1# RUN: llc -mtriple=aarch64-none-linux-gnu -start-before=greedy -stop-after=prologepilog %s -o - | FileCheck %s 2... 3# Ensure that an object with a different stack-id is not allocated to a 4# callee-save slot using stack-slot scavenging. This test saves X28 which 5# creates a hole in the CSR stack region, but it should not be saved to. 6# Instead of saving to SP + 1 (which would be the hole in the region), it 7# should save to SP + 2 (since AArch64 codegen currently does not support 8# (and thus allocate) objects with a stack-id > 0). 9name: test_no_stackslot_scavenging 10# CHECK: name: test_no_stackslot_scavenging 11# CHECK: STRXui $x0, $sp, 2 12tracksRegLiveness: true 13frameInfo: 14 maxAlignment: 16 15stack: 16 - { id: 0, stack-id: noalloc, size: 8, alignment: 8 } 17body: | 18 bb.0.entry: 19 liveins: $x0 20 STRXui $x0, %stack.0, 0 21 ; Force preserve a CSR to create a hole in the CSR stack region. 22 $x28 = IMPLICIT_DEF 23 RET_ReallyLR 24--- 25