compiler: buggy t-reg move peephole case.

* stdlib/optimize.tl (basic-blocks do-peephole-block): In the
unnecessary copying t-reg case, let's just stay away from
doing it if the source operand is a v-reg. It breaks under the
recent "eval order of variables" commit, indicating that the
conditions that it uses for replacing a v-reg with the t-reg
are not correct. The most likely reason is that the v-reg
can be assigned, but this doesn't show up in the liveness
info which tracks only t-regs.

0 files changed, 0 insertions, 0 deletions