source: icGREP/icgrep-devel/llvm-3.8.0.src/test/CodeGen/AArch64/bitcast.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 1.0 KB
Line 
1; RUN: llc < %s -mtriple=aarch64--linux-gnu | FileCheck %s
2
3; PR23065: SCALAR_TO_VECTOR implies the top elements 1 to N-1 of the N-element vector are undefined.
4
5define <4 x i16> @foo1(<2 x i32> %a) {
6; CHECK-LABEL: foo1:
7; CHECK:       movi     d0, #0000000000000000
8; CHECK-NEXT:  ret
9
10  %1 = shufflevector <2 x i32> <i32 58712, i32 undef>, <2 x i32> %a, <2 x i32> <i32 0, i32 2>
11; Can't optimize the following bitcast to scalar_to_vector.
12  %2 = bitcast <2 x i32> %1 to <4 x i16>
13  %3 = shufflevector <4 x i16> %2, <4 x i16> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
14  ret <4 x i16> %3
15}
16
17define <4 x i16> @foo2(<2 x i32> %a) {
18; CHECK-LABEL: foo2:
19; CHECK:       movi     d0, #0000000000000000
20; CHECK-NEXT:  ret
21
22  %1 = shufflevector <2 x i32> <i32 712, i32 undef>, <2 x i32> %a, <2 x i32> <i32 0, i32 2>
23; Can't optimize the following bitcast to scalar_to_vector.
24  %2 = bitcast <2 x i32> %1 to <4 x i16>
25  %3 = shufflevector <4 x i16> %2, <4 x i16> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
26  ret <4 x i16> %3
27}
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