Fraser Cormack 1ffc369394 [RISCV] Add a test showing an incorrect vsetvli insertion
This patch adds a reduced test case which identifies an illegal vsetvli
inserted by the compiler. The compiler emits a vsetvli which is intended
to preserve VL with the SEW/LMUL ratio e32/m1 when in fact the VL could
have been set by e64/m2 in a predecessor block.

Differential Revision: https://reviews.llvm.org/D106286
2021-07-23 09:27:06 -07:00
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