[LLVMbugs] [Bug 23164] New: Nested static vars in same DWARF scope

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23164

            Bug ID: 23164
           Summary: Nested static vars in same DWARF scope
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: paul_robinson at playstation.sony.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

If you have two static variables with the same name in nested lexical blocks:

int main() {
  static float a = 50;
  int b = a;
  {
    static int a = 200;
    b += a;
  }
  return b;
}

You'll find that both DIEs for the two "a" variables are siblings.

 <2><43>: Abbrev Number: 3 (DW_TAG_variable)
    <44>   DW_AT_name        : (indirect string, offset: 0x54): a    
    <48>   DW_AT_type        : <0x7c>    
    <4c>   DW_AT_decl_file   : 1    
    <4d>   DW_AT_decl_line   : 2    
    <4e>   DW_AT_location    : 9 byte block: 3 0 0 0 0 0 0 0 0     (DW_OP_addr:
0)
 <2><58>: Abbrev Number: 3 (DW_TAG_variable)
    <59>   DW_AT_name        : (indirect string, offset: 0x54): a    
    <5d>   DW_AT_type        : <0x83>    
    <61>   DW_AT_decl_file   : 1    
    <62>   DW_AT_decl_line   : 5    
    <63>   DW_AT_location    : 9 byte block: 3 4 0 0 0 0 0 0 0     (DW_OP_addr:
4)

There's a lexical_block missing.

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