[RISC-V] Fix wrong CFA during stack probe

temp1 is used by the probe loop for the step size, but we need the final
address of the stack after the loop which resides in temp2.

	PR target/121121
	* config/riscv/riscv.cc (riscv_allocate_and_probe_stack_space):
	Use temp2 instead of temp1 for the CFA note.

(cherry picked from commit b441d735c092f5d60c4a9c7167ed9153003d49fa)

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 962bfe3aea503f67be803a377d23b2cf8136a9dc..bd0046ad2e8ffc4f0c85153db02f739c207b1d7b 100644 (file)
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -8698,7 +8698,7 @@ riscv_allocate_and_probe_stack_space (rtx temp1, HOST_WIDE_INT size)
          /* We want the CFA independent of the stack pointer for the
             duration of the loop.  */
          add_reg_note (insn, REG_CFA_DEF_CFA,
-                       plus_constant (Pmode, temp1,
+                       plus_constant (Pmode, temp2,
                                       initial_cfa_offset + rounded_size));
          RTX_FRAME_RELATED_P (insn) = 1;
        }