Index: llvm/trunk/docs/MIRLangRef.rst
===================================================================
--- llvm/trunk/docs/MIRLangRef.rst
+++ llvm/trunk/docs/MIRLangRef.rst
@@ -365,12 +365,17 @@
 Instruction Flags
 ^^^^^^^^^^^^^^^^^
 
-The flag ``frame-setup`` can be specified before the instruction's name:
+The flag ``frame-setup`` or ``frame-destroy`` can be specified before the
+instruction's name:
 
 .. code-block:: text
 
     %fp = frame-setup ADDXri %sp, 0, 0
 
+.. code-block:: text
+
+    %x21, %x20 = frame-destroy LDPXi %sp
+
 .. _registers:
 
 Registers
Index: llvm/trunk/lib/CodeGen/MIRParser/MILexer.h
===================================================================
--- llvm/trunk/lib/CodeGen/MIRParser/MILexer.h
+++ llvm/trunk/lib/CodeGen/MIRParser/MILexer.h
@@ -63,6 +63,7 @@
     kw_renamable,
     kw_tied_def,
     kw_frame_setup,
+    kw_frame_destroy,
     kw_debug_location,
     kw_cfi_same_value,
     kw_cfi_offset,
Index: llvm/trunk/lib/CodeGen/MIRParser/MILexer.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/MIRParser/MILexer.cpp
+++ llvm/trunk/lib/CodeGen/MIRParser/MILexer.cpp
@@ -211,6 +211,7 @@
       .Case("renamable", MIToken::kw_renamable)
       .Case("tied-def", MIToken::kw_tied_def)
       .Case("frame-setup", MIToken::kw_frame_setup)
+      .Case("frame-destroy", MIToken::kw_frame_destroy)
       .Case("debug-location", MIToken::kw_debug_location)
       .Case("same_value", MIToken::kw_cfi_same_value)
       .Case("offset", MIToken::kw_cfi_offset)
Index: llvm/trunk/lib/CodeGen/MIRParser/MIParser.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/MIRParser/MIParser.cpp
+++ llvm/trunk/lib/CodeGen/MIRParser/MIParser.cpp
@@ -925,6 +925,9 @@
   if (Token.is(MIToken::kw_frame_setup)) {
     Flags |= MachineInstr::FrameSetup;
     lex();
+  } else if (Token.is(MIToken::kw_frame_destroy)) {
+    Flags |= MachineInstr::FrameDestroy;
+    lex();
   }
   if (Token.isNot(MIToken::Identifier))
     return error("expected a machine instruction");
Index: llvm/trunk/lib/CodeGen/MIRPrinter.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/MIRPrinter.cpp
+++ llvm/trunk/lib/CodeGen/MIRPrinter.cpp
@@ -670,6 +670,9 @@
     OS << " = ";
   if (MI.getFlag(MachineInstr::FrameSetup))
     OS << "frame-setup ";
+  else if (MI.getFlag(MachineInstr::FrameDestroy))
+    OS << "frame-destroy ";
+
   OS << TII->getName(MI.getOpcode());
   if (I < E)
     OS << ' ';
Index: llvm/trunk/test/CodeGen/AArch64/arm64-csldst-mmo.ll
===================================================================
--- llvm/trunk/test/CodeGen/AArch64/arm64-csldst-mmo.ll
+++ llvm/trunk/test/CodeGen/AArch64/arm64-csldst-mmo.ll
@@ -11,7 +11,7 @@
 ; CHECK: Before post-MI-sched:
 ; CHECK-LABEL: # Machine code for function test1:
 ; CHECK: SU(2):   STRWui %wzr
-; CHECK: SU(3):   %x21, %x20 = LDPXi %sp
+; CHECK: SU(3):   %x21, %x20 = LDPXi %sp, 2; flags: FrameDestroy
 ; CHECK:  Predecessors:
 ; CHECK-NEXT:   SU(0): Out
 ; CHECK-NEXT:   SU(0): Out
Index: llvm/trunk/test/CodeGen/MIR/X86/frame-setup-instruction-flag.mir
===================================================================
--- llvm/trunk/test/CodeGen/MIR/X86/frame-setup-instruction-flag.mir
+++ llvm/trunk/test/CodeGen/MIR/X86/frame-setup-instruction-flag.mir
@@ -30,6 +30,7 @@
     ; CHECK: frame-setup PUSH64r %rax
     frame-setup PUSH64r %rax, implicit-def %rsp, implicit %rsp
     CALL64pcrel32 @compute, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, implicit-def %eax
-    %rdx = POP64r implicit-def %rsp, implicit %rsp
+    ; CHECK: %rdx = frame-destroy POP64r
+    %rdx = frame-destroy POP64r implicit-def %rsp, implicit %rsp
     RETQ %eax
 ...