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[AArch64] Add command-line option for SSBS 

Summary:
SSBS (Speculative Store Bypass Safe) is only mandatory from 8.5
onwards but is optional from Armv8.0-A. This patch adds testing for
the ssbs command line option, added to allow enabling the feature
in previous Armv8-A architectures to 8.5.

Reviewers: olista01, samparker, aemerson

Reviewed By: samparker

Subscribers: javed.absar, kristof.beyls, cfe-commits

Differential Revision: https://reviews.llvm.org/D54961

llvm-svn: 348142
This commit is contained in:
Pablo Barrio 2018-12-03 14:40:37 +00:00
parent 8ae0f88b13
commit 1a6d6f053d
1 changed files with 9 additions and 0 deletions
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9
clang/test/Driver/aarch64-ssbs.c Normal file
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// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8a+ssbs %s 2>&1 | FileCheck %s
// CHECK: "-target-feature" "+ssbs"
// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8a+nossbs %s 2>&1 | FileCheck %s --check-prefix=NOSSBS
// NOSSBS: "-target-feature" "-ssbs"
// RUN: %clang -### -target aarch64-none-none-eabi %s 2>&1 | FileCheck %s --check-prefix=ABSENTSSBS
// ABSENTSSBS-NOT: "-target-feature" "+ssbs"
// ABSENTSSBS-NOT: "-target-feature" "-ssbs"