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

1 files changed, 109 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/ARM64/vclz.ll b/llvm/test/CodeGen/ARM64/vclz.ll
new file mode 100644
index 00000000000..ddc09ed85fa
--- /dev/null
+++ b/llvm/test/CodeGen/ARM64/vclz.ll
@@ -0,0 +1,109 @@
+; RUN: llc -march=arm64 -arm64-neon-syntax=apple < %s | FileCheck %s
+
+define <8 x i8> @test_vclz_u8(<8 x i8> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclz_u8:
+  ; CHECK: clz.8b v0, v0
+  ; CHECK-NEXT: ret
+  %vclz.i = tail call <8 x i8> @llvm.ctlz.v8i8(<8 x i8> %a, i1 false) nounwind
+  ret <8 x i8> %vclz.i
+}
+
+define <8 x i8> @test_vclz_s8(<8 x i8> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclz_s8:
+  ; CHECK: clz.8b v0, v0
+  ; CHECK-NEXT: ret
+  %vclz.i = tail call <8 x i8> @llvm.ctlz.v8i8(<8 x i8> %a, i1 false) nounwind
+  ret <8 x i8> %vclz.i
+}
+
+define <4 x i16> @test_vclz_u16(<4 x i16> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclz_u16:
+  ; CHECK: clz.4h v0, v0
+  ; CHECK-NEXT: ret
+  %vclz1.i = tail call <4 x i16> @llvm.ctlz.v4i16(<4 x i16> %a, i1 false) nounwind
+  ret <4 x i16> %vclz1.i
+}
+
+define <4 x i16> @test_vclz_s16(<4 x i16> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclz_s16:
+  ; CHECK: clz.4h v0, v0
+  ; CHECK-NEXT: ret
+  %vclz1.i = tail call <4 x i16> @llvm.ctlz.v4i16(<4 x i16> %a, i1 false) nounwind
+  ret <4 x i16> %vclz1.i
+}
+
+define <2 x i32> @test_vclz_u32(<2 x i32> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclz_u32:
+  ; CHECK: clz.2s v0, v0
+  ; CHECK-NEXT: ret
+  %vclz1.i = tail call <2 x i32> @llvm.ctlz.v2i32(<2 x i32> %a, i1 false) nounwind
+  ret <2 x i32> %vclz1.i
+}
+
+define <2 x i32> @test_vclz_s32(<2 x i32> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclz_s32:
+  ; CHECK: clz.2s v0, v0
+  ; CHECK-NEXT: ret
+  %vclz1.i = tail call <2 x i32> @llvm.ctlz.v2i32(<2 x i32> %a, i1 false) nounwind
+  ret <2 x i32> %vclz1.i
+}
+
+define <16 x i8> @test_vclzq_u8(<16 x i8> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclzq_u8:
+  ; CHECK: clz.16b v0, v0
+  ; CHECK-NEXT: ret
+  %vclz.i = tail call <16 x i8> @llvm.ctlz.v16i8(<16 x i8> %a, i1 false) nounwind
+  ret <16 x i8> %vclz.i
+}
+
+define <16 x i8> @test_vclzq_s8(<16 x i8> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclzq_s8:
+  ; CHECK: clz.16b v0, v0
+  ; CHECK-NEXT: ret
+  %vclz.i = tail call <16 x i8> @llvm.ctlz.v16i8(<16 x i8> %a, i1 false) nounwind
+  ret <16 x i8> %vclz.i
+}
+
+define <8 x i16> @test_vclzq_u16(<8 x i16> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclzq_u16:
+  ; CHECK: clz.8h v0, v0
+  ; CHECK-NEXT: ret
+  %vclz1.i = tail call <8 x i16> @llvm.ctlz.v8i16(<8 x i16> %a, i1 false) nounwind
+  ret <8 x i16> %vclz1.i
+}
+
+define <8 x i16> @test_vclzq_s16(<8 x i16> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclzq_s16:
+  ; CHECK: clz.8h v0, v0
+  ; CHECK-NEXT: ret
+  %vclz1.i = tail call <8 x i16> @llvm.ctlz.v8i16(<8 x i16> %a, i1 false) nounwind
+  ret <8 x i16> %vclz1.i
+}
+
+define <4 x i32> @test_vclzq_u32(<4 x i32> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclzq_u32:
+  ; CHECK: clz.4s v0, v0
+  ; CHECK-NEXT: ret
+  %vclz1.i = tail call <4 x i32> @llvm.ctlz.v4i32(<4 x i32> %a, i1 false) nounwind
+  ret <4 x i32> %vclz1.i
+}
+
+define <4 x i32> @test_vclzq_s32(<4 x i32> %a) nounwind readnone ssp {
+  ; CHECK-LABEL: test_vclzq_s32:
+  ; CHECK: clz.4s v0, v0
+  ; CHECK-NEXT: ret
+  %vclz1.i = tail call <4 x i32> @llvm.ctlz.v4i32(<4 x i32> %a, i1 false) nounwind
+  ret <4 x i32> %vclz1.i
+}
+
+declare <4 x i32> @llvm.ctlz.v4i32(<4 x i32>, i1) nounwind readnone
+
+declare <8 x i16> @llvm.ctlz.v8i16(<8 x i16>, i1) nounwind readnone
+
+declare <16 x i8> @llvm.ctlz.v16i8(<16 x i8>, i1) nounwind readnone
+
+declare <2 x i32> @llvm.ctlz.v2i32(<2 x i32>, i1) nounwind readnone
+
+declare <4 x i16> @llvm.ctlz.v4i16(<4 x i16>, i1) nounwind readnone
+
+declare <8 x i8> @llvm.ctlz.v8i8(<8 x i8>, i1) nounwind readnone