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hard_regno_nregs == 0 ?
- From: DJ Delorie <dj at redhat dot com>
- To: gcc at gcc dot gnu dot org
- Date: Tue, 8 Jan 2008 15:13:21 -0500
- Subject: hard_regno_nregs == 0 ?
In rtlanal.c we have these lines:
nregs_ymode = hard_regno_nregs[xregno][ymode];
...
&& (GET_MODE_SIZE (ymode) % nregs_ymode) == 0)
The m32c cc1 crashes here because xregno is 1 and ymode is QI, and
register 1 cannot hold a QI value (there are no QImode ops that take
that register), so hard_regno_nregs[1][QI] is zero, which causes a
SIGFPE.
Which assumption is wrong? That hard_regno_nregs can be zero (m32c),
or that hard_regno_nregs will never be zero (rtlanal)?