Elvis Wang 8fdae0c7da
[Reland] "[RISCV][TTI] Implement getAddressComputationCost() in RISCV TTI. #149955" (#156386)
This patch implements the `getAddressComputationCost()` in RISCV TTI
which
make the gather/scatter with address calculation more expansive that
stride cost.

Note that the only user of `getAddressComputationCost()` with vector
type is in `VPWidenMemoryRecipe::computeCost()`. So this patch make some
LV tests changes.

I've checked the tests changes in LV and seems those changes can be
divided into two groups.
 * gather/scatter with uniform vector ptr, seems can be optimized to
 masked.load.
 * can optimize to stride load/store.

----
After #155739 landed, the assertion (cost mis-aligned) is fixed.
I've tested llvm-test-suite w/ rva23u64 and rva23u64_zvl1024b locally
and no assertion occurred.
2025-09-02 11:43:27 +08:00
..
2025-08-14 21:21:03 +01:00