[Bug tree-optimization/21304] [4.0/4.1 regression] very long compile times with large cpp file from kdebindings

["belyshev at depni dot sinp dot msu dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From belyshev at depni dot sinp dot msu dot ru  2005-05-02 03:33 -------
This small testcase exhibits similar behaviour
(though profile says most of time spent in SSA verifier):

-------------------------------------------------------------------------------
#define A0(a) a, 
#define A1(a) A0(a##0) A0(a##1) A0(a##2) A0(a##3) A0(a##4) A0(a##5) A0(a##6)
#define A2(a) A1(a##0) A1(a##1) A1(a##2) A1(a##3) A1(a##4) A1(a##5) A1(a##6)
#define A3(a) A2(a##0) A2(a##1) A2(a##2) A2(a##3) A2(a##4) A2(a##5) A2(a##6)
#define A4(a) A3(a##0) A3(a##1) A3(a##2) A3(a##3) A3(a##4) A3(a##5) A3(a##6)
#define A5(a) A4(a##0) A4(a##1) A4(a##2) A4(a##3) A4(a##4) A4(a##5) A4(a##6)

#define F0(a) int a (void) { bar (table); }
#define F1(a) F0(a##0) F0(a##1) F0(a##2) F0(a##3) F0(a##4) F0(a##5) F0(a##6)
#define F2(a) F1(a##0) F1(a##1) F1(a##2) F1(a##3) F1(a##4) F1(a##5) F1(a##6)
#define F3(a) F2(a##0) F2(a##1) F2(a##2) F2(a##3) F2(a##4) F2(a##5) F2(a##6)
//#define F4(a) F3(a##0) F3(a##1) F3(a##2) F3(a##3) F3(a##4) F3(a##5) F3(a##6)
//#define F5(a) F4(a##0) F4(a##1) F4(a##2) F4(a##3) F4(a##4) F4(a##5) F4(a##6)

int A5(j) *table [] = { A5(&j) 0 };
void bar (int **);

F3(f);
-------------------------------------------------------------------------------

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|c++                         |tree-optimization
     Ever Confirmed|                            |1
  GCC build triplet|powerpc-linux               |
   GCC host triplet|powerpc-linux               |
 GCC target triplet|powerpc-linux               |
      Known to fail|                            |4.0.0 4.0.1 4.1.0
      Known to work|                            |3.4.4
   Last reconfirmed|0000-00-00 00:00:00         |2005-05-02 03:33:56
               date|                            |
            Summary|very long compile times with|[4.0/4.1 regression] very
                   |large cpp file from         |long compile times with
                   |kdebindings                 |large cpp file from
                   |                            |kdebindings


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21304