[PATCH] Fix tree-opt/36891 ICE with vector division and -ffast-math and LIM

[Richard Guenther]

On Sun, Sep 28, 2008 at 3:15 PM, Andrew Pinski <pinskia@gmail.com> wrote:
> Hi,
>  The issue here is two fold, first the vector variable was not being
> marked as a gimple register.  And then we were creating a REAL_CST of
> a vector type which is invalid.
> This patch fixes the issue by marking the newly created variable as a
> gimple register and also creating a VECTOR_CST with all ones for the
> division.
> This patch does assume if the target has vector division, it also has
> vector multiplication.  I don't know of a target which does not have
> that though.
>
> OK? Bootstrapped and tested on i386-darwin with no regressions (Darwin
> has SSE2 turned on by default).

Ok.

Thanks,
Richard.

> Thanks,
> Andrew Pinski
>
> ChangeLog:
> * tree-ssa-loop-im.c (rewrite_reciprocal): Set DECL_GIMPLE_REG_P on
> the newly created variable.
> Create a VECTOR_CST of all 1s for vector types.
>
> testsuite/ChangeLog:
> * gcc.dg/torture/pr36891.c: New testcase.
>