1*9880d681SAndroid Build Coastguard Worker; RUN: llc -o - %s | FileCheck %s 2*9880d681SAndroid Build Coastguard Workertarget triple="aarch64--" 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Workerdeclare void @somefunc() 5*9880d681SAndroid Build Coastguard Workerdefine preserve_mostcc void @test_ccmismatch_notail() { 6*9880d681SAndroid Build Coastguard Worker; Ensure that no tail call is used here, as the called function somefunc does 7*9880d681SAndroid Build Coastguard Worker; not preserve enough registers for preserve_mostcc. 8*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test_ccmismatch_notail: 9*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: b somefunc 10*9880d681SAndroid Build Coastguard Worker; CHECK: bl somefunc 11*9880d681SAndroid Build Coastguard Worker tail call void @somefunc() 12*9880d681SAndroid Build Coastguard Worker ret void 13*9880d681SAndroid Build Coastguard Worker} 14*9880d681SAndroid Build Coastguard Worker 15*9880d681SAndroid Build Coastguard Workerdeclare preserve_mostcc void @some_preserve_most_func() 16*9880d681SAndroid Build Coastguard Workerdefine void @test_ccmismatch_tail() { 17*9880d681SAndroid Build Coastguard Worker; We can perform a tail call here, because some_preserve_most_func preserves 18*9880d681SAndroid Build Coastguard Worker; all registers necessary for test_ccmismatch_tail. 19*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test_ccmismatch_tail: 20*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: bl some_preserve_most_func 21*9880d681SAndroid Build Coastguard Worker; CHECK: b some_preserve_most_func 22*9880d681SAndroid Build Coastguard Worker tail call preserve_mostcc void @some_preserve_most_func() 23*9880d681SAndroid Build Coastguard Worker ret void 24*9880d681SAndroid Build Coastguard Worker} 25