diff --git a/llvm/include/llvm/MC/MCContext.h b/llvm/include/llvm/MC/MCContext.h
--- a/llvm/include/llvm/MC/MCContext.h
+++ b/llvm/include/llvm/MC/MCContext.h
@@ -173,7 +173,7 @@
   unsigned GetInstance(unsigned LocalLabelVal);
 
   /// LLVM_BB_ADDR_MAP version to emit.
-  uint8_t BBAddrMapVersion = 1;
+  uint8_t BBAddrMapVersion = 2;
 
   /// The file name of the log file from the environment variable
   /// AS_SECURE_LOG_FILE.  Which must be set before the .secure_log_unique
diff --git a/llvm/test/CodeGen/X86/basic-block-sections-labels-empty-function.ll b/llvm/test/CodeGen/X86/basic-block-sections-labels-empty-function.ll
--- a/llvm/test/CodeGen/X86/basic-block-sections-labels-empty-function.ll
+++ b/llvm/test/CodeGen/X86/basic-block-sections-labels-empty-function.ll
@@ -18,6 +18,6 @@
 ; CHECK:	func:
 ; CHECK:	.Lfunc_begin1:
 ; CHECK:		.section	.llvm_bb_addr_map,"o",@llvm_bb_addr_map,.text{{$}}
-; CHECK-NEXT:		.byte 1			# version
+; CHECK-NEXT:		.byte 2			# version
 ; CHECK-NEXT:		.byte 0			# feature
 ; CHECK-NEXT:		.quad	.Lfunc_begin1	# function address
diff --git a/llvm/test/CodeGen/X86/basic-block-sections-labels-functions-sections.ll b/llvm/test/CodeGen/X86/basic-block-sections-labels-functions-sections.ll
--- a/llvm/test/CodeGen/X86/basic-block-sections-labels-functions-sections.ll
+++ b/llvm/test/CodeGen/X86/basic-block-sections-labels-functions-sections.ll
@@ -10,7 +10,7 @@
 ; CHECK-LABEL:	_Z3barv:
 ; CHECK-NEXT:	[[BAR_BEGIN:.Lfunc_begin[0-9]+]]:
 ; CHECK:		.section .llvm_bb_addr_map,"o",@llvm_bb_addr_map,.text._Z3barv{{$}}
-; CHECK-NEXT:		.byte 1			# version
+; CHECK-NEXT:		.byte 2			# version
 ; CHECK-NEXT:		.byte 0			# feature
 ; CHECK-NEXT:		.quad [[BAR_BEGIN]]	# function address
 
@@ -23,7 +23,7 @@
 ; CHECK-LABEL:	_Z3foov:
 ; CHECK-NEXT:	[[FOO_BEGIN:.Lfunc_begin[0-9]+]]:
 ; CHECK:		.section  .llvm_bb_addr_map,"o",@llvm_bb_addr_map,.text._Z3foov{{$}}
-; CHECK-NEXT:		.byte 1			# version
+; CHECK-NEXT:		.byte 2			# version
 ; CHECK-NEXT:		.byte 0			# feature
 ; CHECK-NEXT:		.quad [[FOO_BEGIN]]	# function address
 
@@ -36,6 +36,6 @@
 ; CHECK-LABEL:	_Z4fooTIiET_v:
 ; CHECK-NEXT:	[[FOOCOMDAT_BEGIN:.Lfunc_begin[0-9]+]]:
 ; CHECK:		.section .llvm_bb_addr_map,"Go",@llvm_bb_addr_map,_Z4fooTIiET_v,comdat,.text._Z4fooTIiET_v{{$}}
-; CHECK-NEXT:		.byte 1				# version
+; CHECK-NEXT:		.byte 2				# version
 ; CHECK-NEXT:		.byte 0				# feature
 ; CHECK-NEXT:		.quad [[FOOCOMDAT_BEGIN]]	# function address
diff --git a/llvm/test/CodeGen/X86/basic-block-sections-labels.ll b/llvm/test/CodeGen/X86/basic-block-sections-labels.ll
--- a/llvm/test/CodeGen/X86/basic-block-sections-labels.ll
+++ b/llvm/test/CodeGen/X86/basic-block-sections-labels.ll
@@ -46,19 +46,23 @@
 ; UNIQ:			.section	.llvm_bb_addr_map,"o",@llvm_bb_addr_map,.text._Z3bazb{{$}}
 ;; Verify that with -unique-section-names=false, the unique id of the text section gets assigned to the llvm_bb_addr_map section.
 ; NOUNIQ:		.section	.llvm_bb_addr_map,"o",@llvm_bb_addr_map,.text,unique,1
-; CHECK-NEXT:   .byte   1		# version
+; CHECK-NEXT:   .byte   2		# version
 ; CHECK-NEXT:   .byte   0		# feature
 ; CHECK-NEXT:	.quad	.Lfunc_begin0	# function address
 ; CHECK-NEXT:	.byte	4		# number of basic blocks
+; CHECK-NEXT:   .byte	0		# BB id
 ; CHECK-NEXT:	.uleb128 .Lfunc_begin0-.Lfunc_begin0
 ; CHECK-NEXT:	.uleb128 .LBB_END0_0-.Lfunc_begin0
 ; CHECK-NEXT:	.byte	8
+; CHECK-NEXT:   .byte	1		# BB id
 ; CHECK-NEXT:	.uleb128 .LBB0_1-.LBB_END0_0
 ; CHECK-NEXT:	.uleb128 .LBB_END0_1-.LBB0_1
 ; CHECK-NEXT:	.byte	8
+; CHECK-NEXT:   .byte	3		# BB id
 ; CHECK-NEXT:	.uleb128 .LBB0_2-.LBB_END0_1
 ; CHECK-NEXT:	.uleb128 .LBB_END0_2-.LBB0_2
 ; CHECK-NEXT:	.byte	1
+; CHECK-NEXT:   .byte	2		# BB id
 ; CHECK-NEXT:	.uleb128 .LBB0_3-.LBB_END0_2
 ; CHECK-NEXT:	.uleb128 .LBB_END0_3-.LBB0_3
 ; CHECK-NEXT:	.byte	5