[Bug debug/40596] New: [4.5 regression] Bad debug info for local variables on i386.

[ppluzhnikov at google dot com]

The test case from bug 40012 still fails in current mainline @149059 in 32-bit
mode:

--- cut ---
struct list_s {
  struct list_s* next;
};

typedef struct list_s list;

void f1(void*, list*);
int
f0(void* a,
   void* b,
   void* c,
   list* d)
{
    list* problem;
    for(problem = d; problem; problem = problem->next) {
      int variable = 0;
      f1(c, problem);
    }
    return (0);
}

int main()
{
  list a3 = { 0 };
  f0(0, 0, 0, &a3);
  return 0;
}

void f1(void*a, list*b) { }
--- cut ---

gcc-svn-install-149059/bin/gcc -g gcc-pr40012-test.c -m32

gdb -q a.out
(gdb) b main
Breakpoint 1 at 0x80483d9: file gcc-pr40012-test.c, line 24.
(gdb) r

Breakpoint 1, main () at gcc-pr40012-test.c:24
24        list a3 = { 0 };
(gdb) n
25        f0(0, 0, 0, &a3);
(gdb) p &a3
$1 = (list *) 0xffffccb4
(gdb) s
f0 (a=0x0, b=0x0, c=0x0, d=0xffffcc8c) at gcc-pr40012-test.c:15
15          for(problem = d; problem; problem = problem->next) {

Note mismatch between where GDB thinks &a3 is and the actual address.
[AFAICT, this is currently causing 300+ failures in the GDB test suite.]


-- 
           Summary: [4.5 regression] Bad debug info for local variables on
                    i386.
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ppluzhnikov at google dot com
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40596