1*9880d681SAndroid Build Coastguard Worker; RUN: llc -mtriple=arm64-apple-ios -mattr=+reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE-X18 2*9880d681SAndroid Build Coastguard Worker; RUN: llc -mtriple=arm64-freebsd-gnu -mattr=+reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE-X18 3*9880d681SAndroid Build Coastguard Worker; RUN: llc -mtriple=arm64-linux-gnu -o - %s | FileCheck %s 4*9880d681SAndroid Build Coastguard Worker 5*9880d681SAndroid Build Coastguard Worker; x18 is reserved as a platform register on Darwin but not on other 6*9880d681SAndroid Build Coastguard Worker; systems. Create loads of register pressure and make sure this is respected. 7*9880d681SAndroid Build Coastguard Worker 8*9880d681SAndroid Build Coastguard Worker; Also, fp must always refer to a valid frame record, even if it's not the one 9*9880d681SAndroid Build Coastguard Worker; of the current function, so it shouldn't be used either. 10*9880d681SAndroid Build Coastguard Worker 11*9880d681SAndroid Build Coastguard Worker@var = global [30 x i64] zeroinitializer 12*9880d681SAndroid Build Coastguard Worker 13*9880d681SAndroid Build Coastguard Workerdefine void @keep_live() { 14*9880d681SAndroid Build Coastguard Worker %val = load volatile [30 x i64], [30 x i64]* @var 15*9880d681SAndroid Build Coastguard Worker store volatile [30 x i64] %val, [30 x i64]* @var 16*9880d681SAndroid Build Coastguard Worker 17*9880d681SAndroid Build Coastguard Worker; CHECK: ldr x18 18*9880d681SAndroid Build Coastguard Worker; CHECK: str x18 19*9880d681SAndroid Build Coastguard Worker 20*9880d681SAndroid Build Coastguard Worker; CHECK-RESERVE-X18-NOT: ldr fp 21*9880d681SAndroid Build Coastguard Worker; CHECK-RESERVE-X18-NOT: ldr x18 22*9880d681SAndroid Build Coastguard Worker; CHECK-RESERVE-X18: Spill 23*9880d681SAndroid Build Coastguard Worker; CHECK-RESERVE-X18-NOT: ldr fp 24*9880d681SAndroid Build Coastguard Worker; CHECK-RESERVE-X18-NOT: ldr x18 25*9880d681SAndroid Build Coastguard Worker; CHECK-RESERVE-X18: ret 26*9880d681SAndroid Build Coastguard Worker ret void 27*9880d681SAndroid Build Coastguard Worker} 28