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* [Bug middle-end/19650] New: miscompilation of correct code
@ 2005-01-27  1:02 dalej at apple dot com
  2005-01-27  1:08 ` [Bug middle-end/19650] [4.0 Regression] " pinskia at gcc dot gnu dot org
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: dalej at apple dot com @ 2005-01-27  1:02 UTC (permalink / raw)
  To: gcc-bugs

Following program miscompiles with -O1 on (32 bit) Darwin.  Works with -O0.
It appears that RTL generation for

printf (&"cmp.func is %p (expected %p)\n"[0], comparator_matrixD.2001[0][(intD.2) (D.2150 == 2)], 
compare_e_stringD.2019);

is incorrect, but I haven't dug deeply yet.  I will be fixing this unless somebody recognizes it as a dup

#include <stdio.h>

#define test(a) ((a) ? 1 : 0)

typedef int (*arg_cmp_func)();

class Item_func 
{
public:
    enum Functype { UNKNOWN_FUNC, EQ_FUNC, EQUAL_FUNC };
    virtual enum Functype functype() const { return UNKNOWN_FUNC; }
};

class Item_bool_func2 : public Item_func
{
public:
    virtual enum Functype functype() const { return EQUAL_FUNC; }
};

class Arg_comparator 
{
public:
    Item_bool_func2 *owner;
    arg_cmp_func func;
    static arg_cmp_func comparator_matrix[4][2];

    int Arg_comparator::set_compare_func(Item_bool_func2 *item, int type)
    {
        owner = item;

        /****************** problematic line is here ************************/

        func = comparator_matrix[type][test(owner->functype() == Item_func::EQUAL_FUNC)];
        return 0;
    }
};

int compare_string() { return 0; }
int compare_e_string() { return 0; }
int compare_real() { return 0; }
int compare_e_real() { return 0; }
int compare_int_signed() { return 0; }
int compare_e_int() { return 0; }
int compare_row() { return 0; }
int compare_e_row() { return 0; }

arg_cmp_func Arg_comparator::comparator_matrix[4][2] =
    {{&compare_string,     &compare_e_string},
     {&compare_real,       &compare_e_real},
     {&compare_int_signed, &compare_e_int},
     {&compare_row,        &compare_e_row}};


int main()
{
    Arg_comparator cmp;
    Item_bool_func2 equal_func;

    cmp.set_compare_func(&equal_func, 0);
    printf("cmp.func is %p (expected %p)\n", cmp.func, &compare_e_string);
}

-- 
           Summary: miscompilation of correct code
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dalej at apple dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: same
  GCC host triplet: powerpc-apple-darwin8.0.0.b3
GCC target triplet: same


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19650


^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2005-01-31 18:27 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-01-27  1:02 [Bug middle-end/19650] New: miscompilation of correct code dalej at apple dot com
2005-01-27  1:08 ` [Bug middle-end/19650] [4.0 Regression] " pinskia at gcc dot gnu dot org
2005-01-27  1:14 ` pinskia at gcc dot gnu dot org
2005-01-27  1:21 ` dalej at apple dot com
2005-01-27  1:26 ` pinskia at gcc dot gnu dot org
2005-01-27  1:45 ` pinskia at gcc dot gnu dot org
2005-01-28  4:06 ` [Bug middle-end/19650] [4.0 Regression] miscompilating of array acess of (int)(a==2) cvs-commit at gcc dot gnu dot org
2005-01-31 18:01 ` [Bug middle-end/19650] [4.0 Regression] miscompiling " cvs-commit at gcc dot gnu dot org
2005-01-31 18:27 ` dalej at apple dot com

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