[Bug c/60101] [4.7/4.8/4.9 Regression] Long compile times when mixed complex floating point datatypes are used in lengthy expressions

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60101

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |4.4.7
           Keywords|                            |compile-time-hog,
                   |                            |diagnostic
   Last reconfirmed|                            |2014-02-07
     Ever confirmed|0                           |1
            Summary|Long compile times when     |[4.7/4.8/4.9 Regression]
                   |mixed complex floating      |Long compile times when
                   |point datatypes are used in |mixed complex floating
                   |lengthy expressions         |point datatypes are used in
                   |                            |lengthy expressions
   Target Milestone|---                         |4.7.4
      Known to fail|                            |4.5.4, 4.6.4, 4.7.2, 4.8.2,
                   |                            |4.9.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks like we spend all time in c-common.c:verify_sequence_points ().  Not sure
why double.c compiles instantly.  Using the C++ frontend also makes float.c
compile instantly.

Regression from at 4.4.