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Re: Regression on mainline in tree-vrp.c
On Fri, Apr 22, 2005 at 10:26:25AM -0400, Kazu Hirata wrote:
> Hi Rainer and Steve,
> > | 4.1.0 20050419 (experimental) (i386-pc-solaris2.10) GCC error: |
> > | in set_value_range, at tree-vrp.c:124 |
> > | Error detected at sem_intr.adb:437:1 |
> There seem to be several ways to get to this ICE. set_value_range is
> used in many places in tree-vrp.c. I'll try to take a look at these
> in the next few days.
Here's an even shorter test case.
SUBROUTINE CHER2K(N, C, LDC)
INTEGER I, J, N, LDC
DO 20, J = 1, N
DO 10, I = 1, J
C(I,J) = (0.0E+0, 0.0E+0)
Appears that any nested loops are doomed with -O2 with gfortran.
This is a critical important problem, because almost every
Fortran program that I know contains nested loops.