diff --git a/llvm/include/llvm/MC/MCStreamer.h b/llvm/include/llvm/MC/MCStreamer.h
--- a/llvm/include/llvm/MC/MCStreamer.h
+++ b/llvm/include/llvm/MC/MCStreamer.h
@@ -1064,7 +1064,7 @@
   /// Streamer specific finalization.
   virtual void finishImpl();
   /// Finish emission of machine code.
-  void Finish();
+  void Finish(SMLoc Loc = SMLoc());
 
   virtual bool mayHaveInstructions(MCSection &Sec) const { return true; }
 };
diff --git a/llvm/lib/MC/MCParser/AsmParser.cpp b/llvm/lib/MC/MCParser/AsmParser.cpp
--- a/llvm/lib/MC/MCParser/AsmParser.cpp
+++ b/llvm/lib/MC/MCParser/AsmParser.cpp
@@ -994,7 +994,7 @@
   // Finalize the output stream if there are no errors and if the client wants
   // us to.
   if (!HadError && !NoFinalize)
-    Out.Finish();
+    Out.Finish(Lexer.getLoc());
 
   return HadError || getContext().hadError();
 }
diff --git a/llvm/lib/MC/MCParser/MasmParser.cpp b/llvm/lib/MC/MCParser/MasmParser.cpp
--- a/llvm/lib/MC/MCParser/MasmParser.cpp
+++ b/llvm/lib/MC/MCParser/MasmParser.cpp
@@ -1263,7 +1263,7 @@
   // Finalize the output stream if there are no errors and if the client wants
   // us to.
   if (!HadError && !NoFinalize)
-    Out.Finish();
+    Out.Finish(Lexer.getLoc());
 
   return HadError || getContext().hadError();
 }
diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp
--- a/llvm/lib/MC/MCStreamer.cpp
+++ b/llvm/lib/MC/MCStreamer.cpp
@@ -273,9 +273,9 @@
 
 MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
   if (!hasUnfinishedDwarfFrameInfo()) {
-    getContext().reportError(SMLoc(), "this directive must appear between "
-                                      ".cfi_startproc and .cfi_endproc "
-                                      "directives");
+    getContext().reportError(getStartTokLoc(),
+                             "this directive must appear between "
+                             ".cfi_startproc and .cfi_endproc directives");
     return nullptr;
   }
   return &DwarfFrameInfos.back();
@@ -967,10 +967,10 @@
 void MCStreamer::EmitWindowsUnwindTables() {
 }
 
-void MCStreamer::Finish() {
+void MCStreamer::Finish(SMLoc Loc) {
   if ((!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End) ||
       (!WinFrameInfos.empty() && !WinFrameInfos.back()->End)) {
-    getContext().reportError(SMLoc(), "Unfinished frame!");
+    getContext().reportError(Loc, "Unfinished frame!");
     return;
   }
 
diff --git a/llvm/test/MC/X86/cfi-open-within-another-crash.s b/llvm/test/MC/X86/cfi-open-within-another-crash.s
--- a/llvm/test/MC/X86/cfi-open-within-another-crash.s
+++ b/llvm/test/MC/X86/cfi-open-within-another-crash.s
@@ -12,7 +12,7 @@
 .globl proc_two
 proc_two:
  .cfi_startproc
- 
+# CHECK: [[@LINE-1]]:2: error: starting new .cfi frame before finishing the previous one
+
  .cfi_endproc
 
-# CHECK: error: starting new .cfi frame before finishing the previous one
diff --git a/llvm/test/MC/X86/cfi-scope-errors.s b/llvm/test/MC/X86/cfi-scope-errors.s
--- a/llvm/test/MC/X86/cfi-scope-errors.s
+++ b/llvm/test/MC/X86/cfi-scope-errors.s
@@ -3,17 +3,11 @@
 
 .text
 .cfi_def_cfa rsp, 8
-# CHECK: error: this directive must appear between .cfi_startproc and .cfi_endproc directives
+# CHECK: [[@LINE-1]]:1: error: this directive must appear between .cfi_startproc and .cfi_endproc directives
 
 .cfi_startproc
 nop
 
-# TODO(kristina): As Reid suggested, this now supports source locations as a side effect
-# of another patch aimed at fixing the crash that would occur here, however the other
-# ones do not unfortunately. Will address it in a further patch propogating SMLoc down to
-# other CFI directives at which point more LINE checks can be added to ensure proper source
-# location reporting.
-
 # This tests source location correctness as well as the error and it not crashing.
 # CHECK: [[@LINE+2]]:1: error: starting new .cfi frame before finishing the previous one
 .cfi_startproc
@@ -22,4 +16,4 @@
 .cfi_endproc
 
 .cfi_def_cfa rsp, 8
-# CHECK: error: this directive must appear between .cfi_startproc and .cfi_endproc directives
+# CHECK: [[@LINE-1]]:1: error: this directive must appear between .cfi_startproc and .cfi_endproc directives
diff --git a/llvm/test/MC/X86/cfi-scope-unclosed.s b/llvm/test/MC/X86/cfi-scope-unclosed.s
--- a/llvm/test/MC/X86/cfi-scope-unclosed.s
+++ b/llvm/test/MC/X86/cfi-scope-unclosed.s
@@ -2,9 +2,9 @@
 # RUN:   -o /dev/null 2>&1 | FileCheck %s
 
 ## Check we don't crash on unclosed frame scope.
-# CHECK: error: Unfinished frame!
 
 .text
 .globl foo
 foo:
  .cfi_startproc
+# CHECK: [[@LINE+1]]:1: error: Unfinished frame!