[PATCH] D54961: [AArch64] Add command-line option for SSBS

[Pablo Barrio via Phabricator via cfe-commits]

pbarrio created this revision.
pbarrio added reviewers: olista01, samparker, aemerson.
Herald added subscribers: kristof.beyls, javed.absar.

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.


Repository:
  rC Clang

https://reviews.llvm.org/D54961

Files:
  test/Driver/aarch64-ssbs.c


Index: test/Driver/aarch64-ssbs.c
===================================================================
--- /dev/null
+++ test/Driver/aarch64-ssbs.c
@@ -0,0 +1,9 @@
+// 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"


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