3 files changed, 9 insertions, 1 deletions
diff --git a/llvm/include/llvm/MC/MCAsmInfo.h b/llvm/include/llvm/MC/MCAsmInfo.h
index 775d22bea42..15b6aa13421 100644
--- a/llvm/include/llvm/MC/MCAsmInfo.h
+++ b/llvm/include/llvm/MC/MCAsmInfo.h
@@ -284,6 +284,10 @@ namespace llvm {
     // use EmitLabelOffsetDifference.
     bool DwarfUsesLabelOffsetForRanges;
 
+    /// DwarfRegNumForCFI - True if dwarf register numbers are printed
+    /// instead of symbolic register names in .cfi_* directives.
+    bool DwarfRegNumForCFI;  // Defaults to false;
+
     //===--- CBE Asm Translation Table -----------------------------------===//
 
     const char *const *AsmTransCBE;          // Defaults to empty
@@ -475,6 +479,9 @@ namespace llvm {
     bool doesDwarfUsesLabelOffsetForRanges() const {
       return DwarfUsesLabelOffsetForRanges;
     }
+    bool useDwarfRegNumForCFI() const {
+      return DwarfRegNumForCFI;
+    }
     const char *const *getAsmCBE() const {
       return AsmTransCBE;
     }
diff --git a/llvm/lib/MC/MCAsmInfo.cpp b/llvm/lib/MC/MCAsmInfo.cpp
index 73b259eaa0f..b8ce24b78f4 100644
--- a/llvm/lib/MC/MCAsmInfo.cpp
+++ b/llvm/lib/MC/MCAsmInfo.cpp
@@ -78,6 +78,7 @@ MCAsmInfo::MCAsmInfo() {
   DwarfRequiresRelocationForSectionOffset = true;
   DwarfSectionOffsetDirective = 0;
   DwarfUsesLabelOffsetForRanges = true;
+  DwarfRegNumForCFI = false;
   HasMicrosoftFastStdCallMangling = false;
 
   AsmTransCBE = 0;
diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
index acf77558c33..4ea1c9fb842 100644
--- a/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/llvm/lib/MC/MCAsmStreamer.cpp
@@ -825,7 +825,7 @@ void MCAsmStreamer::EmitCFIEndProc() {
 }
 
 void MCAsmStreamer::EmitRegisterName(int64_t Register) {
-  if (InstPrinter) {
+  if (InstPrinter && !MAI.useDwarfRegNumForCFI()) {
     const TargetAsmInfo &asmInfo = getContext().getTargetAsmInfo();
     unsigned LLVMRegister = asmInfo.getLLVMRegNum(Register, true);
     InstPrinter->printRegName(OS, LLVMRegister);