Yingwei Zheng b423e1f05d [SDAG][RISCV] Avoid neg instructions when lowering atomic_load_sub with a constant rhs ...

This patch avoids creating (sub x0, rhs) when lowering atomic_load_sub with a constant rhs.
Comparison with GCC: https://godbolt.org/z/c5zPdP7j4

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D158673

2023-09-16 17:09:41 +08:00

29 KiB

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