| ; RUN: llc -mtriple=arm64-apple-ios -o - %s | FileCheck %s --check-prefix=CHECK-DARWIN |
| ; RUN: llc -mtriple=arm64-linux-gnu -o - %s | FileCheck %s |
| |
| ; x18 is reserved as a platform register on Darwin but not on other |
| ; systems. Create loads of register pressure and make sure this is respected. |
| |
| ; Also, fp must always refer to a valid frame record, even if it's not the one |
| ; of the current function, so it shouldn't be used either. |
| |
| @var = global [30 x i64] zeroinitializer |
| |
| define void @keep_live() { |
| %val = load volatile [30 x i64]* @var |
| store volatile [30 x i64] %val, [30 x i64]* @var |
| |
| ; CHECK: ldr x18 |
| ; CHECK: str x18 |
| |
| ; CHECK-DARWIN-NOT: ldr fp |
| ; CHECK-DARWIN-NOT: ldr x18 |
| ; CHECK-DARWIN: Spill |
| ; CHECK-DARWIN-NOT: ldr fp |
| ; CHECK-DARWIN-NOT: ldr x18 |
| ; CHECK-DARWIN: ret |
| ret void |
| } |
