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