78 lines
2.5 KiB
LLVM
78 lines
2.5 KiB
LLVM
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; RUN: llc -verify-machineinstrs -enable-machine-outliner %s -o - | FileCheck %s
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; RUN: llc -verify-machineinstrs -enable-machine-outliner -aarch64-redzone %s -o - | FileCheck %s -check-prefix=REDZONE
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; Ensure that the MachineOutliner does not fire on functions which use a
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; redzone. We don't care about what's actually outlined here. We just want to
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; force behaviour in the outliner to make sure that it never acts on anything
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; that might have a redzone.
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target triple = "arm64----"
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@x = common global i32 0, align 4
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declare void @baz() #0
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; In AArch64FrameLowering, there are a couple special early exit cases where we
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; *know* we don't use a redzone. The GHC calling convention is one of these
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; cases. Make sure that we know we don't have a redzone even in these cases.
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define cc 10 void @bar() #0 {
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; CHECK-LABEL: bar
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; CHECK: bl OUTLINED_FUNCTION
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; REDZONE-LABEL: bar
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; REDZONE: bl OUTLINED_FUNCTION
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%1 = load i32, i32* @x, align 4
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%2 = add nsw i32 %1, 1
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store i32 %2, i32* @x, align 4
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call void @baz()
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%3 = load i32, i32* @x, align 4
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%4 = add nsw i32 %3, 1
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store i32 %4, i32* @x, align 4
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call void @baz()
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%5 = load i32, i32* @x, align 4
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%6 = add nsw i32 %5, 1
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store i32 %6, i32* @x, align 4
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ret void
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}
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; foo() should have a redzone when compiled with -aarch64-redzone, and no
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; redzone otherwise.
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define void @foo() #0 {
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; CHECK-LABEL: foo
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; CHECK: bl OUTLINED_FUNCTION
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; REDZONE-LABEL: foo
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; REDZONE-NOT: bl OUTLINED_FUNCTION
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%1 = alloca i32, align 4
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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%4 = alloca i32, align 4
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store i32 0, i32* %1, align 4
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store i32 0, i32* %2, align 4
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store i32 0, i32* %3, align 4
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store i32 0, i32* %4, align 4
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%5 = load i32, i32* %1, align 4
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%6 = add nsw i32 %5, 1
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store i32 %6, i32* %1, align 4
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%7 = load i32, i32* %3, align 4
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%8 = add nsw i32 %7, 1
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store i32 %8, i32* %3, align 4
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%9 = load i32, i32* %4, align 4
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%10 = add nsw i32 %9, 1
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store i32 %10, i32* %4, align 4
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%11 = load i32, i32* %2, align 4
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%12 = add nsw i32 %11, 1
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store i32 %12, i32* %2, align 4
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%13 = load i32, i32* %1, align 4
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%14 = add nsw i32 %13, 1
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store i32 %14, i32* %1, align 4
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%15 = load i32, i32* %3, align 4
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%16 = add nsw i32 %15, 1
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store i32 %16, i32* %3, align 4
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%17 = load i32, i32* %4, align 4
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%18 = add nsw i32 %17, 1
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store i32 %18, i32* %4, align 4
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%19 = load i32, i32* %2, align 4
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%20 = add nsw i32 %19, -1
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store i32 %20, i32* %2, align 4
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ret void
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}
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attributes #0 = { noinline nounwind optnone }
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