ARM64: initial backend import
This adds a second implementation of the AArch64 architecture to LLVM,
accessible in parallel via the "arm64" triple. The plan over the
coming weeks & months is to merge the two into a single backend,
during which time thorough code review should naturally occur.
Everything will be easier with the target in-tree though, hence this
commit.
llvm-svn: 205090
diff --git a/llvm/test/CodeGen/ARM64/tls-darwin.ll b/llvm/test/CodeGen/ARM64/tls-darwin.ll
new file mode 100644
index 0000000..5e8ec33
--- /dev/null
+++ b/llvm/test/CodeGen/ARM64/tls-darwin.ll
@@ -0,0 +1,18 @@
+; RUN: llc -mtriple=arm64-apple-ios7.0 %s -o - | FileCheck %s
+
+@var = thread_local global i8 0
+
+; N.b. x0 must be the result of the first load (i.e. the address of the
+; descriptor) when tlv_get_addr is called. Likewise the result is returned in
+; x0.
+define i8 @get_var() {
+; CHECK-LABEL: get_var:
+; CHECK: adrp x[[TLVPDESC_SLOT_HI:[0-9]+]], _var@TLVPPAGE
+; CHECK: ldr x0, [x[[TLVPDESC_SLOT_HI]], _var@TLVPPAGEOFF]
+; CHECK: ldr [[TLV_GET_ADDR:x[0-9]+]], [x0]
+; CHECK: blr [[TLV_GET_ADDR]]
+; CHECK: ldrb w0, [x0]
+
+ %val = load i8* @var, align 1
+ ret i8 %val
+}