1 ; RUN: llc -mtriple=arm64-apple-ios -mattr=+reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X18 2 ; RUN: llc -mtriple=arm64-freebsd-gnu -mattr=+reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X18 3 ; RUN: llc -mtriple=aarch64-fuchsia -mattr=+reserve-x20 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X20 4 ; RUN: llc -mtriple=aarch64-fuchsia -mattr=+reserve-x18,+reserve-x20 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X18 --check-prefix=CHECK-RESERVE-X20 5 ; RUN: llc -mtriple=arm64-linux-gnu -o - %s | FileCheck %s 6 ; RUN: llc -mtriple=aarch64-fuchsia -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X18 7 ; RUN: llc -mtriple=aarch64-windows -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X18 8 9 ; x18 is reserved as a platform register on Darwin but not on other 10 ; systems. Create loads of register pressure and make sure this is respected. 11 12 ; Also, fp must always refer to a valid frame record, even if it's not the one 13 ; of the current function, so it shouldn't be used either. 14 15 @var = global [30 x i64] zeroinitializer 16 17 define void @keep_live() { 18 %val = load volatile [30 x i64], [30 x i64]* @var 19 store volatile [30 x i64] %val, [30 x i64]* @var 20 21 ; CHECK: ldr x18 22 ; CHECK: str x18 23 24 ; CHECK-RESERVE-NOT: ldr fp 25 ; CHECK-RESERVE-X18-NOT: ldr x18 26 ; CHECK-RESERVE-X20-NOT: ldr x20 27 ; CHECK-RESERVE: Spill 28 ; CHECK-RESERVE-NOT: ldr fp 29 ; CHECK-RESERVE-X18-NOT: ldr x18 30 ; CHECK-RESERVE-X20-NOT: ldr x20 31 ; CHECK-RESERVE: ret 32 ret void 33 } 34
