Jim Lin 7e9293572d [RISCV] Set how many bytes load from or store to stack slot
Refer from: https://reviews.llvm.org/D44782

After https://reviews.llvm.org/D130302, LW+SEXT.B can be folded into LB
as partially reload stack slot. This gains incorrect optimization result
from `StackSlotColoring` without given the number of bytes exactly load
from stack. LB+SW are mis-interpreted as fully reload/restore from stack
slot without the sign-extension. SW would be considered as a redundant store.

The testcase is copied from llvm/test/CodeGen/X86/pr30821.mir.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D145471
2023-03-10 10:14:59 +08:00
..
2021-08-04 12:45:18 -07:00