Add AArch64 as an experimental target.

This patch adds support for AArch64 (ARM's 64-bit architecture) to
LLVM in the "experimental" category. Currently, it won't be built
unless requested explicitly.

This initial commit should have support for:
    + Assembly of all scalar (i.e. non-NEON, non-Crypto) instructions
      (except the late addition CRC instructions).
    + CodeGen features required for C++03 and C99.
    + Compilation for the "small" memory model: code+static data <
      4GB.
    + Absolute and position-independent code.
    + GNU-style (i.e. "__thread") TLS.
    + Debugging information.

The principal omission, currently, is performance tuning.

This patch excludes the NEON support also reviewed due to an outbreak of
batshit insanity in our legal department. That will be committed soon bringing
the changes to precisely what has been approved.

Further reviews would be gratefully received.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174054 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 29 insertions, 0 deletions

diff --git a/test/CodeGen/AArch64/i128-align.ll b/test/CodeGen/AArch64/i128-align.ll
new file mode 100644
index 0000000000..2b6d2cdb43
--- /dev/null
+++ b/test/CodeGen/AArch64/i128-align.ll
@@ -0,0 +1,29 @@
+; RUN: llc -march=aarch64 -verify-machineinstrs < %s | FileCheck %s
+
+%struct = type { i32, i128, i8 }
+
+@var = global %struct zeroinitializer
+
+define i64 @check_size() {
+; CHECK: check_size:
+  %starti = ptrtoint %struct* @var to i64
+
+  %endp = getelementptr %struct* @var, i64 1
+  %endi = ptrtoint %struct* %endp to i64
+
+  %diff = sub i64 %endi, %starti
+  ret i64 %diff
+; CHECK: movz x0, #48
+}
+
+define i64 @check_field() {
+; CHECK: check_field:
+  %starti = ptrtoint %struct* @var to i64
+
+  %endp = getelementptr %struct* @var, i64 0, i32 1
+  %endi = ptrtoint i128* %endp to i64
+
+  %diff = sub i64 %endi, %starti
+  ret i64 %diff
+; CHECK: movz x0, #16
+}
\ No newline at end of file