AArch64: add initial NEON support

Patch by Ana Pazos.

- Completed implementation of instruction formats:
AdvSIMD three same
AdvSIMD modified immediate
AdvSIMD scalar pairwise

- Completed implementation of instruction classes
(some of the instructions in these classes
belong to yet unfinished instruction formats):
Vector Arithmetic
Vector Immediate
Vector Pairwise Arithmetic

- Initial implementation of instruction formats:
AdvSIMD scalar two-reg misc
AdvSIMD scalar three same

- Intial implementation of instruction class:
Scalar Arithmetic

- Initial clang changes to support arm v8 intrinsics.
Note: no clang changes for scalar intrinsics function name mangling yet.

- Comprehensive test cases for added instructions
To verify auto codegen, encoding, decoding, diagnosis, intrinsics.

llvm-svn: 187567

1 files changed, 2 insertions, 4 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64Subtarget.cpp b/llvm/lib/Target/AArch64/AArch64Subtarget.cpp
index d17b7382099..d71bb4e9734 100644
--- a/llvm/lib/Target/AArch64/AArch64Subtarget.cpp
+++ b/llvm/lib/Target/AArch64/AArch64Subtarget.cpp
@@ -26,10 +26,8 @@
 using namespace llvm;
 
 AArch64Subtarget::AArch64Subtarget(StringRef TT, StringRef CPU, StringRef FS)
-  : AArch64GenSubtargetInfo(TT, CPU, FS)
-  , HasNEON(true)
-  , HasCrypto(true)
-  , TargetTriple(TT) {
+    : AArch64GenSubtargetInfo(TT, CPU, FS), HasNEON(false), HasCrypto(false),
+      TargetTriple(TT) {
 
   ParseSubtargetFeatures(CPU, FS);
 }