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14c4d9c7b3
Summary: Reserving registers x1-7 is used to support CONFIG_ARM64_LSE_ATOMICS in Linux kernel. This change adds support for reserving registers x1 through x7. Reviewers: javed.absar, phosek, srhines, nickdesaulniers, efriedma Reviewed By: nickdesaulniers, efriedma Subscribers: niravd, jfb, manojgupta, nickdesaulniers, jyknight, efriedma, kristof.beyls, llvm-commits Differential Revision: https://reviews.llvm.org/D48580 llvm-svn: 341706
92 lines
4.2 KiB
LLVM
92 lines
4.2 KiB
LLVM
; RUN: llc -mtriple=arm64-apple-ios -mattr=+reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X18
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; RUN: llc -mtriple=arm64-freebsd-gnu -mattr=+reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X18
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; RUN: llc -mtriple=aarch64-fuchsia -mattr=+reserve-x20 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X20
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; 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
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; RUN: llc -mtriple=arm64-linux-gnu -o - %s | FileCheck %s
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; RUN: llc -mtriple=aarch64-linux-android -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X18
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; RUN: llc -mtriple=aarch64-fuchsia -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X18
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; RUN: llc -mtriple=aarch64-windows -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE --check-prefix=CHECK-RESERVE-X18
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; Test reserve-x# options individually.
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; RUN: llc -mtriple=arm64-linux-gnu -mattr=+reserve-x1 -o - %s | FileCheck %s --check-prefixes=CHECK-RESERVE,CHECK-RESERVE-X1
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; RUN: llc -mtriple=arm64-linux-gnu -mattr=+reserve-x2 -o - %s | FileCheck %s --check-prefixes=CHECK-RESERVE,CHECK-RESERVE-X2
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; RUN: llc -mtriple=arm64-linux-gnu -mattr=+reserve-x3 -o - %s | FileCheck %s --check-prefixes=CHECK-RESERVE,CHECK-RESERVE-X3
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; RUN: llc -mtriple=arm64-linux-gnu -mattr=+reserve-x4 -o - %s | FileCheck %s --check-prefixes=CHECK-RESERVE,CHECK-RESERVE-X4
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; RUN: llc -mtriple=arm64-linux-gnu -mattr=+reserve-x5 -o - %s | FileCheck %s --check-prefixes=CHECK-RESERVE,CHECK-RESERVE-X5
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; RUN: llc -mtriple=arm64-linux-gnu -mattr=+reserve-x6 -o - %s | FileCheck %s --check-prefixes=CHECK-RESERVE,CHECK-RESERVE-X6
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; RUN: llc -mtriple=arm64-linux-gnu -mattr=+reserve-x7 -o - %s | FileCheck %s --check-prefixes=CHECK-RESERVE,CHECK-RESERVE-X7
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; Test multiple of reserve-x# options together.
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; RUN: llc -mtriple=arm64-linux-gnu \
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; RUN: -mattr=+reserve-x1 \
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; RUN: -mattr=+reserve-x2 \
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; RUN: -mattr=+reserve-x18 \
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; RUN: -o - %s | FileCheck %s \
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; RUN: --check-prefix=CHECK-RESERVE \
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; RUN: --check-prefix=CHECK-RESERVE-X1 \
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; RUN: --check-prefix=CHECK-RESERVE-X2 \
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; RUN: --check-prefix=CHECK-RESERVE-X18
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; Test all reserve-x# options together.
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; RUN: llc -mtriple=arm64-linux-gnu \
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; RUN: -mattr=+reserve-x1 \
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; RUN: -mattr=+reserve-x2 \
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; RUN: -mattr=+reserve-x3 \
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; RUN: -mattr=+reserve-x4 \
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; RUN: -mattr=+reserve-x5 \
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; RUN: -mattr=+reserve-x6 \
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; RUN: -mattr=+reserve-x7 \
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; RUN: -mattr=+reserve-x18 \
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; RUN: -mattr=+reserve-x20 \
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; RUN: -o - %s | FileCheck %s \
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; RUN: --check-prefix=CHECK-RESERVE \
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; RUN: --check-prefix=CHECK-RESERVE-X1 \
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; RUN: --check-prefix=CHECK-RESERVE-X2 \
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; RUN: --check-prefix=CHECK-RESERVE-X3 \
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; RUN: --check-prefix=CHECK-RESERVE-X4 \
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; RUN: --check-prefix=CHECK-RESERVE-X5 \
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; RUN: --check-prefix=CHECK-RESERVE-X6 \
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; RUN: --check-prefix=CHECK-RESERVE-X7 \
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; RUN: --check-prefix=CHECK-RESERVE-X18 \
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; RUN: --check-prefix=CHECK-RESERVE-X20
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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], [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-RESERVE-NOT: ldr fp
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; CHECK-RESERVE-X1-NOT: ldr x1,
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; CHECK-RESERVE-X2-NOT: ldr x2,
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; CHECK-RESERVE-X3-NOT: ldr x3,
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; CHECK-RESERVE-X4-NOT: ldr x4,
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; CHECK-RESERVE-X5-NOT: ldr x5,
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; CHECK-RESERVE-X6-NOT: ldr x6,
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; CHECK-RESERVE-X7-NOT: ldr x7,
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; CHECK-RESERVE-X18-NOT: ldr x18
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; CHECK-RESERVE-X20-NOT: ldr x20
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; CHECK-RESERVE: Spill
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; CHECK-RESERVE-NOT: ldr fp
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; CHECK-RESERVE-X1-NOT: ldr x1,
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; CHECK-RESERVE-X2-NOT: ldr x2,
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; CHECK-RESERVE-X3-NOT: ldr x3,
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; CHECK-RESERVE-X4-NOT: ldr x4,
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; CHECK-RESERVE-X5-NOT: ldr x5,
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; CHECK-RESERVE-X6-NOT: ldr x6,
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; CHECK-RESERVE-X7-NOT: ldr x7,
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; CHECK-RESERVE-X18-NOT: ldr x18
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; CHECK-RESERVE-X20-NOT: ldr x20
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; CHECK-RESERVE: ret
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ret void
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}
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