3 files changed, 26 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp b/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp
index 0c79def8793..61149d9229b 100644
--- a/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp
@@ -53,7 +53,8 @@ void ARMException::beginFunction(const MachineFunction *MF) {
 
   if (MoveType == AsmPrinter::CFI_M_Debug) {
     if (!hasEmittedCFISections) {
-      Asm->OutStreamer->EmitCFISections(false, true);
+      if (Asm->needsOnlyDebugCFIMoves())
+        Asm->OutStreamer->EmitCFISections(false, true);
       hasEmittedCFISections = true;
     }
 
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 5f15ac1d503..9f6caa95a9e 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -108,7 +108,7 @@ static unsigned getGVAlignmentLog2(const GlobalValue *GV, const DataLayout &DL,
 AsmPrinter::AsmPrinter(TargetMachine &tm, std::unique_ptr<MCStreamer> Streamer)
     : MachineFunctionPass(ID), TM(tm), MAI(tm.getMCAsmInfo()),
       OutContext(Streamer->getContext()), OutStreamer(std::move(Streamer)),
-      LastMI(nullptr), LastFn(0), Counter(~0U) {
+      isCFIMoveForDebugging(false), LastMI(nullptr), LastFn(0), Counter(~0U) {
   DD = nullptr;
   MMI = nullptr;
   LI = nullptr;
@@ -264,6 +264,28 @@ bool AsmPrinter::doInitialization(Module &M) {
     }
   }
 
+  switch (MAI->getExceptionHandlingType()) {
+  case ExceptionHandling::SjLj:
+  case ExceptionHandling::DwarfCFI:
+  case ExceptionHandling::ARM:
+    isCFIMoveForDebugging = true;
+    if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI)
+      break;
+    for (auto &F: M.getFunctionList()) {
+      // If the module contains any function with unwind data,
+      // .eh_frame has to be emitted.
+      // Ignore functions that won't get emitted.
+      if (!F.isDeclarationForLinker() && F.needsUnwindTableEntry()) {
+        isCFIMoveForDebugging = false;
+        break;
+      }
+    }
+    break;
+  default:
+    isCFIMoveForDebugging = false;
+    break;
+  }
+
   EHStreamer *ES = nullptr;
   switch (MAI->getExceptionHandlingType()) {
   case ExceptionHandling::None:
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp
index ef30e279aed..e08306b001f 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp
@@ -137,7 +137,7 @@ void DwarfCFIException::beginFragment(const MachineBasicBlock *MBB,
     return;
 
   if (!hasEmittedCFISections) {
-    if (Asm->needsCFIMoves() == AsmPrinter::CFI_M_Debug)
+    if (Asm->needsOnlyDebugCFIMoves())
       Asm->OutStreamer->EmitCFISections(false, true);
     hasEmittedCFISections = true;
   }