29 lines
1.0 KiB
LLVM
29 lines
1.0 KiB
LLVM
; RUN: llc -mtriple=arm64-apple-ios -mattr=+reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE-X18
|
|
; RUN: llc -mtriple=arm64-freebsd-gnu -mattr=+reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE-X18
|
|
; RUN: llc -mtriple=arm64-linux-gnu -o - %s | FileCheck %s
|
|
; RUN: llc -mtriple=aarch64-windows -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE-X18
|
|
|
|
; 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], [30 x i64]* @var
|
|
store volatile [30 x i64] %val, [30 x i64]* @var
|
|
|
|
; CHECK: ldr x18
|
|
; CHECK: str x18
|
|
|
|
; CHECK-RESERVE-X18-NOT: ldr fp
|
|
; CHECK-RESERVE-X18-NOT: ldr x18
|
|
; CHECK-RESERVE-X18: Spill
|
|
; CHECK-RESERVE-X18-NOT: ldr fp
|
|
; CHECK-RESERVE-X18-NOT: ldr x18
|
|
; CHECK-RESERVE-X18: ret
|
|
ret void
|
|
}
|