<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/68073>68073</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Question: Can't generate right debug info using llvm
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          mttbx
      </td>
    </tr>
</table>

<pre>
    I can't debug the following codes using gdb. When I step to the calling instruction in the gdb, it will run to the end. The following code is generated by myself, so there's maybe some bugs in the codes. But I can't find it, even though I compare them with the code generated by clang. Can you help me? The code is very simple.
```
include "second.dd"

int main() {
  return foo();
}
```

```
int foo() {
  return 3;
}
```

```
; ModuleID = 'xxx/design.dd'
source_filename = "xxx/design.dd"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

define dso_local i64 @main() !dbg !3 {
func.entry:
  %"@ret" = alloca i64, align 8
  br label %block.entry, !dbg !8

block.entry: ; preds = %func.entry
  %call = call i64 @foo(), !dbg !9
  store i64 %call, ptr %"@ret", align 8, !dbg !11
  br label %func.return, !dbg !12

func.return:                                      ; preds = %block.entry
  %0 = load i64, ptr %"@ret", align 8, !dbg !13
  ret i64 %0, !dbg !13
}

declare dso_local i64 @foo()

!llvm.module.flags = !{!0}
!llvm.dbg.cu = !{!1}

!0 = !{i32 2, !"Debug Info Version", i32 3}
!1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "mzc", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
!2 = !DIFile(filename: "design.dd", directory: "xxx")
!3 = distinct !DISubprogram(name: "main", linkageName: "main", scope: !2, file: !2, line: 3, type: !4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !7)
!4 = !DISubroutineType(types: !5)
!5 = !{!6}
!6 = !DIBasicType(name: "i64", size: 64, encoding: DW_ATE_signed)
!7 = !{}
!8 = !DILocation(line: 3, column: 12, scope: !3)
!9 = !DILocation(line: 4, column: 13, scope: !10)
!10 = distinct !DILexicalBlock(scope: !3, file: !2, line: 3, column: 12)
!11 = !DILocation(line: 4, column: 10, scope: !10)
!12 = !DILocation(line: 4, column: 3, scope: !10)
!13 = !DILocation(line: 5, column: 1, scope: !10)
```
```

; ModuleID = xxx/second.dd'
source_filename = "xxx/second.dd"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

define dso_local i64 @foo() !dbg !3 {
func.entry:
  %"@ret" = alloca i64, align 8
  br label %block.entry, !dbg !8

block.entry: ; preds = %func.entry
  store i64 3, ptr %"@ret", align 8, !dbg !9
 br label %func.return, !dbg !11

func.return: ; preds = %block.entry
  %0 = load i64, ptr %"@ret", align 8, !dbg !12
  ret i64 %0, !dbg !12
}

!llvm.module.flags = !{!0}
!llvm.dbg.cu = !{!1}

!0 = !{i32 2, !"Debug Info Version", i32 3}
!1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "mzc", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
!2 = !DIFile(filename: "second.dd", directory: "xxx")
!3 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !2, file: !2, line: 1, type: !4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !1, retainedNodes: !7)
!4 = !DISubroutineType(types: !5)
!5 = !{!6}
!6 = !DIBasicType(name: "i64", size: 64, encoding: DW_ATE_signed)
!7 = !{}
!8 = !DILocation(line: 1, column: 11, scope: !3)
!9 = !DILocation(line: 2, column: 10, scope: !10)
!10 = distinct !DILexicalBlock(scope: !3, file: !2, line: 1, column: 11)
!11 = !DILocation(line: 2, column: 3, scope: !10)
!12 = !DILocation(line: 3, column: 1, scope: !10)
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsWF1v27wV_jX0DWFDImVJvvCFY89DsK57h3R7LwNKPJa5UqTAjyburx9IS69kx02ToeiwoUEgS-I5z_nk4QMxa0WjANZoeYeWuxnz7qjNunWuep5Vmp_W97hmCpHCYQ6Vb7A7Aj5oKfWTUA2uNQeLvQ33Da8W-PcjKHyPrYMOOx2layZlWBfKOuNrJ7TCQsWlhleIbLFw-ElIiY1XgxIovsCfXtjCwuIGFBjmgOPqhNuTBXkIIDYqGkCksLhlpwqw1S3gyjd2sBfdXeA77_AY10EojoULGPAFgqD2zTEI6LZjBoJmi5-EO_6BcelDLZlqFnjLFD5pj48gO9wCovsYwOD2FzAnbEXbSVigZIeSDcqT_j8-ClVLzwEjQizUWvEF54iQXrYXcbhlQiFSIrLCqLg7v8fYgPNG4YPW5zVE-yVU7G5a-4YLboS4AU__M1hE7_BfNfcS7ncY0R1GpHh-fkZkzyH0Xwy0OMta7U0NjwchQbEWenHyQrzPi2OmAYc5c0yyk_ZuUIB5i-gG5h0pEkQ3lMRLeEwvH8NdnsXLXAw3hzIopaScqzLc5INOns0f0pCeS_vOiE6Ozpb5Y57Nvfqs9JOaS6H887xR_qqaHA5CAeZWP0pdM4lFnmGUJdMKk5RXTfihYzkOXtULUM6cEN0MFUJkGeCzxIBDhERXmAy4ATY0N5OiUbgcFCqDJatABs1K6vpzD0m2E6vl1N-pFN3gUNXOALd92MuJX6NTYfdHgXjTRzi26YW11aBnnTZwFj4jBLnOmesop2FdIKXprTCjg-dWvhK_qMtUjG7wm_5eJGOarDEbSVyWmvGhKu-Kik7245Ce5LbMuEH7XqtlmGUvmm0sxXT_klTKL-2ijZt2cZCsGQJLQxuSNBnxe1leNYvaX0qlV14ExYmEoAST3n1EyC4eMPfqoPE_wVihVZ-MIEenBtMIwoV1QtUuqO_ut7rthIR_qDDKyzCSPWsgFHD3--OHzcc_P24fO-ltvATUMGJiH5M0WumM5r4Gc35H2q_1YN7-rXOiFV-Bh7UDkxbCe-OVEy0MvtINjrWAVtjw4i9CRfm9lzKGNiaZpGRIw-5-H_wg5TDxevMXo45sMRcGaqf7rdcPRDKFpDeS8uCrzujGsBaRcoJ-HjERWAr1mTXw8eairXV3kaTrpEmh4jMND-70h3Ds7dg3sQL3e8ma34x2OsjwCN3tx-WH38LDLgxE4WLht9iHSp7R0phucEwo4B_DId4vFNMEZGNOH3xltHdCwafgEymD2UFpOVVaXnZsPm2zfAS8Y1bUPdYkj3ETnzMlvsaX510NqtZcqKZvv82nPz1GosWnpoup6YnZcjT7QdfsnI_yItO1lr6NLZe-qBOd2li9ipVdYdFrrDSZgvWb97LFPsCzqJm8C_MOkfLKk-90zGUcE0vpu_xOvuM3eQ_a95JAXwVbXrn2GtgVS7rJpK6p05kITQjiW3jTSz75_8ibJsz1f5s2jfSHvpciDBTqbbQnfYX2_BxGQ97AaMhNRvOLo_zXOcrFWPnhHCVu529QlHHtzQwl_cVQfhJDSa-OwBdn4DsYCnnnSf8jGcqNON7MUMj7OMXrBOWaKr2FU8z4mvIVXbEZrNN8ldN0RZJidlwfyvTASZHV9ZLzHAjh1YqmWbKscr7iq2wm1iQhNE0SmhRZnhULytOizMqM5AUDRpcoS6BlQi7iTNWmmQlrPazzMinoLB47Nn5QJETBE46LoQeXu5lZB5155RuLskQK6-yI4oSTsP67B-v6WbXtP9ENn9uwEc1x-BIpwhA-f3oMEDNv5ProXBc2ESJ7RPaNcEdfLWrdIrIPMv3PvDP6X1A7RPbROYvIPjr_7wAAAP__SgPThA">