Index: include/llvm/Transforms/Utils/CodeExtractor.h
===================================================================
--- include/llvm/Transforms/Utils/CodeExtractor.h
+++ include/llvm/Transforms/Utils/CodeExtractor.h
@@ -64,6 +64,11 @@
     unsigned NumExitBlocks = std::numeric_limits<unsigned>::max();
     Type *RetTy;
 
+    // Suffix to use when creating extracted function (appended to the original
+    // function name + "."). If empty, the default is to use the entry block
+    // label, if non-empty, otherwise "extracted".
+    std::string Suffix;
+
   public:
     /// Create a code extractor for a sequence of blocks.
     ///
@@ -78,7 +83,8 @@
     CodeExtractor(ArrayRef<BasicBlock *> BBs, DominatorTree *DT = nullptr,
                   bool AggregateArgs = false, BlockFrequencyInfo *BFI = nullptr,
                   BranchProbabilityInfo *BPI = nullptr,
-                  bool AllowVarArgs = false, bool AllowAlloca = false);
+                  bool AllowVarArgs = false, bool AllowAlloca = false,
+                  std::string Suffix = "");
 
     /// Create a code extractor for a loop body.
     ///
@@ -86,7 +92,8 @@
     /// block sequence of the loop.
     CodeExtractor(DominatorTree &DT, Loop &L, bool AggregateArgs = false,
                   BlockFrequencyInfo *BFI = nullptr,
-                  BranchProbabilityInfo *BPI = nullptr);
+                  BranchProbabilityInfo *BPI = nullptr,
+                  std::string Suffix = "");
 
     /// Perform the extraction, returning the new function.
     ///
Index: lib/Transforms/IPO/HotColdSplitting.cpp
===================================================================
--- lib/Transforms/IPO/HotColdSplitting.cpp
+++ lib/Transforms/IPO/HotColdSplitting.cpp
@@ -265,7 +265,7 @@
                                     DominatorTree *DT, PostDomTree *PDT);
   Function *extractColdRegion(const SmallVectorImpl<BasicBlock *> &Region,
                               DominatorTree *DT, BlockFrequencyInfo *BFI,
-                              OptimizationRemarkEmitter &ORE);
+                              OptimizationRemarkEmitter &ORE, unsigned Count);
   bool isOutlineCandidate(const SmallVectorImpl<BasicBlock *> &Region,
                           const BasicBlock *Exit) const {
     if (!Exit)
@@ -331,16 +331,18 @@
   return true;
 }
 
-Function *
-HotColdSplitting::extractColdRegion(const SmallVectorImpl<BasicBlock *> &Region,
-                                    DominatorTree *DT, BlockFrequencyInfo *BFI,
-                                    OptimizationRemarkEmitter &ORE) {
+Function *HotColdSplitting::extractColdRegion(
+    const SmallVectorImpl<BasicBlock *> &Region, DominatorTree *DT,
+    BlockFrequencyInfo *BFI, OptimizationRemarkEmitter &ORE, unsigned Count) {
   assert(!Region.empty());
   LLVM_DEBUG(for (auto *BB : Region)
           llvm::dbgs() << "\nExtracting: " << *BB;);
 
   // TODO: Pass BFI and BPI to update profile information.
-  CodeExtractor CE(Region, DT);
+  CodeExtractor CE(Region, DT, /* AggregateArgs */ false, /* BFI */ nullptr,
+                   /* BPI */ nullptr, /* AllowVarArgs */ false,
+                   /* AllowAlloca */ false,
+                   /* Suffix */ "cold" + std::to_string(Count));
 
   SetVector<Value *> Inputs, Outputs, Sinks;
   CE.findInputsOutputs(Inputs, Outputs, Sinks);
@@ -419,7 +421,7 @@
         ++NumColdSESEFound;
         ValidColdRegion.push_back(ExitColdRegion);
         // Candidate for outlining. FIXME: Continue outlining.
-        return extractColdRegion(ValidColdRegion, DT, BFI, ORE);
+        return extractColdRegion(ValidColdRegion, DT, BFI, ORE, /* Count */ 1);
       }
     }
   }
Index: lib/Transforms/Utils/CodeExtractor.cpp
===================================================================
--- lib/Transforms/Utils/CodeExtractor.cpp
+++ lib/Transforms/Utils/CodeExtractor.cpp
@@ -228,19 +228,21 @@
 CodeExtractor::CodeExtractor(ArrayRef<BasicBlock *> BBs, DominatorTree *DT,
                              bool AggregateArgs, BlockFrequencyInfo *BFI,
                              BranchProbabilityInfo *BPI, bool AllowVarArgs,
-                             bool AllowAlloca)
+                             bool AllowAlloca, std::string Suffix)
     : DT(DT), AggregateArgs(AggregateArgs || AggregateArgsOpt), BFI(BFI),
       BPI(BPI), AllowVarArgs(AllowVarArgs),
-      Blocks(buildExtractionBlockSet(BBs, DT, AllowVarArgs, AllowAlloca)) {}
+      Blocks(buildExtractionBlockSet(BBs, DT, AllowVarArgs, AllowAlloca)),
+      Suffix(Suffix) {}
 
 CodeExtractor::CodeExtractor(DominatorTree &DT, Loop &L, bool AggregateArgs,
                              BlockFrequencyInfo *BFI,
-                             BranchProbabilityInfo *BPI)
+                             BranchProbabilityInfo *BPI, std::string Suffix)
     : DT(&DT), AggregateArgs(AggregateArgs || AggregateArgsOpt), BFI(BFI),
       BPI(BPI), AllowVarArgs(false),
       Blocks(buildExtractionBlockSet(L.getBlocks(), &DT,
                                      /* AllowVarArgs */ false,
-                                     /* AllowAlloca */ false)) {}
+                                     /* AllowAlloca */ false)),
+      Suffix(Suffix) {}
 
 /// definedInRegion - Return true if the specified value is defined in the
 /// extracted region.
@@ -669,10 +671,14 @@
                   FunctionType::get(RetTy, paramTy,
                                     AllowVarArgs && oldFunction->isVarArg());
 
+  std::string SuffixToUse =
+      Suffix.empty()
+          ? (header->getName().empty() ? "extracted" : header->getName().str())
+          : Suffix;
   // Create the new function
   Function *newFunction = Function::Create(
       funcType, GlobalValue::InternalLinkage, oldFunction->getAddressSpace(),
-      oldFunction->getName() + "_" + header->getName(), M);
+      oldFunction->getName() + "." + SuffixToUse, M);
   // If the old function is no-throw, so is the new one.
   if (oldFunction->doesNotThrow())
     newFunction->setDoesNotThrow();
Index: test/Transforms/BlockExtractor/extract-blocks.ll
===================================================================
--- test/Transforms/BlockExtractor/extract-blocks.ll
+++ test/Transforms/BlockExtractor/extract-blocks.ll
@@ -4,11 +4,11 @@
 ; RUN: opt -S -extract-blocks -extract-blocks-file=%t -extract-blocks-erase-funcs %s | FileCheck %s --check-prefix=CHECK-ERASE
 
 ; CHECK-NO-ERASE: @foo(
-; CHECK-NO-ERASE: @foo_bb9(
-; CHECK-NO-ERASE: @foo_bb20(
+; CHECK-NO-ERASE: @foo.bb9(
+; CHECK-NO-ERASE: @foo.bb20(
 ; CHECK-ERASE: declare i32 @foo(
-; CHECK-ERASE: @foo_bb9(
-; CHECK-ERASE: @foo_bb20(
+; CHECK-ERASE: @foo.bb9(
+; CHECK-ERASE: @foo.bb20(
 define i32 @foo(i32 %arg, i32 %arg1) {
 bb:
   %tmp5 = icmp sgt i32 %arg, 0
Index: test/Transforms/CodeExtractor/ExtractedFnEntryCount.ll
===================================================================
--- test/Transforms/CodeExtractor/ExtractedFnEntryCount.ll
+++ test/Transforms/CodeExtractor/ExtractedFnEntryCount.ll
@@ -22,7 +22,7 @@
   ret i32 %val
 }
 
-; CHECK: @inlinedFunc.1_if.then(i1 %cond) !prof [[COUNT1:![0-9]+]]
+; CHECK: @inlinedFunc.1.if.then(i1 %cond) !prof [[COUNT1:![0-9]+]]
 
 
 !llvm.module.flags = !{!0}
Index: test/Transforms/CodeExtractor/PartialInlineAnd.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineAnd.ll
+++ test/Transforms/CodeExtractor/PartialInlineAnd.ll
@@ -41,11 +41,11 @@
 ; CHECK-LABEL: @dummy_caller
 ; CHECK: br i1
 ; CHECK: br i1
-; CHECK: call void @bar.1_
+; CHECK: call void @bar.1.
 ; LIMIT-LABEL: @dummy_caller
 ; LIMIT: br i1
 ; LIMIT-NOT: br
-; LIMIT: call void @bar.1_
+; LIMIT: call void @bar.1.
   %tmp = tail call i32 @bar(i32 %arg)
   ret i32 %tmp
 }
Index: test/Transforms/CodeExtractor/PartialInlineAndOr.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineAndOr.ll
+++ test/Transforms/CodeExtractor/PartialInlineAndOr.ll
@@ -49,7 +49,7 @@
 ; CHECK: br i1
 ; CHECK: br i1
 ; CHECK: br i1
-; CHECK: call void @bar.1_
+; CHECK: call void @bar.1.
 ; LIMIT-LABEL: @dummy_caller
 ; LIMIT-NOT: br i1
 ; LIMIT: call i32 @bar
Index: test/Transforms/CodeExtractor/PartialInlineAttributes.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineAttributes.ll
+++ test/Transforms/CodeExtractor/PartialInlineAttributes.ll
@@ -55,9 +55,9 @@
   ret i32 %add
 }
 ; CHECK-LABEL: @caller
-; CHECK: call void @callee_most.2_if.then(i32 %v
+; CHECK: call void @callee_most.2.if.then(i32 %v
 ; CHECK: call i32 @callee_noinline(i32 %v)
-; CHECK: call void @callee_writeonly.1_if.then(i32 %v
+; CHECK: call void @callee_writeonly.1.if.then(i32 %v
 define i32 @caller(i32 %v) {
 entry:
   %c1 = call i32 @callee_most(i32 %v)
@@ -66,8 +66,8 @@
   ret i32 %c3
 }
 
-; CHECK: define internal void @callee_writeonly.1_if.then(i32 %v, i32* %sub.out) { 
-; CHECK: define internal void @callee_most.2_if.then(i32 %v, i32* %sub.out)  [[FN_ATTRS:#[0-9]+]]
+; CHECK: define internal void @callee_writeonly.1.if.then(i32 %v, i32* %sub.out) { 
+; CHECK: define internal void @callee_most.2.if.then(i32 %v, i32* %sub.out)  [[FN_ATTRS:#[0-9]+]]
 
 ; attributes to preserve
 attributes #0 = {
Index: test/Transforms/CodeExtractor/PartialInlineDebug.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineDebug.ll
+++ test/Transforms/CodeExtractor/PartialInlineDebug.ll
@@ -23,7 +23,7 @@
 
 ; CHECK-LABEL: @caller
 ; CHECK: codeRepl.i:
-; CHECK-NEXT: call void @callee.2_if.then(i32 %v, i32* %mul.loc.i), !dbg ![[DBG2:[0-9]+]]
+; CHECK-NEXT: call void @callee.2.if.then(i32 %v, i32* %mul.loc.i), !dbg ![[DBG2:[0-9]+]]
 define i32 @caller(i32 %v) !dbg !8 {
 entry:
   %call = call i32 @callee(i32 %v), !dbg !14
@@ -53,17 +53,17 @@
 
 ; CHECK-LABEL: @caller2
 ; CHECK: codeRepl.i:
-; CHECK-NEXT: call void @callee2.1_if.then(i32 %v, i32* %sub.loc.i), !dbg ![[DBG4:[0-9]+]]
+; CHECK-NEXT: call void @callee2.1.if.then(i32 %v, i32* %sub.loc.i), !dbg ![[DBG4:[0-9]+]]
 define i32 @caller2(i32 %v) !dbg !21 {
 entry:
   %call = call i32 @callee2(i32 %v), !dbg !22
   ret i32 %call
 }
 
-; CHECK-LABEL: define internal void @callee2.1_if.then
+; CHECK-LABEL: define internal void @callee2.1.if.then
 ; CHECK: br label %if.then, !dbg ![[DBG5:[0-9]+]]
 
-; CHECK-LABEL: define internal void @callee.2_if.then
+; CHECK-LABEL: define internal void @callee.2.if.then
 ; CHECK: br label %if.then, !dbg ![[DBG6:[0-9]+]]
 
 ; CHECK: ![[DBG1]] = !DILocation(line: 10, column: 7,
Index: test/Transforms/CodeExtractor/PartialInlineEntryUpdate.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineEntryUpdate.ll
+++ test/Transforms/CodeExtractor/PartialInlineEntryUpdate.ll
@@ -17,9 +17,9 @@
 entry:
 ; CHECK-LABEL: @Caller1
 ; CHECK: br
-; CHECK: call void @Func.1_ 
+; CHECK: call void @Func.1.
 ; CHECK: br
-; CHECK: call void @Func.1_ 
+; CHECK: call void @Func.1.
   %val = call i32 @Func(i1 %cond, i32* %align.val)
   %val2 = call i32 @Func(i1 %cond, i32* %align.val)
   ret i32 %val
@@ -29,7 +29,7 @@
 entry:
 ; CHECK-LABEL: @Caller2
 ; CHECK: br
-; CHECK: call void @Func.1_ 
+; CHECK: call void @Func.1.
   %val = call i32 @Func(i1 %cond, i32* %align.val)
   ret i32 %val
 }
Index: test/Transforms/CodeExtractor/PartialInlineInvokeProducesOutVal.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineInvokeProducesOutVal.ll
+++ test/Transforms/CodeExtractor/PartialInlineInvokeProducesOutVal.ll
@@ -26,14 +26,14 @@
 ; CHECK-LABEL: bb:
 ; CHECK-NEXT:  [[CALL26LOC:%.*]] = alloca i8*
 ; CHECK-LABEL: codeRepl.i:
-; CHECK-NEXT:   call void @bar.1_bb1(i8** [[CALL26LOC]])
+; CHECK-NEXT:   call void @bar.1.bb1(i8** [[CALL26LOC]])
 define i8* @dummy_caller(i32 %arg) {
 bb:
   %tmp = tail call i8* @bar(i32 %arg)
   ret i8* %tmp
 }
 
-; CHECK-LABEL: define internal void @bar.1_bb1
+; CHECK-LABEL: define internal void @bar.1.bb1
 ; CHECK-LABEL: bb1:
 ; CHECK-NEXT:    %call26 = invoke i8* @invoke_callee()
 ; CHECK-NEXT:            to label %cont unwind label %lpad
Index: test/Transforms/CodeExtractor/PartialInlineLiveAcross.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineLiveAcross.ll
+++ test/Transforms/CodeExtractor/PartialInlineLiveAcross.ll
@@ -36,7 +36,7 @@
 define i32 @dummy_caller(i32 %arg) local_unnamed_addr #0 {
 ; CHECK-LABEL: @dummy_caller
 ; CHECK: codeRepl.i:
-; CHECK:  call void @test.1_bb2()
+; CHECK:  call void @test.1.bb2()
 ; CHECK-NOT: load
 ; CHECK  br
 
@@ -45,7 +45,7 @@
   ret i32 %tmp
 }
 
-; CHECK-LABEL: define internal void @test.1_bb2()
+; CHECK-LABEL: define internal void @test.1.bb2()
 ; CHECK: .exitStub:
 ; CHECK-NOT:  store i32 %tmp7, i32* %tmp7.out
 ; CHECK: ret
Index: test/Transforms/CodeExtractor/PartialInlineNoLiveOut.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineNoLiveOut.ll
+++ test/Transforms/CodeExtractor/PartialInlineNoLiveOut.ll
@@ -39,7 +39,7 @@
 define i32 @dummy_caller(i32 %arg) local_unnamed_addr #0 {
 ; CHECK-LABEL: @dummy_caller
 ; CHECK: codeRepl.i:
-; CHECK:  call void @test.1_bb2()
+; CHECK:  call void @test.1.bb2()
 ; CHECK-NOT: load
 ; CHECK  br
 bb:
@@ -47,7 +47,7 @@
   ret i32 %tmp
 }
 
-; CHECK-LABEL: define internal void @test.1_bb2()
+; CHECK-LABEL: define internal void @test.1.bb2()
 ; CHECK: .exitStub:
 ; CHECK-NOT:  store i32 %tmp7, i32* %tmp7.out
 ; CHECK: ret
Index: test/Transforms/CodeExtractor/PartialInlineOr.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineOr.ll
+++ test/Transforms/CodeExtractor/PartialInlineOr.ll
@@ -41,7 +41,7 @@
 ; CHECK-LABEL: @dummy_caller
 ; CHECK: br i1
 ; CHECK: br i1
-; CHECK: call void @bar.2_
+; CHECK: call void @bar.2.
 ; LIMIT-LABEL: @dummy_caller
 ; LIMIT-NOT: br
 ; LIMIT: call i32 @bar(
@@ -84,7 +84,7 @@
 define i32 @dummy_caller2(i32 %arg) local_unnamed_addr #0 {
 ; CHECK: br i1
 ; CHECK: br i1
-; CHECK: call {{.*}} @bar_multi_ret.1_
+; CHECK: call {{.*}} @bar_multi_ret.1.
   %tmp = tail call i32 @bar_multi_ret(i32 %arg)
   ret i32 %tmp
 }
Index: test/Transforms/CodeExtractor/PartialInlineOrAnd.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineOrAnd.ll
+++ test/Transforms/CodeExtractor/PartialInlineOrAnd.ll
@@ -52,12 +52,12 @@
 ; CHECK: br i1
 ; CHECK: br i1
 ; CHECK: br i1
-; CHECK: call void @bar.1_
+; CHECK: call void @bar.1.
 ; LIMIT3-LABEL: @dummy_caller
 ; LIMIT3: br i1
 ; LIMIT3: br i1
 ; LIMIT3-NOT: br i1
-; LIMIT3: call void @bar.1_
+; LIMIT3: call void @bar.1.
 ; LIMIT2-LABEL: @dummy_caller
 ; LIMIT2-NOT: br i1
 ; LIMIT2: call i32 @bar(
Index: test/Transforms/CodeExtractor/PartialInlinePGOMultiRegion.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlinePGOMultiRegion.ll
+++ test/Transforms/CodeExtractor/PartialInlinePGOMultiRegion.ll
@@ -109,9 +109,9 @@
 ; CHECK-LABEL: @foo
 ; CHECK-NOT: call signext i32 @bar
 ; CHECK: codeRepl1.i:
-; CHECK: call void @bar.1_if.then
+; CHECK: call void @bar.1.if.then
 ; CHECK: codeRepl.i:
-; CHECK: call void @bar.1_if.then2
+; CHECK: call void @bar.1.if.then2
 entry:
   %value.addr = alloca i32, align 4
   %ub.addr = alloca i32, align 4
@@ -123,11 +123,11 @@
   ret i32 %call
 }
 
-; CHECK-LABEL: define internal void @bar.1_if.then2
+; CHECK-LABEL: define internal void @bar.1.if.then2
 ; CHECK: .exitStub:
 ; CHECK: ret void
 
-; CHECK-LABEL: define internal void @bar.1_if.then
+; CHECK-LABEL: define internal void @bar.1.if.then
 ; CHECK: .exitStub:
 ; CHECK: ret void
 
Index: test/Transforms/CodeExtractor/PartialInlinePGORegion.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlinePGORegion.ll
+++ test/Transforms/CodeExtractor/PartialInlinePGORegion.ll
@@ -66,7 +66,7 @@
 ; CHECK-LABEL: @foo
 ; CHECK: codeRepl.i:
 ; CHECK-NOT: call signext i32 @bar
-; CHECK: call void @bar.1_if.then
+; CHECK: call void @bar.1.if.then
 entry:
   %value.addr = alloca i32, align 4
   %ub.addr = alloca i32, align 4
@@ -78,7 +78,7 @@
   ret i32 %call
 }
 
-; CHECK-LABEL: define internal void @bar.1_if.then
+; CHECK-LABEL: define internal void @bar.1.if.then
 ; CHECK: .exitStub:
 ; CHECK: ret void
 
Index: test/Transforms/CodeExtractor/PartialInlineVarArg.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineVarArg.ll
+++ test/Transforms/CodeExtractor/PartialInlineVarArg.ll
@@ -36,7 +36,7 @@
 }
 ; CHECK-LABEL: @caller1
 ; CHECK: codeRepl.i:
-; CHECK-NEXT:  call void (i32, i8**, i32, ...) @vararg.3_bb1(i32 %stat1.i, i8** %vargs.i, i32 %arg)
+; CHECK-NEXT:  call void (i32, i8**, i32, ...) @vararg.3.bb1(i32 %stat1.i, i8** %vargs.i, i32 %arg)
 
 define i32 @caller2(i32 %arg, float %arg2) {
 bb:
@@ -46,7 +46,7 @@
 
 ; CHECK-LABEL: @caller2
 ; CHECK: codeRepl.i:
-; CHECK-NEXT:  call void (i32, i8**, i32, ...) @vararg.3_bb1(i32 %stat1.i, i8** %vargs.i, i32 %arg, i32 10, float %arg2)
+; CHECK-NEXT:  call void (i32, i8**, i32, ...) @vararg.3.bb1(i32 %stat1.i, i8** %vargs.i, i32 %arg, i32 10, float %arg2)
 
 ; Test case to check that we do not extract a vararg function, if va_end is in
 ; a block that is not outlined.
@@ -104,4 +104,4 @@
 
 ; CHECK-LABEL: @caller_with_signext
 ; CHECK: codeRepl.i:
-; CHECK-NEXT:  call void (i32*, ...) @vararg2.1_cond.end(i32* %foo, i32 signext 8)
+; CHECK-NEXT:  call void (i32*, ...) @vararg2.1.cond.end(i32* %foo, i32 signext 8)
Index: test/Transforms/CodeExtractor/PartialInlineVarArgsDebug.ll
===================================================================
--- test/Transforms/CodeExtractor/PartialInlineVarArgsDebug.ll
+++ test/Transforms/CodeExtractor/PartialInlineVarArgsDebug.ll
@@ -19,14 +19,14 @@
 
 ; CHECK-LABEL: @caller
 ; CHECK: codeRepl.i:
-; CHECK-NEXT: call void (i32, i32*, ...) @callee.1_if.then(i32 %v, i32* %mul.loc.i, i32 99), !dbg ![[DBG2:[0-9]+]]
+; CHECK-NEXT: call void (i32, i32*, ...) @callee.1.if.then(i32 %v, i32* %mul.loc.i, i32 99), !dbg ![[DBG2:[0-9]+]]
 define i32 @caller(i32 %v) !dbg !8 {
 entry:
   %call = call i32 (i32, ...) @callee(i32 %v, i32 99), !dbg !14
   ret i32 %call, !dbg !15
 }
 
-; CHECK-LABEL: define internal void @callee.1_if.then
+; CHECK-LABEL: define internal void @callee.1.if.then
 ; CHECK: br label %if.then, !dbg ![[DBG3:[0-9]+]]
 
 ; CHECK: ![[DBG1]] = !DILocation(line: 10, column: 7,
Index: test/Transforms/CodeExtractor/SingleCondition.ll
===================================================================
--- test/Transforms/CodeExtractor/SingleCondition.ll
+++ test/Transforms/CodeExtractor/SingleCondition.ll
@@ -16,7 +16,7 @@
 entry:
 ; CHECK-LABEL: @dummyCaller
 ; CHECK: br
-; CHECK: call void @inlinedFunc.1_ 
+; CHECK: call void @inlinedFunc.1.
   %val = call i32 @inlinedFunc(i1 %cond, i32* %align.val)
   ret i32 %val
 }
Index: test/Transforms/CodeExtractor/X86/InheritTargetAttributes.ll
===================================================================
--- test/Transforms/CodeExtractor/X86/InheritTargetAttributes.ll
+++ test/Transforms/CodeExtractor/X86/InheritTargetAttributes.ll
@@ -36,5 +36,5 @@
 attributes #0 = { nounwind readnone }
 attributes #1 = { nounwind uwtable "target-cpu"="x86-64" "target-features"="+sse4.1" }
 
-; CHECK: define {{.*}} @inlinedFunc.1_if.then{{.*}} [[COUNT1:#[0-9]+]]
+; CHECK: define {{.*}} @inlinedFunc.1.if.then{{.*}} [[COUNT1:#[0-9]+]]
 ; CHECK: [[COUNT1]] = { {{.*}} "target-cpu"="x86-64" "target-features"="+sse4.1" }
Index: test/Transforms/CodeExtractor/cost.ll
===================================================================
--- test/Transforms/CodeExtractor/cost.ll
+++ test/Transforms/CodeExtractor/cost.ll
@@ -47,14 +47,14 @@
 define i32 @dummy_caller(i32* %arg) local_unnamed_addr {
 ; CHECK-LABEL: @dummy_caller
   %tmp = call i32 @outline_region_notlikely(i32* %arg)
-; CHECK:  call void @outline_region_notlikely.2_bb1
+; CHECK:  call void @outline_region_notlikely.2.bb1
   %tmp2 = tail call i32 @outline_region_likely(i32* %arg)
 ; CHECK: %tmp2 = tail call i32 @outline_region_likely(i32* %arg)
   ret i32 %tmp
 
 }
 
-; CHECK-LABEL: define internal void @outline_region_notlikely.2_bb1(i32* %arg) {
+; CHECK-LABEL: define internal void @outline_region_notlikely.2.bb1(i32* %arg) {
 ; CHECK-NEXT: newFuncRoot:
 
 !llvm.module.flags = !{!0}
Index: test/Transforms/CodeExtractor/cost_meta.ll
===================================================================
--- test/Transforms/CodeExtractor/cost_meta.ll
+++ test/Transforms/CodeExtractor/cost_meta.ll
@@ -28,7 +28,7 @@
  }
 
 
-; CHECK-LABEL: define internal void @outline_region_notlikely.1_bb1(i32* %arg) {
+; CHECK-LABEL: define internal void @outline_region_notlikely.1.bb1(i32* %arg) {
 ; CHECK-NEXT: newFuncRoot:
 
 declare i32 @foo(i32 * %arg)
Index: test/Transforms/CodeExtractor/inline_eh.ll
===================================================================
--- test/Transforms/CodeExtractor/inline_eh.ll
+++ test/Transforms/CodeExtractor/inline_eh.ll
@@ -42,11 +42,11 @@
 ; CHECK: entry:
 ; CHECK-NEXT: br i1
 ; CHECK: codeRepl.i:
-; CHECK-NEXT: call void @callee.1_{{.*}}()
+; CHECK-NEXT: call void @callee.1.{{.*}}()
   call void @callee(i1 %cond)
   ret void
 }
 
-; CHECK-LABEL: define {{.*}} @callee.1_{{.*}}() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+; CHECK-LABEL: define {{.*}} @callee.1.{{.*}}() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
 ; CHECK: invoke void @bar()
 ; CHECK: landingpad
Index: test/Transforms/CodeExtractor/inline_eh_1.ll
===================================================================
--- test/Transforms/CodeExtractor/inline_eh_1.ll
+++ test/Transforms/CodeExtractor/inline_eh_1.ll
@@ -42,12 +42,12 @@
 ; CHECK: entry:
 ; CHECK-NEXT: br i1
 ; CHECK: codeRepl.i:
-; CHECK-NEXT: call void @callee.1_{{.*}}()
+; CHECK-NEXT: call void @callee.1.{{.*}}()
   call void @callee(i1 %cond)
   ret void
 }
 
-; CHECK-LABEL: define {{.*}} @callee.1_{{.*}}() personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
+; CHECK-LABEL: define {{.*}} @callee.1.{{.*}}() personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
 ; CHECK: invoke void @bar()
 ; CHECK: cleanuppad
 ; CHECK-NEXT: cleanupret
Index: test/Transforms/CodeExtractor/live_shrink.ll
===================================================================
--- test/Transforms/CodeExtractor/live_shrink.ll
+++ test/Transforms/CodeExtractor/live_shrink.ll
@@ -41,13 +41,13 @@
 ; CHECK-NOT: llvm.lifetime
 ; CHECK: br i1
 ; CHECK: codeRepl.i:
-; CHECK: call void @_Z3foov.1_
+; CHECK: call void @_Z3foov.1.
 
   tail call void @_Z3foov()
   ret void
 }
 
-; CHECK-LABEL: define internal void @_Z3foov.1_
+; CHECK-LABEL: define internal void @_Z3foov.1.
 ; CHECK: newFuncRoot:
 ; CHECK-NEXT:  %tmp = alloca %class.A
 ; CHECK-NEXT:  %tmp1 = bitcast %class.A* %tmp to i8*
Index: test/Transforms/CodeExtractor/live_shrink_gep.ll
===================================================================
--- test/Transforms/CodeExtractor/live_shrink_gep.ll
+++ test/Transforms/CodeExtractor/live_shrink_gep.ll
@@ -42,12 +42,12 @@
 ; CHECK-NOT: llvm.lifetime
 ; CHECK: br i1
 ; CHECK: codeRepl.i:
-; CHECK: call void @_Z3foov.1_
+; CHECK: call void @_Z3foov.1.
   tail call void @_Z3foov()
   ret void
 }
 
-; CHECK-LABEL: define internal void @_Z3foov.1_
+; CHECK-LABEL: define internal void @_Z3foov.1.
 ; CHECK: newFuncRoot:
 ; CHECK-NEXT:  %tmp = alloca %class.A
 ; CHECK-NEXT:  %tmp1 = getelementptr
Index: test/Transforms/CodeExtractor/live_shrink_hoist.ll
===================================================================
--- test/Transforms/CodeExtractor/live_shrink_hoist.ll
+++ test/Transforms/CodeExtractor/live_shrink_hoist.ll
@@ -50,7 +50,7 @@
   ret void
 }
 
-; CHECK-LABEL: define internal void @_Z3foov.1_
+; CHECK-LABEL: define internal void @_Z3foov.1.
 ; CHECK: bb9:
 ; CHECK: call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %tmp1)
 ; CHECK:  br label %.exitStub
Index: test/Transforms/CodeExtractor/live_shrink_multiple.ll
===================================================================
--- test/Transforms/CodeExtractor/live_shrink_multiple.ll
+++ test/Transforms/CodeExtractor/live_shrink_multiple.ll
@@ -42,7 +42,7 @@
   ret void
 }
 
-; CHECK-LABEL: define internal void @_Z3foov.1_
+; CHECK-LABEL: define internal void @_Z3foov.1.
 ; CHECK: newFuncRoot:
 ; CHECK-NEXT:  alloca 
 ; CHECK-NEXT:  bitcast 
Index: test/Transforms/CodeExtractor/unreachable-block.ll
===================================================================
--- test/Transforms/CodeExtractor/unreachable-block.ll
+++ test/Transforms/CodeExtractor/unreachable-block.ll
@@ -1,12 +1,12 @@
 ; RUN: opt -S -partial-inliner %s | FileCheck %s
 
 ; CHECK-LABEL: define void @dipsy(
-; CHECK-NEXT:   call void @tinkywinky.1_ontrue()
+; CHECK-NEXT:   call void @tinkywinky.1.ontrue()
 ; CHECK-NEXT:   call void @patatuccio()
 ; CHECK-NEXT:   ret void
 ; CHECK-NEXT: }
 
-; CHECK-LABEL: define internal void @tinkywinky.1_ontrue() {
+; CHECK-LABEL: define internal void @tinkywinky.1.ontrue() {
 ; CHECK-NEXT: newFuncRoot:
 ; CHECK-NEXT:   br label %ontrue
 ; CHECK: onfalse{{.*}}:
Index: test/Transforms/HotColdSplit/split-cold-2.ll
===================================================================
--- test/Transforms/HotColdSplit/split-cold-2.ll
+++ test/Transforms/HotColdSplit/split-cold-2.ll
@@ -4,10 +4,10 @@
 ; Make sure this compiles. This test used to fail with an invalid phi node: the
 ; two predecessors were outlined and the SSA representation was invalid.
 
-; CHECK: remark: <unknown>:0:0: fun split cold code into fun_if.else
+; CHECK: remark: <unknown>:0:0: fun split cold code into fun.cold
 ; CHECK-LABEL: @fun
 ; CHECK: codeRepl:
-; CHECK-NEXT: call void @fun_if.else
+; CHECK-NEXT: call void @fun.cold
 
 define void @fun() {
 entry:
Index: test/Transforms/HotColdSplit/split-out-dbg-val-of-arg.ll
===================================================================
--- test/Transforms/HotColdSplit/split-out-dbg-val-of-arg.ll
+++ test/Transforms/HotColdSplit/split-out-dbg-val-of-arg.ll
@@ -1,6 +1,6 @@
 ; RUN: opt -hotcoldsplit -S < %s | FileCheck %s
 
-; CHECK-LABEL: define {{.*}}@foo_if.end
+; CHECK-LABEL: define {{.*}}@foo.cold
 ; CHECK-NOT: llvm.dbg.value
 
 define void @foo(i32 %arg1) !dbg !6 {
Index: test/tools/llvm-extract/extract-block.ll
===================================================================
--- test/tools/llvm-extract/extract-block.ll
+++ test/tools/llvm-extract/extract-block.ll
@@ -12,7 +12,7 @@
   ret void
 }
 
-; CHECK: @foo_bb4
+; CHECK: @foo.bb4
 ; CHECK: call void @bar()
 ; CHECK: %tmp5
 define i32 @foo(i32 %arg) {
Index: test/tools/llvm-extract/extract-multiple-blocks.ll
===================================================================
--- test/tools/llvm-extract/extract-multiple-blocks.ll
+++ test/tools/llvm-extract/extract-multiple-blocks.ll
@@ -1,7 +1,7 @@
 ; RUN: llvm-extract -S -bb foo:bb4 -bb foo:bb7 %s | FileCheck %s
 
-; CHECK: @foo_bb4
-; CHECK: @foo_bb7
+; CHECK: @foo.bb4
+; CHECK: @foo.bb7
 define i32 @foo(i32 %arg) {
 bb:
   %tmp = alloca i32, align 4