[llvm] 84f431c - [DebugLine] Correct debug line emittion (#157529)

via llvm-commits llvm-commits at lists.llvm.org
Fri Sep 12 10:33:57 PDT 2025


Author: Peter Rong
Date: 2025-09-12T10:33:53-07:00
New Revision: 84f431c35b3fbd5b9c46608689f25a5d29bc0f55

URL: https://github.com/llvm/llvm-project/commit/84f431c35b3fbd5b9c46608689f25a5d29bc0f55
DIFF: https://github.com/llvm/llvm-project/commit/84f431c35b3fbd5b9c46608689f25a5d29bc0f55.diff

LOG: [DebugLine] Correct debug line emittion (#157529)

### Context

#99710 introduced `.loc_label` so we can terminate a line sequence.
However, it did not advance PC properly. This is problematic for
1-instruction functions as it will have zero-length sequence. The test
checked in that PR shows the problem:

```
# CHECK-LINE-TABLE:                  Address            Line   Column File   ISA Discriminator OpIndex Flags
# CHECK-LINE-TABLE-NEXT:             ------------------ ------ ------ ------ --- ------------- ------- -------------
# CHECK-LINE-TABLE-NEXT: 0x00000028: 05 DW_LNS_set_column (1)
# CHECK-LINE-TABLE-NEXT: 0x0000002a: 00 DW_LNE_set_address (0x0000000000000000)
# CHECK-LINE-TABLE-NEXT: 0x00000035: 01 DW_LNS_copy
# CHECK-LINE-TABLE-NEXT:             0x0000000000000000      1      1      1   0             0       0  is_stmt
# CHECK-LINE-TABLE-NEXT: 0x00000036: 00 DW_LNE_end_sequence
# CHECK-LINE-TABLE-NEXT:             0x0000000000000000      1      1      1   0             0       0  is_stmt end_sequence
```

Both rows having PC 0x0 is incorrect, and parsers won't be able to parse
them. See more explanation why this is wrong in #154851.

### Design

This PR attempts to fix this by advancing the PC to the next available
Label, and advance to the end of the section if no Label is available.

### Implementation

- `emitDwarfLineEndEntry` will advance PC to the `CurrLabel`
- If `CurrLabel` is null, its probably a fake LineEntry we introduced in
#110192. In that case look for the next Label
- If still not label can be found, use `null` and
`emitDwarfLineEndEntry` is smart enough to advance PC to the end of the
section
- Rename `LastLabel` to `PrevLabel`, "last" can mean "previous" or
"final", this is ambigous.
- Updated the tests to emit a correct label.

### Note

This fix should render #154986 and #154851 obsolete, they were temporary
fixes and don't resolve the root cause.

---------

Signed-off-by: Peter Rong <PeterRong at meta.com>

Added: 
    llvm/test/DebugInfo/ARM/stmt_seq_macho.test

Modified: 
    llvm/lib/MC/MCDwarf.cpp
    llvm/test/DebugInfo/X86/DW_AT_LLVM_stmt_seq_sec_offset.ll
    llvm/test/MC/ELF/debug-loc-label.s

Removed: 
    


################################################################################
diff  --git a/llvm/lib/MC/MCDwarf.cpp b/llvm/lib/MC/MCDwarf.cpp
index e7c0d37e8f99b..e8f000a584839 100644
--- a/llvm/lib/MC/MCDwarf.cpp
+++ b/llvm/lib/MC/MCDwarf.cpp
@@ -181,7 +181,7 @@ void MCDwarfLineTable::emitOne(
 
   unsigned FileNum, LastLine, Column, Flags, Isa, Discriminator;
   bool IsAtStartSeq;
-  MCSymbol *LastLabel;
+  MCSymbol *PrevLabel;
   auto init = [&]() {
     FileNum = 1;
     LastLine = 1;
@@ -189,21 +189,31 @@ void MCDwarfLineTable::emitOne(
     Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0;
     Isa = 0;
     Discriminator = 0;
-    LastLabel = nullptr;
+    PrevLabel = nullptr;
     IsAtStartSeq = true;
   };
   init();
 
   // Loop through each MCDwarfLineEntry and encode the dwarf line number table.
   bool EndEntryEmitted = false;
-  for (const MCDwarfLineEntry &LineEntry : LineEntries) {
-    MCSymbol *Label = LineEntry.getLabel();
+  for (auto It = LineEntries.begin(); It != LineEntries.end(); ++It) {
+    auto LineEntry = *It;
+    MCSymbol *CurrLabel = LineEntry.getLabel();
     const MCAsmInfo *asmInfo = MCOS->getContext().getAsmInfo();
 
     if (LineEntry.LineStreamLabel) {
       if (!IsAtStartSeq) {
-        MCOS->emitDwarfLineEndEntry(Section, LastLabel,
-                                    /*EndLabel =*/LastLabel);
+        auto *Label = CurrLabel;
+        auto NextIt = It + 1;
+        // LineEntry with a null Label is probably a fake LineEntry we added
+        // when `-emit-func-debug-line-table-offsets` in order to terminate the
+        // sequence. Look for the next Label if possible, otherwise we will set
+        // the PC to the end of the section.
+        if (!Label && NextIt != LineEntries.end()) {
+          Label = NextIt->getLabel();
+        }
+        MCOS->emitDwarfLineEndEntry(Section, PrevLabel,
+                                    /*EndLabel =*/Label);
         init();
       }
       MCOS->emitLabel(LineEntry.LineStreamLabel, LineEntry.StreamLabelDefLoc);
@@ -211,7 +221,7 @@ void MCDwarfLineTable::emitOne(
     }
 
     if (LineEntry.IsEndEntry) {
-      MCOS->emitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, Label,
+      MCOS->emitDwarfAdvanceLineAddr(INT64_MAX, PrevLabel, CurrLabel,
                                      asmInfo->getCodePointerSize());
       init();
       EndEntryEmitted = true;
@@ -258,12 +268,12 @@ void MCDwarfLineTable::emitOne(
     // At this point we want to emit/create the sequence to encode the delta in
     // line numbers and the increment of the address from the previous Label
     // and the current Label.
-    MCOS->emitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label,
+    MCOS->emitDwarfAdvanceLineAddr(LineDelta, PrevLabel, CurrLabel,
                                    asmInfo->getCodePointerSize());
 
     Discriminator = 0;
     LastLine = LineEntry.getLine();
-    LastLabel = Label;
+    PrevLabel = CurrLabel;
     IsAtStartSeq = false;
   }
 
@@ -273,7 +283,7 @@ void MCDwarfLineTable::emitOne(
   // does not track ranges nor terminate the line table. In that case,
   // conservatively use the section end symbol to end the line table.
   if (!EndEntryEmitted && !IsAtStartSeq)
-    MCOS->emitDwarfLineEndEntry(Section, LastLabel);
+    MCOS->emitDwarfLineEndEntry(Section, PrevLabel);
 }
 
 void MCDwarfLineTable::endCurrentSeqAndEmitLineStreamLabel(MCStreamer *MCOS,

diff  --git a/llvm/test/DebugInfo/ARM/stmt_seq_macho.test b/llvm/test/DebugInfo/ARM/stmt_seq_macho.test
new file mode 100644
index 0000000000000..f0874bfc45ed2
--- /dev/null
+++ b/llvm/test/DebugInfo/ARM/stmt_seq_macho.test
@@ -0,0 +1,98 @@
+// RUN: split-file %s %t
+
+// RUN: clang++ --target=arm64-apple-macos11 \
+// RUN:   %t/stmt_seq_macho.cpp -o %t/stmt_seq_macho.o \
+// RUN:   -g -Oz -gdwarf-4 -c -mno-outline \
+// RUN:   -mllvm -emit-func-debug-line-table-offsets \
+// RUN:   -fdebug-compilation-dir=/private/tmp/stmt_seq \
+// RUN:   -fno-unwind-tables -fno-exceptions
+
+// RUN: llvm-dwarfdump -all %t/stmt_seq_macho.o | FileCheck %s
+
+// CHECK:                  Address            Line   Column File   ISA Discriminator OpIndex Flags
+// CHECK-NEXT:             ------------------ ------ ------ ------ --- ------------- ------- -------------
+// CHECK-NEXT:             0x0000000000000000      2     33      1   0             0       0  is_stmt prologue_end
+// CHECK-NEXT:             0x0000000000000004      2     33      1   0             0       0  is_stmt end_sequence
+// CHECK-NEXT:             0x0000000000000004      3     33      1   0             0       0  is_stmt prologue_end
+// CHECK-NEXT:             0x0000000000000008      3     33      1   0             0       0  is_stmt end_sequence
+// CHECK-NEXT:             0x0000000000000008      4     33      1   0             0       0  is_stmt prologue_end
+// CHECK-NEXT:             0x000000000000000c      4     33      1   0             0       0  is_stmt end_sequence
+// CHECK-NEXT:             0x000000000000000c      7     10      1   0             0       0  is_stmt prologue_end
+// CHECK-NEXT:             0x0000000000000010      7      3      1   0             0       0
+// CHECK-NEXT:             0x0000000000000014      7      3      1   0             0       0  end_sequence
+// CHECK-NEXT:             0x0000000000000014     12     14      1   0             0       0  is_stmt prologue_end
+// CHECK-NEXT:             0x0000000000000018     12      5      1   0             0       0
+// CHECK-NEXT:             0x000000000000001c     12      5      1   0             0       0  end_sequence
+// CHECK-NEXT:             0x000000000000001c     16     14      1   0             0       0  is_stmt prologue_end
+// CHECK-NEXT:             0x0000000000000020     16      5      1   0             0       0
+// CHECK-NEXT:             0x0000000000000024     16      5      1   0             0       0  end_sequence
+// CHECK-NEXT:             0x0000000000000024     21     14      1   0             0       0  is_stmt prologue_end
+// CHECK-NEXT:             0x0000000000000028     21      5      1   0             0       0
+// CHECK-NEXT:             0x000000000000002c     21      5      1   0             0       0  end_sequence
+// CHECK-NEXT:             0x000000000000002c     25     20      1   0             0       0  is_stmt prologue_end
+// CHECK-NEXT:             0x0000000000000030     26      5      1   0             0       0  is_stmt
+// CHECK-NEXT:             0x0000000000000034     26      5      1   0             0       0  is_stmt end_sequence
+// CHECK-NEXT:             0x0000000000000034     37      0      1   0             0       0  is_stmt
+// CHECK-NEXT:             0x0000000000000044     39     12      1   0             0       0  is_stmt prologue_end
+// CHECK-NEXT:             0x0000000000000050     40     12      1   0             0       0  is_stmt
+// CHECK-NEXT:             0x0000000000000058     40      9      1   0             0       0  is_stmt
+// CHECK-NEXT:             0x000000000000005c     41     12      1   0             0       0  is_stmt
+// CHECK-NEXT:             0x0000000000000068     42     12      1   0             0       0  is_stmt
+// CHECK-NEXT:             0x0000000000000070     41      9      1   0             0       0  is_stmt
+// CHECK-NEXT:             0x0000000000000074     46     18      1   0             0       0  is_stmt
+// CHECK-NEXT:             0x0000000000000084     42      9      1   0             0       0  is_stmt
+// CHECK-NEXT:             0x0000000000000088     47      5      1   0             0       0  is_stmt epilogue_begin
+// CHECK-NEXT:             0x0000000000000098     47      5      1   0             0       0  is_stmt end_sequence
+// CHECK-NEXT:             0x0000000000000098     34     85      1   0             0       0  is_stmt prologue_end
+// CHECK-NEXT:             0x000000000000009c     34     85      1   0             0       0  is_stmt end_sequence
+// CHECK-NEXT:             0x000000000000009c     34     86      1   0             0       0  is_stmt prologue_end
+
+#--- stmt_seq_macho.cpp
+#define ATTRIB extern "C" __attribute__((noinline))
+ATTRIB void function_empty_1() {}
+ATTRIB void function_empty_2() {}
+ATTRIB void function_empty_3() {}
+
+ATTRIB int function1_copy1(int a) {
+  return ++a;
+}
+
+ATTRIB int function3_copy1(int a) {
+    int b = a + 3;
+    return b + 1;
+}
+
+ATTRIB int function2_copy1(int a) {
+    return a - 22;
+}
+
+ATTRIB int function3_copy2(int a) {
+    int b = a + 3;
+    return b + 1;
+}
+
+ATTRIB int function2_copy2(int a) {
+    int result = a - 22;
+    return result;
+}
+
+struct logic_error {
+    logic_error(const char* s) {}
+};
+
+struct length_error : public logic_error {
+    __attribute__((noinline)) explicit length_error(const char* s) : logic_error(s) {}
+};
+
+int main() {
+    int sum = 0;
+    sum += function2_copy2(3);
+    sum += function3_copy2(41);
+    sum += function2_copy1(11);
+    sum += function1_copy1(42);
+    function_empty_1();
+    function_empty_2();
+    function_empty_3();
+    length_error e("test");
+    return sum;
+}

diff  --git a/llvm/test/DebugInfo/X86/DW_AT_LLVM_stmt_seq_sec_offset.ll b/llvm/test/DebugInfo/X86/DW_AT_LLVM_stmt_seq_sec_offset.ll
index 58f6495924b90..f17c6e5429b6b 100644
--- a/llvm/test/DebugInfo/X86/DW_AT_LLVM_stmt_seq_sec_offset.ll
+++ b/llvm/test/DebugInfo/X86/DW_AT_LLVM_stmt_seq_sec_offset.ll
@@ -14,7 +14,7 @@
 ; STMT_SEQ:       DW_AT_LLVM_stmt_sequence [DW_FORM_sec_offset]	(0x00000043)
 ; STMT_SEQ:   DW_AT_name {{.*}}func01
 ; STMT_SEQ:   DW_TAG_subprogram [[[ABBREV_CODE2]]]
-; STMT_SEQ:       DW_AT_LLVM_stmt_sequence [DW_FORM_sec_offset]	(0x00000056)
+; STMT_SEQ:       DW_AT_LLVM_stmt_sequence [DW_FORM_sec_offset]	(0x00000058)
 ; STMT_SEQ:   DW_AT_name {{.*}}main
 
 ;; Check the entire line sequence to see that it's correct
@@ -29,22 +29,23 @@
 ; STMT_SEQ-NEXT:  0x00000050: 05 DW_LNS_set_column (3)
 ; STMT_SEQ-NEXT:  0x00000052: 67 address += 6,  line += 1,  op-index += 0
 ; STMT_SEQ-NEXT:              0x0000000000000006      6      3      0   0             0       0  is_stmt
-; STMT_SEQ-NEXT:  0x00000053: 00 DW_LNE_end_sequence
-; STMT_SEQ-NEXT:              0x0000000000000006      6      3      0   0             0       0  is_stmt end_sequence
-; STMT_SEQ-NEXT:  0x00000056: 04 DW_LNS_set_file (0)
-; STMT_SEQ-NEXT:  0x00000058: 00 DW_LNE_set_address (0x00000008)
-; STMT_SEQ-NEXT:  0x0000005f: 03 DW_LNS_advance_line (10)
-; STMT_SEQ-NEXT:  0x00000061: 01 DW_LNS_copy
+; STMT_SEQ-NEXT:  0x00000053: 02 DW_LNS_advance_pc (addr += 2, op-index += 0)
+; STMT_SEQ-NEXT:  0x00000055: 00 DW_LNE_end_sequence
+; STMT_SEQ-NEXT:              0x0000000000000008      6      3      0   0             0       0  is_stmt end_sequence
+; STMT_SEQ-NEXT:  0x00000058: 04 DW_LNS_set_file (0)
+; STMT_SEQ-NEXT:  0x0000005a: 00 DW_LNE_set_address (0x00000008)
+; STMT_SEQ-NEXT:  0x00000061: 03 DW_LNS_advance_line (10)
+; STMT_SEQ-NEXT:  0x00000063: 01 DW_LNS_copy
 ; STMT_SEQ-NEXT:              0x0000000000000008     10      0      0   0             0       0  is_stmt
-; STMT_SEQ-NEXT:  0x00000062: 05 DW_LNS_set_column (10)
-; STMT_SEQ-NEXT:  0x00000064: 0a DW_LNS_set_prologue_end
-; STMT_SEQ-NEXT:  0x00000065: 83 address += 8,  line += 1,  op-index += 0
+; STMT_SEQ-NEXT:  0x00000064: 05 DW_LNS_set_column (10)
+; STMT_SEQ-NEXT:  0x00000066: 0a DW_LNS_set_prologue_end
+; STMT_SEQ-NEXT:  0x00000067: 83 address += 8,  line += 1,  op-index += 0
 ; STMT_SEQ-NEXT:              0x0000000000000010     11     10      0   0             0       0  is_stmt prologue_end
-; STMT_SEQ-NEXT:  0x00000066: 05 DW_LNS_set_column (3)
-; STMT_SEQ-NEXT:  0x00000068: 9f address += 10,  line += 1,  op-index += 0
+; STMT_SEQ-NEXT:  0x00000068: 05 DW_LNS_set_column (3)
+; STMT_SEQ-NEXT:  0x0000006a: 9f address += 10,  line += 1,  op-index += 0
 ; STMT_SEQ-NEXT:              0x000000000000001a     12      3      0   0             0       0  is_stmt
-; STMT_SEQ-NEXT:  0x00000069: 02 DW_LNS_advance_pc (addr += 5, op-index += 0)
-; STMT_SEQ-NEXT:  0x0000006b: 00 DW_LNE_end_sequence
+; STMT_SEQ-NEXT:  0x0000006b: 02 DW_LNS_advance_pc (addr += 5, op-index += 0)
+; STMT_SEQ-NEXT:  0x0000006d: 00 DW_LNE_end_sequence
 ; STMT_SEQ-NEXT:              0x000000000000001f     12      3      0   0             0       0  is_stmt end_sequence
 
 ; generated from:

diff  --git a/llvm/test/MC/ELF/debug-loc-label.s b/llvm/test/MC/ELF/debug-loc-label.s
index 6b5d04777bef4..4200b1192107b 100644
--- a/llvm/test/MC/ELF/debug-loc-label.s
+++ b/llvm/test/MC/ELF/debug-loc-label.s
@@ -17,43 +17,47 @@
 # CHECK-LINE-TABLE-NEXT: 0x0000002a: 00 DW_LNE_set_address (0x0000000000000000)
 # CHECK-LINE-TABLE-NEXT: 0x00000035: 01 DW_LNS_copy
 # CHECK-LINE-TABLE-NEXT:             0x0000000000000000      1      1      1   0             0       0  is_stmt
-# CHECK-LINE-TABLE-NEXT: 0x00000036: 00 DW_LNE_end_sequence
-# CHECK-LINE-TABLE-NEXT:             0x0000000000000000      1      1      1   0             0       0  is_stmt end_sequence
-# CHECK-LINE-TABLE-NEXT: 0x00000039: 05 DW_LNS_set_column (2)
-# CHECK-LINE-TABLE-NEXT: 0x0000003b: 00 DW_LNE_set_address (0x0000000000000008)
-# CHECK-LINE-TABLE-NEXT: 0x00000046: 01 DW_LNS_copy
+# CHECK-LINE-TABLE-NEXT: 0x00000036: 02 DW_LNS_advance_pc (addr += 8, op-index += 0)
+# CHECK-LINE-TABLE-NEXT: 0x00000038: 00 DW_LNE_end_sequence
+# CHECK-LINE-TABLE-NEXT:             0x0000000000000008      1      1      1   0             0       0  is_stmt end_sequence
+# CHECK-LINE-TABLE-NEXT: 0x0000003b: 05 DW_LNS_set_column (2)
+# CHECK-LINE-TABLE-NEXT: 0x0000003d: 00 DW_LNE_set_address (0x0000000000000008)
+# CHECK-LINE-TABLE-NEXT: 0x00000048: 01 DW_LNS_copy
 # CHECK-LINE-TABLE-NEXT:             0x0000000000000008      1      2      1   0             0       0  is_stmt
-# CHECK-LINE-TABLE-NEXT: 0x00000047: 00 DW_LNE_end_sequence
-# CHECK-LINE-TABLE-NEXT:             0x0000000000000008      1      2      1   0             0       0  is_stmt end_sequence
-# CHECK-LINE-TABLE-NEXT: 0x0000004a: 05 DW_LNS_set_column (3)
-# CHECK-LINE-TABLE-NEXT: 0x0000004c: 00 DW_LNE_set_address (0x0000000000000010)
-# CHECK-LINE-TABLE-NEXT: 0x00000057: 01 DW_LNS_copy
+# CHECK-LINE-TABLE-NEXT: 0x00000049: 02 DW_LNS_advance_pc (addr += 8, op-index += 0)
+# CHECK-LINE-TABLE-NEXT: 0x0000004b: 00 DW_LNE_end_sequence
+# CHECK-LINE-TABLE-NEXT:             0x0000000000000010      1      2      1   0             0       0  is_stmt end_sequence
+# CHECK-LINE-TABLE-NEXT: 0x0000004e: 05 DW_LNS_set_column (3)
+# CHECK-LINE-TABLE-NEXT: 0x00000050: 00 DW_LNE_set_address (0x0000000000000010)
+# CHECK-LINE-TABLE-NEXT: 0x0000005b: 01 DW_LNS_copy
 # CHECK-LINE-TABLE-NEXT:             0x0000000000000010      1      3      1   0             0       0  is_stmt
-# CHECK-LINE-TABLE-NEXT: 0x00000058: 00 DW_LNE_end_sequence
-# CHECK-LINE-TABLE-NEXT:             0x0000000000000010      1      3      1   0             0       0  is_stmt end_sequence
-# CHECK-LINE-TABLE-NEXT: 0x0000005b: 05 DW_LNS_set_column (4)
-# CHECK-LINE-TABLE-NEXT: 0x0000005d: 00 DW_LNE_set_address (0x0000000000000018)
-# CHECK-LINE-TABLE-NEXT: 0x00000068: 01 DW_LNS_copy
+# CHECK-LINE-TABLE-NEXT: 0x0000005c: 02 DW_LNS_advance_pc (addr += 8, op-index += 0)
+# CHECK-LINE-TABLE-NEXT: 0x0000005e: 00 DW_LNE_end_sequence
+# CHECK-LINE-TABLE-NEXT:             0x0000000000000018      1      3      1   0             0       0  is_stmt end_sequence
+# CHECK-LINE-TABLE-NEXT: 0x00000061: 05 DW_LNS_set_column (4)
+# CHECK-LINE-TABLE-NEXT: 0x00000063: 00 DW_LNE_set_address (0x0000000000000018)
+# CHECK-LINE-TABLE-NEXT: 0x0000006e: 01 DW_LNS_copy
 # CHECK-LINE-TABLE-NEXT:             0x0000000000000018      1      4      1   0             0       0  is_stmt
-# CHECK-LINE-TABLE-NEXT: 0x00000069: 05 DW_LNS_set_column (5)
-# CHECK-LINE-TABLE-NEXT: 0x0000006b: 01 DW_LNS_copy
+# CHECK-LINE-TABLE-NEXT: 0x0000006f: 05 DW_LNS_set_column (5)
+# CHECK-LINE-TABLE-NEXT: 0x00000071: 01 DW_LNS_copy
 # CHECK-LINE-TABLE-NEXT:             0x0000000000000018      1      5      1   0             0       0  is_stmt
-# CHECK-LINE-TABLE-NEXT: 0x0000006c: 00 DW_LNE_end_sequence
-# CHECK-LINE-TABLE-NEXT:             0x0000000000000018      1      5      1   0             0       0  is_stmt end_sequence
+# CHECK-LINE-TABLE-NEXT: 0x00000072: 02 DW_LNS_advance_pc (addr += 8, op-index += 0)
+# CHECK-LINE-TABLE-NEXT: 0x00000074: 00 DW_LNE_end_sequence
+# CHECK-LINE-TABLE-NEXT:             0x0000000000000020      1      5      1   0             0       0  is_stmt end_sequence
 
 # CHECK-SYM:      Symbol table '.symtab' contains 9 entries:
 # CHECK-SYM-NEXT:    Num:    Value          Size Type    Bind   Vis       Ndx Name
 # CHECK-SYM-NEXT:      0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND
 # CHECK-SYM-NEXT:      1: 0000000000000000     0 FILE    LOCAL  DEFAULT   ABS test.c
 # CHECK-SYM-NEXT:      2: 0000000000000000     0 SECTION LOCAL  DEFAULT     2 .text
-# CHECK-SYM-NEXT:      3: 0000000000000039     0 NOTYPE  LOCAL  DEFAULT     3 my_label_02
-# CHECK-SYM-NEXT:      4: 000000000000004a     0 NOTYPE  LOCAL  DEFAULT     3 my_label_03
-# CHECK-SYM-NEXT:      5: 000000000000005b     0 NOTYPE  LOCAL  DEFAULT     3 my_label_04
-# CHECK-SYM-NEXT:      6: 000000000000004a     0 NOTYPE  LOCAL  DEFAULT     3 my_label_03.1
-# CHECK-SYM-NEXT:      7: 000000000000006f     0 NOTYPE  LOCAL  DEFAULT     3 my_label_05
+# CHECK-SYM-NEXT:      3: 000000000000003b     0 NOTYPE  LOCAL  DEFAULT     3 my_label_02
+# CHECK-SYM-NEXT:      4: 000000000000004e     0 NOTYPE  LOCAL  DEFAULT     3 my_label_03
+# CHECK-SYM-NEXT:      5: 0000000000000061     0 NOTYPE  LOCAL  DEFAULT     3 my_label_04
+# CHECK-SYM-NEXT:      6: 000000000000004e     0 NOTYPE  LOCAL  DEFAULT     3 my_label_03.1
+# CHECK-SYM-NEXT:      7: 0000000000000077     0 NOTYPE  LOCAL  DEFAULT     3 my_label_05
 # CHECK-SYM-NEXT:      8: 0000000000000000     0 FUNC    GLOBAL DEFAULT     2 foo
 
-# CHECK-OFFSETS: 0000 39000000 4a000000 5b000000
+# CHECK-OFFSETS: 0000 3b000000 4e000000 61000000
 
 	.text
 	.file	"test.c"


        


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