[BOLT][DWARF] Add test for DW_AT_ranges input without function output (#81794)

Added a test that relies on -fbasic-block-sections=all and --gc-sections
that exercises a code path that previously printed a warning.

4 files changed, 544 insertions, 15 deletions

diff --git a/bolt/lib/Rewrite/DWARFRewriter.cpp b/bolt/lib/Rewrite/DWARFRewriter.cpp
index 27fa937c7508..592b2352fc9a 100644
--- a/bolt/lib/Rewrite/DWARFRewriter.cpp
+++ b/bolt/lib/Rewrite/DWARFRewriter.cpp
@@ -919,15 +919,10 @@ void DWARFRewriter::updateUnitDebugInfo(
       DIEValue LowPCVal = Die->findAttribute(dwarf::DW_AT_low_pc);
       DIEValue HighPCVal = Die->findAttribute(dwarf::DW_AT_high_pc);
       if (FunctionRanges.empty()) {
-        if (LowPCVal && HighPCVal) {
+        if (LowPCVal && HighPCVal)
           FunctionRanges.push_back({0, HighPCVal.getDIEInteger().getValue()});
-        } else {
-          // I haven't seen this case, but who knows what other compilers
-          // generate.
+        else
           FunctionRanges.push_back({0, 1});
-          errs() << "BOLT-WARNING: [internal-dwarf-error]: subprogram got GCed "
-                    "by the linker, DW_AT_ranges is used\n";
-        }
       }
 
       if (FunctionRanges.size() == 1 && !opts::AlwaysConvertToRanges) {
diff --git a/bolt/test/X86/dwarf4-subprogram-single-gc-ranges.test b/bolt/test/X86/dwarf4-subprogram-single-gc-ranges.test
index 9080052a2991..3e7e765f98b1 100644
--- a/bolt/test/X86/dwarf4-subprogram-single-gc-ranges.test
+++ b/bolt/test/X86/dwarf4-subprogram-single-gc-ranges.test
@@ -2,14 +2,12 @@
 
 # RUN: llvm-mc -dwarf-version=4 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf4-subprogram-single-gc-ranges-main.s -o %t1.o
 # RUN: %clang %cflags %t1.o -o %t.exe -Wl,-q
-# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections &> %t1.txt
-# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt >> %t1.txt
+# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections
+# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt > %t1.txt
 # RUN: cat %t1.txt | FileCheck --check-prefix=POSTCHECK %s
 
 # This test checks BOLT correctly handles DW_TAG_subprogram with Ranges with single entry, when function was GCed.
 
-# POSTCHECK: BOLT-WARNING: [internal-dwarf-error]: subprogram got GCed by the linker, DW_AT_ranges is used
-
 # POSTCHECK: DW_TAG_subprogram
 # POSTCHECK-NEXT: DW_AT_frame_base
 # POSTCHECK-NEXT: DW_AT_linkage_name
diff --git a/bolt/test/X86/dwarf5-empty-function-ranges.s b/bolt/test/X86/dwarf5-empty-function-ranges.s
new file mode 100644
index 000000000000..bfa317808163
--- /dev/null
+++ b/bolt/test/X86/dwarf5-empty-function-ranges.s
@@ -0,0 +1,538 @@
+# REQUIRES: system-linux
+
+# RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %s -o %t1.o
+# RUN: %clang %cflags -dwarf-5 %t1.o -o %t.exe -Wl,-q -Wl,-gc-sections -fuse-ld=lld -Wl,--entry=main
+# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections
+# RUN: llvm-dwarfdump --debug-info %t.exe | FileCheck --check-prefix=PRECHECK %s
+# RUN: llvm-dwarfdump --debug-info %t.bolt | FileCheck --check-prefix=POSTCHECK %s
+
+# PRECHECK:       DW_TAG_subprogram
+# PRECHECK-NEXT:  DW_AT_ranges
+# PRECHECK-NEXT:    [0x0000000000000000
+# PRECHECK-NEXT:    [0x0000000000000000
+# PRECHECK-NEXT:    [0x0000000000000000
+# PRECHECK-NEXT:    [0x0000000000000000
+# PRECHECK-NEXT:  DW_AT_frame_base
+# PRECHECK-NEXT:  DW_AT_linkage_name  ("_Z6helperi")
+# PRECHECK-NEXT:  DW_AT_name  ("helper")
+
+# POSTCHECK:      DW_TAG_subprogram
+# POSTCHECK-NEXT: DW_AT_frame_base
+# POSTCHECK-NEXT: DW_AT_linkage_name  ("_Z6helperi")
+# POSTCHECK-NEXT: DW_AT_name  ("helper")
+# POSTCHECK-NEXT: DW_AT_decl_file
+# POSTCHECK-NEXT: DW_AT_decl_line
+# POSTCHECK-NEXT: DW_AT_type
+# POSTCHECK-NEXT: DW_AT_external
+# POSTCHECK-NEXT: DW_AT_low_pc  (0x0000000000000000)
+# POSTCHECK-NEXT: DW_AT_high_pc (0x0000000000000001)
+
+## Tests BOLT path that handles DW_AT_ranges with no output function ranges.
+
+## clang++ main.cpp -O0 -fno-inline-functions -fbasic-block-sections=all -g2 -S
+## int helper(int argc) {
+##   int x = argc;
+##   if (x == 3)
+##     x++;
+##   else
+##     x--;
+##   return x;
+## }
+## int  main(int argc, char *argv[]) {
+##   int x = argc;
+##   if (x == 3)
+##     x++;
+##   else
+##     x--;
+##   return x;
+## }
+
+	.text
+	.file	"main.cpp"
+	.section	.text._Z6helperi,"ax",@progbits
+	.globl	_Z6helperi                      # -- Begin function _Z6helperi
+	.p2align	4, 0x90
+	.type	_Z6helperi,@function
+_Z6helperi:                             # @_Z6helperi
+.Lfunc_begin0:
+	.file	0 "/repro2" "main.cpp" md5 0x888a2704226ec400f256aa9c2207456c
+	.loc	0 1 0                           # main.cpp:1:0
+	.cfi_startproc
+# %bb.0:                                # %entry
+	pushq	%rbp
+	.cfi_def_cfa_offset 16
+	.cfi_offset %rbp, -16
+	movq	%rsp, %rbp
+	.cfi_def_cfa_register %rbp
+	movl	%edi, -4(%rbp)
+.Ltmp0:
+	.loc	0 2 11 prologue_end             # main.cpp:2:11
+	movl	-4(%rbp), %eax
+	.loc	0 2 7 is_stmt 0                 # main.cpp:2:7
+	movl	%eax, -8(%rbp)
+.Ltmp1:
+	.loc	0 3 9 is_stmt 1                 # main.cpp:3:9
+	cmpl	$3, -8(%rbp)
+.Ltmp2:
+	.loc	0 3 7 is_stmt 0                 # main.cpp:3:7
+	jne	_Z6helperi.__part.2
+	jmp	_Z6helperi.__part.1
+.LBB_END0_0:
+	.cfi_endproc
+	.section	.text._Z6helperi,"ax",@progbits,unique,1
+_Z6helperi.__part.1:                    # %if.then
+	.cfi_startproc
+	.cfi_def_cfa %rbp, 16
+	.cfi_offset %rbp, -16
+	.loc	0 4 6 is_stmt 1                 # main.cpp:4:6
+	movl	-8(%rbp), %eax
+	addl	$1, %eax
+	movl	%eax, -8(%rbp)
+	.loc	0 4 5 is_stmt 0                 # main.cpp:4:5
+	jmp	_Z6helperi.__part.3
+.LBB_END0_1:
+	.size	_Z6helperi.__part.1, .LBB_END0_1-_Z6helperi.__part.1
+	.cfi_endproc
+	.section	.text._Z6helperi,"ax",@progbits,unique,2
+_Z6helperi.__part.2:                    # %if.else
+	.cfi_startproc
+	.cfi_def_cfa %rbp, 16
+	.cfi_offset %rbp, -16
+	.loc	0 6 6 is_stmt 1                 # main.cpp:6:6
+	movl	-8(%rbp), %eax
+	addl	$-1, %eax
+	movl	%eax, -8(%rbp)
+	jmp	_Z6helperi.__part.3
+.LBB_END0_2:
+	.size	_Z6helperi.__part.2, .LBB_END0_2-_Z6helperi.__part.2
+	.cfi_endproc
+	.section	.text._Z6helperi,"ax",@progbits,unique,3
+_Z6helperi.__part.3:                    # %if.end
+	.cfi_startproc
+	.cfi_def_cfa %rbp, 16
+	.cfi_offset %rbp, -16
+	.loc	0 7 10                          # main.cpp:7:10
+	movl	-8(%rbp), %eax
+	.loc	0 7 3 epilogue_begin is_stmt 0  # main.cpp:7:3
+	popq	%rbp
+	.cfi_def_cfa %rsp, 8
+	retq
+.LBB_END0_3:
+	.size	_Z6helperi.__part.3, .LBB_END0_3-_Z6helperi.__part.3
+	.cfi_endproc
+	.section	.text._Z6helperi,"ax",@progbits
+.Lfunc_end0:
+	.size	_Z6helperi, .Lfunc_end0-_Z6helperi
+                                        # -- End function
+	.section	.text.main,"ax",@progbits
+	.globl	main                            # -- Begin function main
+	.p2align	4, 0x90
+	.type	main,@function
+main:                                   # @main
+.Lfunc_begin1:
+	.loc	0 9 0 is_stmt 1                 # main.cpp:9:0
+	.cfi_startproc
+# %bb.0:                                # %entry
+	pushq	%rbp
+	.cfi_def_cfa_offset 16
+	.cfi_offset %rbp, -16
+	movq	%rsp, %rbp
+	.cfi_def_cfa_register %rbp
+	movl	$0, -4(%rbp)
+	movl	%edi, -8(%rbp)
+	movq	%rsi, -16(%rbp)
+.Ltmp3:
+	.loc	0 10 11 prologue_end            # main.cpp:10:11
+	movl	-8(%rbp), %eax
+	.loc	0 10 7 is_stmt 0                # main.cpp:10:7
+	movl	%eax, -20(%rbp)
+.Ltmp4:
+	.loc	0 11 9 is_stmt 1                # main.cpp:11:9
+	cmpl	$3, -20(%rbp)
+.Ltmp5:
+	.loc	0 11 7 is_stmt 0                # main.cpp:11:7
+	jne	main.__part.2
+	jmp	main.__part.1
+.LBB_END1_0:
+	.cfi_endproc
+	.section	.text.main,"ax",@progbits,unique,4
+main.__part.1:                          # %if.then
+	.cfi_startproc
+	.cfi_def_cfa %rbp, 16
+	.cfi_offset %rbp, -16
+	.loc	0 12 6 is_stmt 1                # main.cpp:12:6
+	movl	-20(%rbp), %eax
+	addl	$1, %eax
+	movl	%eax, -20(%rbp)
+	.loc	0 12 5 is_stmt 0                # main.cpp:12:5
+	jmp	main.__part.3
+.LBB_END1_1:
+	.size	main.__part.1, .LBB_END1_1-main.__part.1
+	.cfi_endproc
+	.section	.text.main,"ax",@progbits,unique,5
+main.__part.2:                          # %if.else
+	.cfi_startproc
+	.cfi_def_cfa %rbp, 16
+	.cfi_offset %rbp, -16
+	.loc	0 14 6 is_stmt 1                # main.cpp:14:6
+	movl	-20(%rbp), %eax
+	addl	$-1, %eax
+	movl	%eax, -20(%rbp)
+	jmp	main.__part.3
+.LBB_END1_2:
+	.size	main.__part.2, .LBB_END1_2-main.__part.2
+	.cfi_endproc
+	.section	.text.main,"ax",@progbits,unique,6
+main.__part.3:                          # %if.end
+	.cfi_startproc
+	.cfi_def_cfa %rbp, 16
+	.cfi_offset %rbp, -16
+	.loc	0 15 10                         # main.cpp:15:10
+	movl	-20(%rbp), %eax
+	.loc	0 15 3 epilogue_begin is_stmt 0 # main.cpp:15:3
+	popq	%rbp
+	.cfi_def_cfa %rsp, 8
+	retq
+.LBB_END1_3:
+	.size	main.__part.3, .LBB_END1_3-main.__part.3
+	.cfi_endproc
+	.section	.text.main,"ax",@progbits
+.Lfunc_end1:
+	.size	main, .Lfunc_end1-main
+                                        # -- End function
+	.section	.debug_abbrev,"",@progbits
+	.byte	1                               # Abbreviation Code
+	.byte	17                              # DW_TAG_compile_unit
+	.byte	1                               # DW_CHILDREN_yes
+	.byte	37                              # DW_AT_producer
+	.byte	37                              # DW_FORM_strx1
+	.byte	19                              # DW_AT_language
+	.byte	5                               # DW_FORM_data2
+	.byte	3                               # DW_AT_name
+	.byte	37                              # DW_FORM_strx1
+	.byte	114                             # DW_AT_str_offsets_base
+	.byte	23                              # DW_FORM_sec_offset
+	.byte	16                              # DW_AT_stmt_list
+	.byte	23                              # DW_FORM_sec_offset
+	.byte	27                              # DW_AT_comp_dir
+	.byte	37                              # DW_FORM_strx1
+	.byte	17                              # DW_AT_low_pc
+	.byte	1                               # DW_FORM_addr
+	.byte	85                              # DW_AT_ranges
+	.byte	35                              # DW_FORM_rnglistx
+	.byte	115                             # DW_AT_addr_base
+	.byte	23                              # DW_FORM_sec_offset
+	.byte	116                             # DW_AT_rnglists_base
+	.byte	23                              # DW_FORM_sec_offset
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	2                               # Abbreviation Code
+	.byte	46                              # DW_TAG_subprogram
+	.byte	1                               # DW_CHILDREN_yes
+	.byte	85                              # DW_AT_ranges
+	.byte	35                              # DW_FORM_rnglistx
+	.byte	64                              # DW_AT_frame_base
+	.byte	24                              # DW_FORM_exprloc
+	.byte	110                             # DW_AT_linkage_name
+	.byte	37                              # DW_FORM_strx1
+	.byte	3                               # DW_AT_name
+	.byte	37                              # DW_FORM_strx1
+	.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	63                              # DW_AT_external
+	.byte	25                              # DW_FORM_flag_present
+	.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	24                              # DW_FORM_exprloc
+	.byte	3                               # DW_AT_name
+	.byte	37                              # DW_FORM_strx1
+	.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	4                               # Abbreviation Code
+	.byte	52                              # DW_TAG_variable
+	.byte	0                               # DW_CHILDREN_no
+	.byte	2                               # DW_AT_location
+	.byte	24                              # DW_FORM_exprloc
+	.byte	3                               # DW_AT_name
+	.byte	37                              # DW_FORM_strx1
+	.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	5                               # Abbreviation Code
+	.byte	46                              # DW_TAG_subprogram
+	.byte	1                               # DW_CHILDREN_yes
+	.byte	85                              # DW_AT_ranges
+	.byte	35                              # DW_FORM_rnglistx
+	.byte	64                              # DW_AT_frame_base
+	.byte	24                              # DW_FORM_exprloc
+	.byte	3                               # DW_AT_name
+	.byte	37                              # DW_FORM_strx1
+	.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	63                              # DW_AT_external
+	.byte	25                              # DW_FORM_flag_present
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	6                               # Abbreviation Code
+	.byte	36                              # DW_TAG_base_type
+	.byte	0                               # DW_CHILDREN_no
+	.byte	3                               # DW_AT_name
+	.byte	37                              # DW_FORM_strx1
+	.byte	62                              # DW_AT_encoding
+	.byte	11                              # DW_FORM_data1
+	.byte	11                              # DW_AT_byte_size
+	.byte	11                              # DW_FORM_data1
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	7                               # Abbreviation Code
+	.byte	15                              # DW_TAG_pointer_type
+	.byte	0                               # DW_CHILDREN_no
+	.byte	73                              # DW_AT_type
+	.byte	19                              # DW_FORM_ref4
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	0                               # EOM(3)
+	.section	.debug_info,"",@progbits
+.Lcu_begin0:
+	.long	.Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
+.Ldebug_info_start0:
+	.short	5                               # DWARF version number
+	.byte	1                               # DWARF Unit Type
+	.byte	8                               # Address Size (in bytes)
+	.long	.debug_abbrev                   # Offset Into Abbrev. Section
+	.byte	1                               # Abbrev [1] 0xc:0x82 DW_TAG_compile_unit
+	.byte	0                               # DW_AT_producer
+	.short	33                              # DW_AT_language
+	.byte	1                               # DW_AT_name
+	.long	.Lstr_offsets_base0             # DW_AT_str_offsets_base
+	.long	.Lline_table_start0             # DW_AT_stmt_list
+	.byte	2                               # DW_AT_comp_dir
+	.quad	0                               # DW_AT_low_pc
+	.byte	2                               # DW_AT_ranges
+	.long	.Laddr_table_base0              # DW_AT_addr_base
+	.long	.Lrnglists_table_base0          # DW_AT_rnglists_base
+	.byte	2                               # Abbrev [2] 0x2b:0x23 DW_TAG_subprogram
+	.byte	0                               # DW_AT_ranges
+	.byte	1                               # DW_AT_frame_base
+	.byte	86
+	.byte	3                               # DW_AT_linkage_name
+	.byte	4                               # DW_AT_name
+	.byte	0                               # DW_AT_decl_file
+	.byte	1                               # DW_AT_decl_line
+	.long	123                             # DW_AT_type
+                                        # DW_AT_external
+	.byte	3                               # Abbrev [3] 0x37:0xb DW_TAG_formal_parameter
+	.byte	2                               # DW_AT_location
+	.byte	145
+	.byte	124
+	.byte	7                               # DW_AT_name
+	.byte	0                               # DW_AT_decl_file
+	.byte	1                               # DW_AT_decl_line
+	.long	123                             # DW_AT_type
+	.byte	4                               # Abbrev [4] 0x42:0xb DW_TAG_variable
+	.byte	2                               # DW_AT_location
+	.byte	145
+	.byte	120
+	.byte	8                               # DW_AT_name
+	.byte	0                               # DW_AT_decl_file
+	.byte	2                               # DW_AT_decl_line
+	.long	123                             # DW_AT_type
+	.byte	0                               # End Of Children Mark
+	.byte	5                               # Abbrev [5] 0x4e:0x2d DW_TAG_subprogram
+	.byte	1                               # DW_AT_ranges
+	.byte	1                               # DW_AT_frame_base
+	.byte	86
+	.byte	6                               # DW_AT_name
+	.byte	0                               # DW_AT_decl_file
+	.byte	9                               # DW_AT_decl_line
+	.long	123                             # DW_AT_type
+                                        # DW_AT_external
+	.byte	3                               # Abbrev [3] 0x59:0xb DW_TAG_formal_parameter
+	.byte	2                               # DW_AT_location
+	.byte	145
+	.byte	120
+	.byte	7                               # DW_AT_name
+	.byte	0                               # DW_AT_decl_file
+	.byte	9                               # DW_AT_decl_line
+	.long	123                             # DW_AT_type
+	.byte	3                               # Abbrev [3] 0x64:0xb DW_TAG_formal_parameter
+	.byte	2                               # DW_AT_location
+	.byte	145
+	.byte	112
+	.byte	9                               # DW_AT_name
+	.byte	0                               # DW_AT_decl_file
+	.byte	9                               # DW_AT_decl_line
+	.long	127                             # DW_AT_type
+	.byte	4                               # Abbrev [4] 0x6f:0xb DW_TAG_variable
+	.byte	2                               # DW_AT_location
+	.byte	145
+	.byte	108
+	.byte	8                               # DW_AT_name
+	.byte	0                               # DW_AT_decl_file
+	.byte	10                              # DW_AT_decl_line
+	.long	123                             # DW_AT_type
+	.byte	0                               # End Of Children Mark
+	.byte	6                               # Abbrev [6] 0x7b:0x4 DW_TAG_base_type
+	.byte	5                               # DW_AT_name
+	.byte	5                               # DW_AT_encoding
+	.byte	4                               # DW_AT_byte_size
+	.byte	7                               # Abbrev [7] 0x7f:0x5 DW_TAG_pointer_type
+	.long	132                             # DW_AT_type
+	.byte	7                               # Abbrev [7] 0x84:0x5 DW_TAG_pointer_type
+	.long	137                             # DW_AT_type
+	.byte	6                               # Abbrev [6] 0x89:0x4 DW_TAG_base_type
+	.byte	10                              # 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_rnglists,"",@progbits
+	.long	.Ldebug_list_header_end0-.Ldebug_list_header_start0 # Length
+.Ldebug_list_header_start0:
+	.short	5                               # Version
+	.byte	8                               # Address size
+	.byte	0                               # Segment selector size
+	.long	3                               # Offset entry count
+.Lrnglists_table_base0:
+	.long	.Ldebug_ranges0-.Lrnglists_table_base0
+	.long	.Ldebug_ranges1-.Lrnglists_table_base0
+	.long	.Ldebug_ranges2-.Lrnglists_table_base0
+.Ldebug_ranges0:
+	.byte	3                               # DW_RLE_startx_length
+	.byte	0                               #   start index
+	.uleb128 .LBB_END0_1-_Z6helperi.__part.1 #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	1                               #   start index
+	.uleb128 .LBB_END0_2-_Z6helperi.__part.2 #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	2                               #   start index
+	.uleb128 .LBB_END0_3-_Z6helperi.__part.3 #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	3                               #   start index
+	.uleb128 .Lfunc_end0-.Lfunc_begin0      #   length
+	.byte	0                               # DW_RLE_end_of_list
+.Ldebug_ranges1:
+	.byte	3                               # DW_RLE_startx_length
+	.byte	4                               #   start index
+	.uleb128 .LBB_END1_1-main.__part.1      #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	5                               #   start index
+	.uleb128 .LBB_END1_2-main.__part.2      #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	6                               #   start index
+	.uleb128 .LBB_END1_3-main.__part.3      #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	7                               #   start index
+	.uleb128 .Lfunc_end1-.Lfunc_begin1      #   length
+	.byte	0                               # DW_RLE_end_of_list
+.Ldebug_ranges2:
+	.byte	3                               # DW_RLE_startx_length
+	.byte	0                               #   start index
+	.uleb128 .LBB_END0_1-_Z6helperi.__part.1 #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	1                               #   start index
+	.uleb128 .LBB_END0_2-_Z6helperi.__part.2 #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	2                               #   start index
+	.uleb128 .LBB_END0_3-_Z6helperi.__part.3 #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	3                               #   start index
+	.uleb128 .Lfunc_end0-.Lfunc_begin0      #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	4                               #   start index
+	.uleb128 .LBB_END1_1-main.__part.1      #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	5                               #   start index
+	.uleb128 .LBB_END1_2-main.__part.2      #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	6                               #   start index
+	.uleb128 .LBB_END1_3-main.__part.3      #   length
+	.byte	3                               # DW_RLE_startx_length
+	.byte	7                               #   start index
+	.uleb128 .Lfunc_end1-.Lfunc_begin1      #   length
+	.byte	0                               # DW_RLE_end_of_list
+.Ldebug_list_header_end0:
+	.section	.debug_str_offsets,"",@progbits
+	.long	48                              # Length of String Offsets Set
+	.short	5
+	.short	0
+.Lstr_offsets_base0:
+	.section	.debug_str,"MS",@progbits,1
+.Linfo_string0:
+	.asciz	"clang version 19.0.0git (git@github.com:ayermolo/llvm-project.git a1d8664d409cac2a923176a8e9a731385bde279e)" # string offset=0
+.Linfo_string1:
+	.asciz	"main.cpp"                      # string offset=108
+.Linfo_string2:
+	.asciz	"/repro2" # string offset=117
+.Linfo_string3:
+	.asciz	"_Z6helperi"                    # string offset=162
+.Linfo_string4:
+	.asciz	"helper"                        # string offset=173
+.Linfo_string5:
+	.asciz	"int"                           # string offset=180
+.Linfo_string6:
+	.asciz	"main"                          # string offset=184
+.Linfo_string7:
+	.asciz	"argc"                          # string offset=189
+.Linfo_string8:
+	.asciz	"x"                             # string offset=194
+.Linfo_string9:
+	.asciz	"argv"                          # string offset=196
+.Linfo_string10:
+	.asciz	"char"                          # string offset=201
+	.section	.debug_str_offsets,"",@progbits
+	.long	.Linfo_string0
+	.long	.Linfo_string1
+	.long	.Linfo_string2
+	.long	.Linfo_string3
+	.long	.Linfo_string4
+	.long	.Linfo_string5
+	.long	.Linfo_string6
+	.long	.Linfo_string7
+	.long	.Linfo_string8
+	.long	.Linfo_string9
+	.long	.Linfo_string10
+	.section	.debug_addr,"",@progbits
+	.long	.Ldebug_addr_end0-.Ldebug_addr_start0 # Length of contribution
+.Ldebug_addr_start0:
+	.short	5                               # DWARF version number
+	.byte	8                               # Address size
+	.byte	0                               # Segment selector size
+.Laddr_table_base0:
+	.quad	_Z6helperi.__part.1
+	.quad	_Z6helperi.__part.2
+	.quad	_Z6helperi.__part.3
+	.quad	.Lfunc_begin0
+	.quad	main.__part.1
+	.quad	main.__part.2
+	.quad	main.__part.3
+	.quad	.Lfunc_begin1
+.Ldebug_addr_end0:
+	.ident	"clang version 19.0.0git (git@github.com:ayermolo/llvm-project.git a1d8664d409cac2a923176a8e9a731385bde279e)"
+	.section	".note.GNU-stack","",@progbits
+	.addrsig
+	.section	.debug_line,"",@progbits
+.Lline_table_start0:
diff --git a/bolt/test/X86/dwarf5-subprogram-single-gc-ranges.test b/bolt/test/X86/dwarf5-subprogram-single-gc-ranges.test
index 04b7203a5bea..9f8f895ed5f1 100644
--- a/bolt/test/X86/dwarf5-subprogram-single-gc-ranges.test
+++ b/bolt/test/X86/dwarf5-subprogram-single-gc-ranges.test
@@ -2,14 +2,12 @@
 
 # RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf5-subprogram-single-gc-ranges-main.s -o %t1.o
 # RUN: %clang %cflags %t1.o -o %t.exe -Wl,-q
-# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections &> %t1.txt
-# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt >> %t1.txt
+# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections
+# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt > %t1.txt
 # RUN: cat %t1.txt | FileCheck --check-prefix=POSTCHECK %s
 
 # This test checks BOLT correctly handles DW_TAG_subprogram with Ranges with single entry, when function was GCed.
 
-# POSTCHECK: BOLT-WARNING: [internal-dwarf-error]: subprogram got GCed by the linker, DW_AT_ranges is used
-
 # POSTCHECK: DW_TAG_subprogram
 # POSTCHECK-NEXT: DW_AT_frame_base
 # POSTCHECK-NEXT: DW_AT_linkage_name