[Bug tree-optimization/63593] ICE: verify_gimple failed: incompatible types in PHI argument 0 with -O3 -fno-tree-vectorize

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63593

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
So it seems like tree_transform_and_unroll_loop creates a wrong PHI:
_101 = PHI <pretmp_103(8), ivtmp_47(4)>
where the type of _101 and pretmp_103 is int, and ivtmp_47 is unsigned.  How
that ivtmp_47 gets there is a mystery to me, but it happens during
duplicate_block.