[ARM] Add subtarget features for ARMv8.2-A

This adds subtarget features for ARMv8.2-A, which builds on (and
requires the features from) ARMv8.1-A. Most assembler-visible features
of ARMv8.2-A are system instructions, and are all required parts of the
architecture, so just depend on the HasV8_2aOps subtarget feature.
There is also one large, optional feature, which adds 16-bit floating
point versions of all existing floating-point instructions (VFP and
SIMD), this is represented by the FeatureFullFP16 subtarget feature.

Differential Revision: http://reviews.llvm.org/D15036

llvm-svn: 254399

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM/ARMSubtarget.cpp b/llvm/lib/Target/ARM/ARMSubtarget.cpp
index 9e3cd36..bb6ae28 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.cpp
+++ b/llvm/lib/Target/ARM/ARMSubtarget.cpp
@@ -112,6 +112,7 @@ void ARMSubtarget::initializeEnvironment() {
   HasV7Ops = false;
   HasV8Ops = false;
   HasV8_1aOps = false;
+  HasV8_2aOps = false;
   HasVFPv2 = false;
   HasVFPv3 = false;
   HasVFPv4 = false;
@@ -130,6 +131,7 @@ void ARMSubtarget::initializeEnvironment() {
   NoMovt = false;
   SupportsTailCall = false;
   HasFP16 = false;
+  HasFullFP16 = false;
   HasD16 = false;
   HasHardwareDivide = false;
   HasHardwareDivideInARM = false;