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, 7 insertions, 3 deletions

diff --git a/configure b/configure
index 73326a7..9e74ab6 100755
--- a/configure
+++ b/configure
@@ -1438,8 +1438,8 @@ Optional Features:
                           YES)
   --enable-targets        Build specific host targets: all or
                           target1,target2,... Valid targets are: host, x86,
-                          x86_64, sparc, powerpc, arm, mips, hexagon, xcore,
-                          msp430, nvptx, and cpp (default=all)
+                          x86_64, sparc, powerpc, arm, aarch64, mips, hexagon,
+                          xcore, msp430, nvptx, and cpp (default=all)
   --enable-experimental-targets
                           Build experimental host targets: disable or
                           target1,target2,... (default=disable)
@@ -4008,6 +4008,7 @@ else
   sparc*-*)               llvm_cv_target_arch="Sparc" ;;
   powerpc*-*)             llvm_cv_target_arch="PowerPC" ;;
   arm*-*)                 llvm_cv_target_arch="ARM" ;;
+  aarch64*-*)             llvm_cv_target_arch="AArch64" ;;
   mips-* | mips64-*)      llvm_cv_target_arch="Mips" ;;
   mipsel-* | mips64el-*)  llvm_cv_target_arch="Mips" ;;
   xcore-*)                llvm_cv_target_arch="XCore" ;;
@@ -4041,6 +4042,7 @@ case $host in
   sparc*-*)               host_arch="Sparc" ;;
   powerpc*-*)             host_arch="PowerPC" ;;
   arm*-*)                 host_arch="ARM" ;;
+  aarch64*-*)             host_arch="AArch64" ;;
   mips-* | mips64-*)      host_arch="Mips" ;;
   mipsel-* | mips64el-*)  host_arch="Mips" ;;
   xcore-*)                host_arch="XCore" ;;
@@ -5373,6 +5375,8 @@ else
  ;;
     ARM)         TARGET_HAS_JIT=1
  ;;
+    AArch64)     TARGET_HAS_JIT=0
+ ;;
     Mips)        TARGET_HAS_JIT=1
  ;;
     XCore)       TARGET_HAS_JIT=0
@@ -10489,7 +10493,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 10492 "configure"
+#line 10496 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H