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/ARM64/2012-05-07-DAGCombineVectorExtract.ll b/llvm/test/CodeGen/ARM64/2012-05-07-DAGCombineVectorExtract.ll
new file mode 100644
index 0000000..a4d37e4
--- /dev/null
+++ b/llvm/test/CodeGen/ARM64/2012-05-07-DAGCombineVectorExtract.ll
@@ -0,0 +1,20 @@
+; RUN: llc < %s -march=arm64 | FileCheck %s
+
+define i32 @foo(<4 x i32> %a, i32 %n) nounwind {
+; CHECK-LABEL: foo:
+; CHECK: fmov w0, s0
+; CHECK-NEXT: ret
+ %b = bitcast <4 x i32> %a to i128
+ %c = trunc i128 %b to i32
+ ret i32 %c
+}
+
+define i64 @bar(<2 x i64> %a, i64 %n) nounwind {
+; CHECK-LABEL: bar:
+; CHECK: fmov x0, d0
+; CHECK-NEXT: ret
+ %b = bitcast <2 x i64> %a to i128
+ %c = trunc i128 %b to i64
+ ret i64 %c
+}
+