1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc < %s -mtriple=aarch64 | FileCheck %s
4 ;; This used to cause a backend crash about not being able to
5 ;; select ROTL. Make sure if generates the basic ushr/shl.
6 define <2 x i64> @testcase(ptr %in) {
7 ; CHECK-LABEL: testcase:
9 ; CHECK-NEXT: ldr q1, [x0]
10 ; CHECK-NEXT: shl v0.2d, v1.2d, #56
11 ; CHECK-NEXT: usra v0.2d, v1.2d, #8
13 %1 = load <2 x i64>, ptr %in
14 %2 = lshr <2 x i64> %1, <i64 8, i64 8>
15 %3 = shl <2 x i64> %1, <i64 56, i64 56>
16 %4 = or <2 x i64> %2, %3
20 ;; This used to cause a miscompile because rot combine
21 ;; doesn't handle negative shift well.
22 define i5 @pr59898(i5 %x) {
23 ; CHECK-LABEL: pr59898:
25 ; CHECK-NEXT: ubfx w8, w0, #1, #4
26 ; CHECK-NEXT: orr w0, w8, w0, lsl #4
28 %r1 = call i5 @llvm.fshr.i5(i5 %x, i5 %x, i5 3)
29 %r2 = call i5 @llvm.fshl.i5(i5 %r1, i5 %r1, i5 2)
33 declare i5 @llvm.fshl.i5(i5, i5, i5)
34 declare i5 @llvm.fshr.i5(i5, i5, i5)