[BOLT][DWARF] Fix for Handle zero size DW_TAG_inlined_subroutine

Managed to introduce an error when changing code to fix other tests and the unit
test was no adequate due to --nostdlib being passed in in llvm testing
enviroment.
Original diff: https://reviews.llvm.org/D132059

Updated a test to make sure that original address and the new address are
different.

Reviewed By: maksfb, #bolt

Differential Revision: https://reviews.llvm.org/D132782

2 files changed, 226 insertions, 143 deletions

diff --git a/bolt/lib/Rewrite/DWARFRewriter.cpp b/bolt/lib/Rewrite/DWARFRewriter.cpp
index 39382a4..a76d128 100644
--- a/bolt/lib/Rewrite/DWARFRewriter.cpp
+++ b/bolt/lib/Rewrite/DWARFRewriter.cpp
@@ -463,28 +463,31 @@ void DWARFRewriter::updateUnitDebugInfo(
               ? BC.getBinaryFunctionContainingAddress(
                     RangesOrError->front().LowPC)
               : nullptr;
-      DebugAddressRangesVector OutputRanges;
       bool ErrorState = false;
+      std::optional<uint64_t> NewLowPC;
       if (Function) {
-        OutputRanges = Function->translateInputToOutputRanges(*RangesOrError);
+        DebugAddressRangesVector OutputRanges =
+            Function->translateInputToOutputRanges(*RangesOrError);
         LLVM_DEBUG(if (OutputRanges.empty() != RangesOrError->empty()) {
           dbgs() << "BOLT-DEBUG: problem with DIE at 0x"
                  << Twine::utohexstr(DIE.getOffset()) << " in CU at 0x"
                  << Twine::utohexstr(Unit.getOffset()) << '\n';
         });
-
+        if (!OutputRanges.empty())
+          NewLowPC = OutputRanges.front().LowPC;
         RangesSectionOffset = RangesSectionWriter.addRanges(
             std::move(OutputRanges), CachedRanges);
       } else if (!RangesOrError) {
         ErrorState = true;
         consumeError(RangesOrError.takeError());
       }
+
       uint64_t LowPCToUse = 0;
       if (!ErrorState && RangesOrError.get().size() == 1 &&
           RangesOrError.get().begin()->LowPC ==
               RangesOrError.get().begin()->HighPC) {
-        if (!OutputRanges.empty())
-          LowPCToUse = OutputRanges.front().LowPC;
+        if (NewLowPC)
+          LowPCToUse = NewLowPC.value();
         else
           LowPCToUse = RangesOrError.get().begin()->LowPC;
       }
diff --git a/bolt/test/X86/dwarf4-size-0-inlined_subroutine.s b/bolt/test/X86/dwarf4-size-0-inlined_subroutine.s
index 94721fe..8359452 100644
--- a/bolt/test/X86/dwarf4-size-0-inlined_subroutine.s
+++ b/bolt/test/X86/dwarf4-size-0-inlined_subroutine.s
@@ -1,94 +1,139 @@
 # REQUIRES: system-linux
 
 # RUN: llvm-mc -dwarf-version=4 -filetype=obj -triple x86_64-unknown-linux %s -o %tmain.o
-# RUN: %clang %cflags -dwarf-5 %tmain.o -o %t.exe -Wl,-q
-# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections
-# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt | FileCheck --check-prefix=CHECK %s
+# RUN: %clang %cflags -dwarf-4 %tmain.o -o %t.exe -Wl,-q
+# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections --use-old-text
+# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt > %t.txt
+# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.exe >> %t.txt
+# RUN: cat %t.txt | FileCheck --check-prefix=CHECK %s
 
-# CHECK: DW_TAG_inlined_subroutine
+# CHECK: 		DW_TAG_inlined_subroutine
 # CHECK: 		DW_AT_low_pc [DW_FORM_addr] (0x[[#%.16x,ADDR:]])
-# CHECK:	DW_AT_ranges [DW_FORM_sec_offset]
+# CHECK:		DW_AT_ranges [DW_FORM_sec_offset]
 # CHECK-NEXT:	[0x[[#ADDR]], 0x[[#ADDR]])
 
+# CHECK:		DW_TAG_inlined_subroutine
+# CHECK-NOT:	DW_AT_low_pc [DW_FORM_addr] (0x[[#ADDR]])
+
 
 # Testing BOLT handles correctly when size of DW_AT_inlined_subroutine is 0.
 # In other words DW_AT_high_pc is 0 or DW_AT_low_pc == DW_AT_high_pc.
 
 # Modified assembly manually to set DW_AT_high_pc to 0.
+# clang++ -g2 -gdwarf-4 main.cpp -O1 -S -o main4.s
+
 # static int helper(int i) {
 #   return ++i;
 # }
-#
+# void may_not_exist(void) __attribute__ ((weak));
 # int main(int argc, char *argv[]) {
-#   return helper(argc);
+#   if (may_not_exist)
+#     may_not_exist();
+#   int j = 0;
+#   [[clang::always_inline]] j = helper(argc);
+#   return j;
 # }
 
+
 	.text
 	.file	"main.cpp"
-	.globl	_Z6helperi                      # -- Begin function _Z6helperi
-	.p2align	4, 0x90
-	.type	_Z6helperi,@function
-_Z6helperi:                             # @_Z6helperi
-.Lfunc_begin0:
-	.file	1 "." "main.cpp"
-	.loc	1 1 0                           # main.cpp:1:0
-	.cfi_startproc
-# %bb.0:                                # %entry
-	#DEBUG_VALUE: helper:i <- $edi
-                                        # kill: def $edi killed $edi def $rdi
-	.loc	1 2 10 prologue_end             # main.cpp:2:10
-	leal	1(%rdi), %eax
-.Ltmp0:
-	#DEBUG_VALUE: helper:i <- $eax
-	.loc	1 2 3 is_stmt 0                 # main.cpp:2:3
-	retq
-.Ltmp1:
-.Lfunc_end0:
-	.size	_Z6helperi, .Lfunc_end0-_Z6helperi
-	.cfi_endproc
-                                        # -- End function
 	.globl	main                            # -- Begin function main
 	.p2align	4, 0x90
 	.type	main,@function
 main:                                   # @main
-.Lfunc_begin1:
-	.loc	1 5 0 is_stmt 1                 # main.cpp:5:0
+.Lfunc_begin0:
+	.file	1 "." "main.cpp"
+	.loc	1 5 0                           # main.cpp:5:0
 	.cfi_startproc
 # %bb.0:                                # %entry
 	#DEBUG_VALUE: main:argc <- $edi
 	#DEBUG_VALUE: main:argv <- $rsi
-	#DEBUG_VALUE: helper:i <- $edi
-                                        # kill: def $edi killed $edi def $rdi
-	.loc	1 2 10 prologue_end             # main.cpp:2:10
-	leal	1(%rdi), %eax
+	pushq	%rbx
+	.cfi_def_cfa_offset 16
+	.cfi_offset %rbx, -16
+	movl	%edi, %ebx
+.Ltmp0:
+	.loc	1 6 7 prologue_end              # main.cpp:6:7
+	cmpq	$0, _Z13may_not_existv@GOTPCREL(%rip)
+	je	.LBB0_2
+.Ltmp1:
+# %bb.1:                                # %if.then
+	#DEBUG_VALUE: main:argc <- $ebx
+	#DEBUG_VALUE: main:argv <- $rsi
+	.loc	1 7 5                           # main.cpp:7:5
+	callq	_Z13may_not_existv@PLT
 .Ltmp2:
+	#DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi
+.LBB0_2:                                # %if.end
+	#DEBUG_VALUE: main:argc <- $ebx
+	#DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi
+	#DEBUG_VALUE: main:j <- 0
+	#DEBUG_VALUE: helper:i <- $ebx
+	.loc	1 2 10                          # main.cpp:2:10
+	incl	%ebx
+.Ltmp3:
+	#DEBUG_VALUE: main:argc <- [DW_OP_LLVM_entry_value 1] $edi
+	#DEBUG_VALUE: helper:i <- $ebx
+	#DEBUG_VALUE: main:j <- $ebx
+	.loc	1 10 3                          # main.cpp:10:3
+	movl	%ebx, %eax
+	popq	%rbx
+.Ltmp4:
 	#DEBUG_VALUE: helper:i <- $eax
-	.loc	1 6 3                           # main.cpp:6:3
+	#DEBUG_VALUE: main:j <- $eax
+	.cfi_def_cfa_offset 8
 	retq
-.Ltmp3:
-.Lfunc_end1:
-	.size	main, .Lfunc_end1-main
+.Ltmp5:
+.Lfunc_end0:
+	.size	main, .Lfunc_end0-main
 	.cfi_endproc
                                         # -- End function
 	.section	.debug_loc,"",@progbits
 .Ldebug_loc0:
 	.quad	.Lfunc_begin0-.Lfunc_begin0
-	.quad	.Ltmp0-.Lfunc_begin0
+	.quad	.Ltmp1-.Lfunc_begin0
 	.short	1                               # Loc expr size
 	.byte	85                              # super-register DW_OP_reg5
-	.quad	.Ltmp0-.Lfunc_begin0
-	.quad	.Lfunc_end0-.Lfunc_begin0
+	.quad	.Ltmp1-.Lfunc_begin0
+	.quad	.Ltmp3-.Lfunc_begin0
 	.short	1                               # Loc expr size
-	.byte	80                              # super-register DW_OP_reg0
+	.byte	83                              # super-register DW_OP_reg3
+	.quad	.Ltmp3-.Lfunc_begin0
+	.quad	.Lfunc_end0-.Lfunc_begin0
+	.short	4                               # Loc expr size
+	.byte	243                             # DW_OP_GNU_entry_value
+	.byte	1                               # 1
+	.byte	85                              # super-register DW_OP_reg5
+	.byte	159                             # DW_OP_stack_value
 	.quad	0
 	.quad	0
 .Ldebug_loc1:
-	.quad	.Lfunc_begin1-.Lfunc_begin0
+	.quad	.Lfunc_begin0-.Lfunc_begin0
 	.quad	.Ltmp2-.Lfunc_begin0
 	.short	1                               # Loc expr size
-	.byte	85                              # super-register DW_OP_reg5
+	.byte	84                              # DW_OP_reg4
 	.quad	.Ltmp2-.Lfunc_begin0
-	.quad	.Lfunc_end1-.Lfunc_begin0
+	.quad	.Lfunc_end0-.Lfunc_begin0
+	.short	4                               # Loc expr size
+	.byte	243                             # DW_OP_GNU_entry_value
+	.byte	1                               # 1
+	.byte	84                              # DW_OP_reg4
+	.byte	159                             # DW_OP_stack_value
+	.quad	0
+	.quad	0
+.Ldebug_loc2:
+	.quad	.Ltmp2-.Lfunc_begin0
+	.quad	.Ltmp3-.Lfunc_begin0
+	.short	3                               # Loc expr size
+	.byte	17                              # DW_OP_consts
+	.byte	0                               # 0
+	.byte	159                             # DW_OP_stack_value
+	.quad	.Ltmp3-.Lfunc_begin0
+	.quad	.Ltmp4-.Lfunc_begin0
+	.short	1                               # Loc expr size
+	.byte	83                              # super-register DW_OP_reg3
+	.quad	.Ltmp4-.Lfunc_begin0
+	.quad	.Lfunc_end0-.Lfunc_begin0
 	.short	1                               # Loc expr size
 	.byte	80                              # super-register DW_OP_reg0
 	.quad	0
@@ -116,30 +161,6 @@ main:                                   # @main
 	.byte	2                               # Abbreviation Code
 	.byte	46                              # DW_TAG_subprogram
 	.byte	1                               # DW_CHILDREN_yes
-	.byte	17                              # DW_AT_low_pc
-	.byte	1                               # DW_FORM_addr
-	.byte	18                              # DW_AT_high_pc
-	.byte	6                               # DW_FORM_data4
-	.byte	64                              # DW_AT_frame_base
-	.byte	24                              # DW_FORM_exprloc
-	.ascii	"\227B"                         # DW_AT_GNU_all_call_sites
-	.byte	25                              # DW_FORM_flag_present
-	.byte	49                              # DW_AT_abstract_origin
-	.byte	19                              # DW_FORM_ref4
-	.byte	0                               # EOM(1)
-	.byte	0                               # EOM(2)
-	.byte	3                               # Abbreviation Code
-	.byte	5                               # DW_TAG_formal_parameter
-	.byte	0                               # DW_CHILDREN_no
-	.byte	2                               # DW_AT_location
-	.byte	23                              # DW_FORM_sec_offset
-	.byte	49                              # DW_AT_abstract_origin
-	.byte	19                              # DW_FORM_ref4
-	.byte	0                               # EOM(1)
-	.byte	0                               # EOM(2)
-	.byte	4                               # Abbreviation Code
-	.byte	46                              # DW_TAG_subprogram
-	.byte	1                               # DW_CHILDREN_yes
 	.byte	110                             # DW_AT_linkage_name
 	.byte	14                              # DW_FORM_strp
 	.byte	3                               # DW_AT_name
@@ -150,13 +171,11 @@ main:                                   # @main
 	.byte	11                              # DW_FORM_data1
 	.byte	73                              # DW_AT_type
 	.byte	19                              # DW_FORM_ref4
-	.byte	63                              # DW_AT_external
-	.byte	25                              # DW_FORM_flag_present
 	.byte	32                              # DW_AT_inline
 	.byte	11                              # DW_FORM_data1
 	.byte	0                               # EOM(1)
 	.byte	0                               # EOM(2)
-	.byte	5                               # Abbreviation Code
+	.byte	3                               # Abbreviation Code
 	.byte	5                               # DW_TAG_formal_parameter
 	.byte	0                               # DW_CHILDREN_no
 	.byte	3                               # DW_AT_name
@@ -169,7 +188,7 @@ main:                                   # @main
 	.byte	19                              # DW_FORM_ref4
 	.byte	0                               # EOM(1)
 	.byte	0                               # EOM(2)
-	.byte	6                               # Abbreviation Code
+	.byte	4                               # Abbreviation Code
 	.byte	36                              # DW_TAG_base_type
 	.byte	0                               # DW_CHILDREN_no
 	.byte	3                               # DW_AT_name
@@ -180,7 +199,7 @@ main:                                   # @main
 	.byte	11                              # DW_FORM_data1
 	.byte	0                               # EOM(1)
 	.byte	0                               # EOM(2)
-	.byte	7                               # Abbreviation Code
+	.byte	5                               # Abbreviation Code
 	.byte	46                              # DW_TAG_subprogram
 	.byte	1                               # DW_CHILDREN_yes
 	.byte	17                              # DW_AT_low_pc
@@ -203,11 +222,11 @@ main:                                   # @main
 	.byte	25                              # DW_FORM_flag_present
 	.byte	0                               # EOM(1)
 	.byte	0                               # EOM(2)
-	.byte	8                               # Abbreviation Code
+	.byte	6                               # Abbreviation Code
 	.byte	5                               # DW_TAG_formal_parameter
 	.byte	0                               # DW_CHILDREN_no
 	.byte	2                               # DW_AT_location
-	.byte	24                              # DW_FORM_exprloc
+	.byte	23                              # DW_FORM_sec_offset
 	.byte	3                               # DW_AT_name
 	.byte	14                              # DW_FORM_strp
 	.byte	58                              # DW_AT_decl_file
@@ -218,7 +237,22 @@ main:                                   # @main
 	.byte	19                              # DW_FORM_ref4
 	.byte	0                               # EOM(1)
 	.byte	0                               # EOM(2)
-	.byte	9                               # Abbreviation Code
+	.byte	7                               # Abbreviation Code
+	.byte	52                              # DW_TAG_variable
+	.byte	0                               # DW_CHILDREN_no
+	.byte	2                               # DW_AT_location
+	.byte	23                              # DW_FORM_sec_offset
+	.byte	3                               # DW_AT_name
+	.byte	14                              # DW_FORM_strp
+	.byte	58                              # DW_AT_decl_file
+	.byte	11                              # DW_FORM_data1
+	.byte	59                              # DW_AT_decl_line
+	.byte	11                              # DW_FORM_data1
+	.byte	73                              # DW_AT_type
+	.byte	19                              # DW_FORM_ref4
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	8                               # Abbreviation Code
 	.byte	29                              # DW_TAG_inlined_subroutine
 	.byte	1                               # DW_CHILDREN_yes
 	.byte	49                              # DW_AT_abstract_origin
@@ -235,7 +269,42 @@ main:                                   # @main
 	.byte	11                              # DW_FORM_data1
 	.byte	0                               # EOM(1)
 	.byte	0                               # EOM(2)
+	.byte	9                               # Abbreviation Code
+	.byte	5                               # DW_TAG_formal_parameter
+	.byte	0                               # DW_CHILDREN_no
+	.byte	2                               # DW_AT_location
+	.byte	24                              # DW_FORM_exprloc
+	.byte	49                              # DW_AT_abstract_origin
+	.byte	19                              # DW_FORM_ref4
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
 	.byte	10                              # Abbreviation Code
+	.ascii	"\211\202\001"                  # DW_TAG_GNU_call_site
+	.byte	0                               # DW_CHILDREN_no
+	.byte	49                              # DW_AT_abstract_origin
+	.byte	19                              # DW_FORM_ref4
+	.byte	17                              # DW_AT_low_pc
+	.byte	1                               # DW_FORM_addr
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	11                              # Abbreviation Code
+	.byte	46                              # DW_TAG_subprogram
+	.byte	0                               # DW_CHILDREN_no
+	.byte	110                             # DW_AT_linkage_name
+	.byte	14                              # DW_FORM_strp
+	.byte	3                               # DW_AT_name
+	.byte	14                              # DW_FORM_strp
+	.byte	58                              # DW_AT_decl_file
+	.byte	11                              # DW_FORM_data1
+	.byte	59                              # DW_AT_decl_line
+	.byte	11                              # DW_FORM_data1
+	.byte	60                              # DW_AT_declaration
+	.byte	25                              # DW_FORM_flag_present
+	.byte	63                              # DW_AT_external
+	.byte	25                              # DW_FORM_flag_present
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	12                              # Abbreviation Code
 	.byte	15                              # DW_TAG_pointer_type
 	.byte	0                               # DW_CHILDREN_no
 	.byte	73                              # DW_AT_type
@@ -250,115 +319,126 @@ main:                                   # @main
 	.short	4                               # DWARF version number
 	.long	.debug_abbrev                   # Offset Into Abbrev. Section
 	.byte	8                               # Address Size (in bytes)
-	.byte	1                               # Abbrev [1] 0xb:0xc3 DW_TAG_compile_unit
+	.byte	1                               # Abbrev [1] 0xb:0xcf DW_TAG_compile_unit
 	.long	.Linfo_string0                  # DW_AT_producer
 	.short	33                              # DW_AT_language
 	.long	.Linfo_string1                  # DW_AT_name
 	.long	.Lline_table_start0             # DW_AT_stmt_list
 	.long	.Linfo_string2                  # DW_AT_comp_dir
 	.quad	.Lfunc_begin0                   # DW_AT_low_pc
-	.long	.Lfunc_end1-.Lfunc_begin0       # DW_AT_high_pc
-	.byte	2                               # Abbrev [2] 0x2a:0x1d DW_TAG_subprogram
-	.quad	.Lfunc_begin0                   # DW_AT_low_pc
 	.long	.Lfunc_end0-.Lfunc_begin0       # DW_AT_high_pc
-	.byte	1                               # DW_AT_frame_base
-	.byte	87
-                                        # DW_AT_GNU_all_call_sites
-	.long	71                              # DW_AT_abstract_origin
-	.byte	3                               # Abbrev [3] 0x3d:0x9 DW_TAG_formal_parameter
-	.long	.Ldebug_loc0                    # DW_AT_location
-	.long	87                              # DW_AT_abstract_origin
-	.byte	0                               # End Of Children Mark
-	.byte	4                               # Abbrev [4] 0x47:0x1c DW_TAG_subprogram
+	.byte	2                               # Abbrev [2] 0x2a:0x1c DW_TAG_subprogram
 	.long	.Linfo_string3                  # DW_AT_linkage_name
 	.long	.Linfo_string4                  # DW_AT_name
 	.byte	1                               # DW_AT_decl_file
 	.byte	1                               # DW_AT_decl_line
-	.long	99                              # DW_AT_type
-                                        # DW_AT_external
+	.long	70                              # DW_AT_type
 	.byte	1                               # DW_AT_inline
-	.byte	5                               # Abbrev [5] 0x57:0xb DW_TAG_formal_parameter
+	.byte	3                               # Abbrev [3] 0x3a:0xb DW_TAG_formal_parameter
 	.long	.Linfo_string6                  # DW_AT_name
 	.byte	1                               # DW_AT_decl_file
 	.byte	1                               # DW_AT_decl_line
-	.long	99                              # DW_AT_type
+	.long	70                              # DW_AT_type
 	.byte	0                               # End Of Children Mark
-	.byte	6                               # Abbrev [6] 0x63:0x7 DW_TAG_base_type
+	.byte	4                               # Abbrev [4] 0x46:0x7 DW_TAG_base_type
 	.long	.Linfo_string5                  # DW_AT_name
 	.byte	5                               # DW_AT_encoding
 	.byte	4                               # DW_AT_byte_size
-	.byte	7                               # Abbrev [7] 0x6a:0x52 DW_TAG_subprogram
-	.quad	.Lfunc_begin1                   # DW_AT_low_pc
-	.long	.Lfunc_end1-.Lfunc_begin1       # DW_AT_high_pc
+	.byte	5                               # Abbrev [5] 0x4d:0x70 DW_TAG_subprogram
+	.quad	.Lfunc_begin0                   # DW_AT_low_pc
+	.long	.Lfunc_end0-.Lfunc_begin0       # DW_AT_high_pc
 	.byte	1                               # DW_AT_frame_base
 	.byte	87
                                         # DW_AT_GNU_all_call_sites
-	.long	.Linfo_string7                  # DW_AT_name
+	.long	.Linfo_string9                  # DW_AT_name
 	.byte	1                               # DW_AT_decl_file
 	.byte	5                               # DW_AT_decl_line
-	.long	99                              # DW_AT_type
+	.long	70                              # DW_AT_type
                                         # DW_AT_external
-	.byte	8                               # Abbrev [8] 0x83:0xd DW_TAG_formal_parameter
-	.byte	1                               # DW_AT_location
-	.byte	85
-	.long	.Linfo_string8                  # DW_AT_name
+	.byte	6                               # Abbrev [6] 0x66:0xf DW_TAG_formal_parameter
+	.long	.Ldebug_loc0                    # DW_AT_location
+	.long	.Linfo_string10                 # DW_AT_name
 	.byte	1                               # DW_AT_decl_file
 	.byte	5                               # DW_AT_decl_line
-	.long	99                              # DW_AT_type
-	.byte	8                               # Abbrev [8] 0x90:0xd DW_TAG_formal_parameter
-	.byte	1                               # DW_AT_location
-	.byte	84
-	.long	.Linfo_string9                  # DW_AT_name
+	.long	70                              # DW_AT_type
+	.byte	6                               # Abbrev [6] 0x75:0xf DW_TAG_formal_parameter
+	.long	.Ldebug_loc1                    # DW_AT_location
+	.long	.Linfo_string11                 # DW_AT_name
 	.byte	1                               # DW_AT_decl_file
 	.byte	5                               # DW_AT_decl_line
-	.long	188                             # DW_AT_type
-	.byte	9                               # Abbrev [9] 0x9d:0x1e DW_TAG_inlined_subroutine
-	.long	71                              # DW_AT_abstract_origin
-	.quad	.Lfunc_begin1                   # DW_AT_low_pc
-	.long	0                               # DW_AT_high_pc				# This was manually modified to be 0
+	.long	200                             # DW_AT_type
+	.byte	7                               # Abbrev [7] 0x84:0xf DW_TAG_variable
+	.long	.Ldebug_loc2                    # DW_AT_location
+	.long	.Linfo_string13                 # DW_AT_name
+	.byte	1                               # DW_AT_decl_file
+	.byte	8                               # DW_AT_decl_line
+	.long	70                              # DW_AT_type
+	.byte	8                               # Abbrev [8] 0x93:0x1c DW_TAG_inlined_subroutine
+	.long	42                              # DW_AT_abstract_origin
+	.quad	.Ltmp2                          # DW_AT_low_pc
+	.long	0			                    # DW_AT_high_pc Manually modified
 	.byte	1                               # DW_AT_call_file
-	.byte	6                               # DW_AT_call_line
-	.byte	10                              # DW_AT_call_column
-	.byte	3                               # Abbrev [3] 0xb1:0x9 DW_TAG_formal_parameter
-	.long	.Ldebug_loc1                    # DW_AT_location
-	.long	87                              # DW_AT_abstract_origin
+	.byte	9                               # DW_AT_call_line
+	.byte	32                              # DW_AT_call_column
+	.byte	9                               # Abbrev [9] 0xa7:0x7 DW_TAG_formal_parameter
+	.byte	1                               # DW_AT_location
+	.byte	83
+	.long	58                              # DW_AT_abstract_origin
 	.byte	0                               # End Of Children Mark
+	.byte	10                              # Abbrev [10] 0xaf:0xd DW_TAG_GNU_call_site
+	.long	189                             # DW_AT_abstract_origin
+	.quad	.Ltmp2                          # DW_AT_low_pc
 	.byte	0                               # End Of Children Mark
-	.byte	10                              # Abbrev [10] 0xbc:0x5 DW_TAG_pointer_type
-	.long	193                             # DW_AT_type
-	.byte	10                              # Abbrev [10] 0xc1:0x5 DW_TAG_pointer_type
-	.long	198                             # DW_AT_type
-	.byte	6                               # Abbrev [6] 0xc6:0x7 DW_TAG_base_type
-	.long	.Linfo_string10                 # DW_AT_name
+	.byte	11                              # Abbrev [11] 0xbd:0xb DW_TAG_subprogram
+	.long	.Linfo_string7                  # DW_AT_linkage_name
+	.long	.Linfo_string8                  # DW_AT_name
+	.byte	1                               # DW_AT_decl_file
+	.byte	4                               # DW_AT_decl_line
+                                        # DW_AT_declaration
+                                        # DW_AT_external
+	.byte	12                              # Abbrev [12] 0xc8:0x5 DW_TAG_pointer_type
+	.long	205                             # DW_AT_type
+	.byte	12                              # Abbrev [12] 0xcd:0x5 DW_TAG_pointer_type
+	.long	210                             # DW_AT_type
+	.byte	4                               # Abbrev [4] 0xd2:0x7 DW_TAG_base_type
+	.long	.Linfo_string12                 # DW_AT_name
 	.byte	6                               # DW_AT_encoding
 	.byte	1                               # DW_AT_byte_size
 	.byte	0                               # End Of Children Mark
 .Ldebug_info_end0:
 	.section	.debug_str,"MS",@progbits,1
 .Linfo_string0:
-	.asciz	"clang version 15.0.0" # string offset=0
+	.asciz	"clang version 16.0.0" # string offset=0
 .Linfo_string1:
-	.asciz	"main.cpp"                      # string offset=134
+	.asciz	"main.cpp"                      # string offset=105
 .Linfo_string2:
-	.asciz	"." # string offset=143
+	.asciz	"." # string offset=114
 .Linfo_string3:
-	.asciz	"_Z6helperi"                    # string offset=181
+	.asciz	"_ZL6helperi"                   # string offset=152
 .Linfo_string4:
-	.asciz	"helper"                        # string offset=192
+	.asciz	"helper"                        # string offset=164
 .Linfo_string5:
-	.asciz	"int"                           # string offset=199
+	.asciz	"int"                           # string offset=171
 .Linfo_string6:
-	.asciz	"i"                             # string offset=203
+	.asciz	"i"                             # string offset=175
 .Linfo_string7:
-	.asciz	"main"                          # string offset=205
+	.asciz	"_Z13may_not_existv"            # string offset=177
 .Linfo_string8:
-	.asciz	"argc"                          # string offset=210
+	.asciz	"may_not_exist"                 # string offset=196
 .Linfo_string9:
-	.asciz	"argv"                          # string offset=215
+	.asciz	"main"                          # string offset=210
 .Linfo_string10:
-	.asciz	"char"                          # string offset=220
-	.ident	"clang version 15.0.0"
+	.asciz	"argc"                          # string offset=215
+.Linfo_string11:
+	.asciz	"argv"                          # string offset=220
+.Linfo_string12:
+	.asciz	"char"                          # string offset=225
+.Linfo_string13:
+	.asciz	"j"                             # string offset=230
+	.weak	_Z13may_not_existv
+	.ident	"clang version 16.0.0"
 	.section	".note.GNU-stack","",@progbits
 	.addrsig
+	.addrsig_sym _Z13may_not_existv
 	.section	.debug_line,"",@progbits
 .Lline_table_start0: