From 395421fd980a7aeeef123f5bd1fb28aae07299fa Mon Sep 17 00:00:00 2001 From: Chandler Carruth Date: Thu, 3 Jul 2014 02:12:26 +0000 Subject: [PATCH] [aarch64] Add a test that should have been in r212242 but I forgot to add it. Sorry about that. llvm-svn: 212251 --- llvm/test/CodeGen/AArch64/trunc-v1i64.ll | 63 ++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 llvm/test/CodeGen/AArch64/trunc-v1i64.ll diff --git a/llvm/test/CodeGen/AArch64/trunc-v1i64.ll b/llvm/test/CodeGen/AArch64/trunc-v1i64.ll new file mode 100644 index 0000000..159b8e0 --- /dev/null +++ b/llvm/test/CodeGen/AArch64/trunc-v1i64.ll @@ -0,0 +1,63 @@ +; RUN: llc -mtriple=aarch64-none-linux-gnu -mattr=+neon -verify-machineinstrs < %s | FileCheck %s + +; An optimization in DAG Combiner to fold +; (trunc (concat ... x ...)) -> (concat ..., (trunc x), ...)) +; will generate nodes like: +; v1i32 trunc v1i64, v1i16 trunc v1i64, v1i8 trunc v1i64. +; And such nodes will be defaultly scalarized in type legalization. But such +; scalarization will cause an assertion failure, as v1i64 is a legal type in +; AArch64. We change the default behaviour from be scalarized to be widen. + +; FIXME: Currently XTN is generated for v1i32, but it can be optimized. +; Just like v1i16 and v1i8, there is no XTN generated. + +define <2 x i32> @test_v1i32_0(<1 x i64> %in0) { +; CHECK-LABEL: test_v1i32_0: +; CHECK: xtn v0.2s, v0.2d + %1 = shufflevector <1 x i64> %in0, <1 x i64> undef, <2 x i32> + %2 = trunc <2 x i64> %1 to <2 x i32> + ret <2 x i32> %2 +} + +define <2 x i32> @test_v1i32_1(<1 x i64> %in0) { +; CHECK-LABEL: test_v1i32_1: +; CHECK: xtn v0.2s, v0.2d +; CHECK-NEXT: dup v0.2s, v0.s[0] + %1 = shufflevector <1 x i64> %in0, <1 x i64> undef, <2 x i32> + %2 = trunc <2 x i64> %1 to <2 x i32> + ret <2 x i32> %2 +} + +define <4 x i16> @test_v1i16_0(<1 x i64> %in0) { +; CHECK-LABEL: test_v1i16_0: +; CHECK-NOT: xtn + %1 = shufflevector <1 x i64> %in0, <1 x i64> undef, <4 x i32> + %2 = trunc <4 x i64> %1 to <4 x i16> + ret <4 x i16> %2 +} + +define <4 x i16> @test_v1i16_1(<1 x i64> %in0) { +; CHECK-LABEL: test_v1i16_1: +; CHECK-NOT: xtn +; CHECK: dup v0.4h, v0.h[0] + %1 = shufflevector <1 x i64> %in0, <1 x i64> undef, <4 x i32> + %2 = trunc <4 x i64> %1 to <4 x i16> + ret <4 x i16> %2 +} + +define <8 x i8> @test_v1i8_0(<1 x i64> %in0) { +; CHECK-LABEL: test_v1i8_0: +; CHECK-NOT: xtn + %1 = shufflevector <1 x i64> %in0, <1 x i64> undef, <8 x i32> + %2 = trunc <8 x i64> %1 to <8 x i8> + ret <8 x i8> %2 +} + +define <8 x i8> @test_v1i8_1(<1 x i64> %in0) { +; CHECK-LABEL: test_v1i8_1: +; CHECK-NOT: xtn +; CHECK: dup v0.8b, v0.b[0] + %1 = shufflevector <1 x i64> %in0, <1 x i64> undef, <8 x i32> + %2 = trunc <8 x i64> %1 to <8 x i8> + ret <8 x i8> %2 +} \ No newline at end of file -- 2.7.4