(CI, IFI);
+      CS = CallSite(CI);
     else if (InvokeInst *II = dyn_cast<InvokeInst>(User))
-      InlineFunction(II, IFI);
+      CS = CallSite(II);
+    else
+      llvm_unreachable("All uses must be calls");
+
+    OptimizationRemarkEmitter ORE(CS.getCaller());
+    DebugLoc DLoc = CS.getInstruction()->getDebugLoc();
+    BasicBlock *Block = CS.getParent();
+    ORE.emit(OptimizationRemark(DEBUG_TYPE, "PartiallyInlined", DLoc, Block)
+             << ore::NV("Callee", F) << " partially inlined into "
+             << ore::NV("Caller", CS.getCaller()));
+
+    InlineFunction(CS, IFI);
+  }
 
   // Ditch the duplicate, since we're done with it, and rewrite all remaining
   // users (function pointers, etc.) back to the original function.
Index: test/Transforms/CodeExtractor/PartialInlineOptRemark.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineOptRemark.ll
+++ test/Transforms/CodeExtractor/PartialInlineOptRemark.ll
@@ -0,0 +1,65 @@
+; RUN: opt -S -partial-inliner -pass-remarks=partial-inlining  -disable-output < %s 2>&1 | FileCheck %s
+; RUN: opt -S -passes=partial-inliner  -pass-remarks=partial-inlining -disable-output < %s 2>&1 | FileCheck %s
+
+define i32 @bar(i32 %arg) local_unnamed_addr #0 !dbg !5 {
+bb:
+  %tmp = icmp slt i32 %arg, 0, !dbg !7
+  br i1 %tmp, label %bb1, label %bb2, !dbg !8
+
+bb1:                                              ; preds = %bb
+  tail call void (...) @foo() #0, !dbg !9
+  tail call void (...) @foo() #0, !dbg !10
+  tail call void (...) @foo() #0, !dbg !11
+  tail call void (...) @foo() #0, !dbg !12
+  tail call void (...) @foo() #0, !dbg !13
+  tail call void (...) @foo() #0, !dbg !14
+  tail call void (...) @foo() #0, !dbg !15
+  tail call void (...) @foo() #0, !dbg !16
+  tail call void (...) @foo() #0, !dbg !17
+  br label %bb2, !dbg !18
+
+bb2:                                              ; preds = %bb1, %bb
+  %tmp3 = phi i32 [ 0, %bb1 ], [ 1, %bb ]
+  ret i32 %tmp3, !dbg !19
+}
+
+; Function Attrs: nounwind
+declare void @foo(...) local_unnamed_addr #0
+
+; Function Attrs: nounwind
+define i32 @dummy_caller(i32 %arg) local_unnamed_addr #0 !dbg !20 {
+bb:
+; CHECK:remark{{.*}}bar partially inlined into dummy_caller
+  %tmp = tail call i32 @bar(i32 %arg), !dbg !21
+  ret i32 %tmp, !dbg !22
+}
+
+attributes #0 = { nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3}
+!llvm.ident = !{!4}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
+!1 = !DIFile(filename: "t.c", directory: "/tmp")
+!2 = !{}
+!3 = !{i32 2, !"Debug Info Version", i32 3}
+!4 = !{!"clang "}
+!5 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 3, type: !6, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
+!6 = !DISubroutineType(types: !2)
+!7 = !DILocation(line: 4, column: 14, scope: !5)
+!8 = !DILocation(line: 4, column: 6, scope: !5)
+!9 = !DILocation(line: 5, column: 5, scope: !5)
+!10 = !DILocation(line: 6, column: 5, scope: !5)
+!11 = !DILocation(line: 7, column: 5, scope: !5)
+!12 = !DILocation(line: 8, column: 5, scope: !5)
+!13 = !DILocation(line: 9, column: 5, scope: !5)
+!14 = !DILocation(line: 10, column: 5, scope: !5)
+!15 = !DILocation(line: 11, column: 5, scope: !5)
+!16 = !DILocation(line: 12, column: 5, scope: !5)
+!17 = !DILocation(line: 13, column: 5, scope: !5)
+!18 = !DILocation(line: 14, column: 5, scope: !5)
+!19 = !DILocation(line: 17, column: 1, scope: !5)
+!20 = distinct !DISubprogram(name: "dummy_caller", scope: !1, file: !1, line: 19, type: !6, isLocal: false, isDefinition: true, scopeLine: 19, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
+!21 = !DILocation(line: 21, column: 11, scope: !20)
+!22 = !DILocation(line: 21, column: 4, scope: !20)