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