RISC-V: Fix build errors with shNadd/shNadd.uw patterns in zba cost model

Fix a build regression from commit 04a9b554ba1a ("RISC-V: Cost model
for zba extension."):

.../gcc/config/riscv/riscv.c: In function 'bool riscv_rtx_costs(rtx, machine_mode, int, int, int*, bool)':
.../gcc/config/riscv/riscv.c:2018:11: error: 'and' of mutually exclusive equal-tests is always 0 [-Werror]
 2018 |           && IN_RANGE (INTVAL (XEXP (XEXP (x, 0), 0)), 1, 3))
      |           ^~
.../gcc/config/riscv/riscv.c:2047:17: error: unused variable 'ashift_lhs' [-Werror=unused-variable]
 2047 |             rtx ashift_lhs = XEXP (and_lhs, 0);
      |                 ^~~~~~~~~~

by correcting a CONST_INT_P check referring the wrong operand and
getting rid of the unused variable.

	gcc/
	* config/riscv/riscv.c (riscv_rtx_costs): Correct a CONST_INT_P
	check and remove an unused local variable with shNadd/shNadd.uw
	pattern handling.

0 files changed, 0 insertions, 0 deletions