optimization/6798: [3.2/3.3/3.4 regression] very long compile time with large case-statement

[bangerth@dealii.org]

Old Synopsis: cc1 -O2 in semi-infinite loop on sparc
New Synopsis: [3.2/3.3/3.4 regression] very long compile time with large case-statement

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Wed Jan 15 08:27:38 2003
State-Changed-Why:
    I can also reproduce this on a Linux machine. The testcase
    is basically an enormous yacc-generated switch-statement, 
    with about 2000 cases and a lot of cross-jumping. I killed
    the compilation after about 10 minutes.
    
    The code compiled in just 24 seconds with 2.95 even with 
    -O2, so this is a regression.
    I attach a significantly cleaned up testcase as "testcase.i".
    
    W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6798