[Bug bootstrap/27477] New: The H8 port doesn't build

[Bug bootstrap/27477] New: The H8 port doesn't build

[kazu at gcc dot gnu dot org]

While building libstdc++, the build breaks.


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           Summary: The H8 port doesn't build
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kazu at gcc dot gnu dot org
GCC target triplet: h8300-none-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477

[Bug bootstrap/27477] The H8 port doesn't build

[kazu at gcc dot gnu dot org]

------- Comment #1 from kazu at gcc dot gnu dot org  2006-05-08 04:42 -------
Created an attachment (id=11399)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11399&action=view)
testcase

Compile this testcase, derived from libstdc++, with -msx -O2.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477

[Bug rtl-optimization/27477] The H8 port doesn't build

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-05-08 07:09 -------
Reducing.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|bootstrap                   |rtl-optimization
           Keywords|                            |build, ice-on-valid-code
            Version|unknown                     |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477

[Bug rtl-optimization/27477] The H8 port doesn't build

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2006-05-08 17:12 -------
Reduced testcase:
typedef long unsigned int size_t;
struct string
{
    char* _M_data() const;
    size_t size() const ;
    void       push_back(char __c)
    {
        _M_data()[this->size()] = __c;
    }
};
bool _M_use_grouping;
int _M_extract_float(string& __xtrc)
{
    const char* __lit;
    char __c;
    const bool __plus = __c == __lit[1];
    if ( ( __plus || __c == __lit[0] ) && ! _M_use_grouping )
        __xtrc.push_back( __plus ? '+' : '-');
}


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-05-08 17:12:59
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477

[Bug rtl-optimization/27477] The H8 port doesn't build

[kazu at gcc dot gnu dot org]

------- Comment #4 from kazu at gcc dot gnu dot org  2006-05-08 18:55 -------
Reduced to a C testcase:

extern void bar (int c);

int b;

int
foo (int c1, int c2, int c3)
{
  int plus = c1 == c2;
  if ((plus || c1 == c3)
      && ! b)
    bar (plus);
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477

[Bug rtl-optimization/27477] The H8 port doesn't build

[kazu at gcc dot gnu dot org]

-- 

kazu at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |kazu at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477

[Bug rtl-optimization/27477] The H8 port doesn't build

[kazu at gcc dot gnu dot org]

------- Comment #5 from kazu at gcc dot gnu dot org  2006-05-10 14:21 -------
Reduced down to:

extern void bar (int);

int
foo (int a, int b)
{
  int c = a == b;
  if (c)
    bar (c);
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477

[Bug rtl-optimization/27477] The H8 port doesn't build

[kazu at gcc dot gnu dot org]

------- Comment #6 from kazu at gcc dot gnu dot org  2006-05-10 15:00 -------
The combiner seems to be doing something strange:

(insn 13 12 16 2 (set (reg:HI 21)
        (eq:HI (cc0)
            (const_int 0 [0x0]))) 237 {*bstzhireg} (nil)
    (nil))

(insn 16 13 17 2 (set (cc0)
        (reg:HI 21)) 114 {tsthi} (insn_list:REG_DEP_TRUE 13 (nil))
    (nil))

(jump_insn 17 16 19 2 (set (pc)
        (if_then_else (eq (cc0)
                (const_int 0 [0x0]))
            (label_ref:SI 39)
            (pc))) 181 {branch_true} (nil)
    (expr_list:REG_BR_PROB (const_int 5347 [0x14e3])
        (nil)))

is transformed to

(insn 16 13 17 2 (set (pc)
        (if_then_else (ne (cc0)
                (const_int 0 [0x0]))
            (label_ref:SI 39)
            (pc))) 181 {branch_true} (nil)
    (nil))

(jump_insn 17 16 19 2 (set (reg:HI 21)
        (eq:HI (cc0)
            (const_int 0 [0x0]))) 237 {*bstzhireg} (nil)
    (expr_list:REG_BR_PROB (const_int 5347 [0x14e3])
        (nil)))

Note that the combiner puts a branch instruction one insn
before the last insn in the basic block.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477

[Bug rtl-optimization/27477] The H8 port doesn't build

[kazu at gcc dot gnu dot org]

------- Comment #7 from kazu at gcc dot gnu dot org  2006-05-17 21:35 -------
Subject: Bug 27477

Author: kazu
Date: Wed May 17 21:34:57 2006
New Revision: 113872

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=113872
Log:
        PR rtl-optimization/27477
        * combine.c (try_combine): Don't split a parallel consisting
        of two sets into two individual sets if both sets reference
        cc0.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477

[Bug rtl-optimization/27477] The H8 port doesn't build

[kazu at gcc dot gnu dot org]

------- Comment #8 from kazu at gcc dot gnu dot org  2006-05-17 21:37 -------
Just checked in a patch.


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kazu at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477

[Bug rtl-optimization/27477] The H8 port doesn't build

[kazu at gcc dot gnu dot org]

-- 

kazu at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27477