1 ; Test zero extensions from a byte to an i32.
3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
5 ; Test register extension, starting with an i32.
6 define i32 @f1(i32 %a) {
10 %byte = trunc i32 %a to i8
11 %ext = zext i8 %byte to i32
15 ; ...and again with an i64.
16 define i32 @f2(i64 %a) {
18 ; CHECK: llcr %r2, %r2
20 %byte = trunc i64 %a to i8
21 %ext = zext i8 %byte to i32
25 ; Check ANDs that are equivalent to zero extension.
26 define i32 @f3(i32 %a) {
28 ; CHECK: llcr %r2, %r2
30 %ext = and i32 %a, 255
34 ; Check LLC with no displacement.
35 define i32 @f4(i8 *%src) {
37 ; CHECK: llc %r2, 0(%r2)
40 %ext = zext i8 %byte to i32
44 ; Check the high end of the LLC range.
45 define i32 @f5(i8 *%src) {
47 ; CHECK: llc %r2, 524287(%r2)
49 %ptr = getelementptr i8 *%src, i64 524287
51 %ext = zext i8 %byte to i32
55 ; Check the next byte up, which needs separate address logic.
56 ; Other sequences besides this one would be OK.
57 define i32 @f6(i8 *%src) {
59 ; CHECK: agfi %r2, 524288
60 ; CHECK: llc %r2, 0(%r2)
62 %ptr = getelementptr i8 *%src, i64 524288
64 %ext = zext i8 %byte to i32
68 ; Check the high end of the negative LLC range.
69 define i32 @f7(i8 *%src) {
71 ; CHECK: llc %r2, -1(%r2)
73 %ptr = getelementptr i8 *%src, i64 -1
75 %ext = zext i8 %byte to i32
79 ; Check the low end of the LLC range.
80 define i32 @f8(i8 *%src) {
82 ; CHECK: llc %r2, -524288(%r2)
84 %ptr = getelementptr i8 *%src, i64 -524288
86 %ext = zext i8 %byte to i32
90 ; Check the next byte down, which needs separate address logic.
91 ; Other sequences besides this one would be OK.
92 define i32 @f9(i8 *%src) {
94 ; CHECK: agfi %r2, -524289
95 ; CHECK: llc %r2, 0(%r2)
97 %ptr = getelementptr i8 *%src, i64 -524289
99 %ext = zext i8 %byte to i32
103 ; Check that LLC allows an index
104 define i32 @f10(i64 %src, i64 %index) {
106 ; CHECK: llc %r2, 524287(%r3,%r2)
108 %add1 = add i64 %src, %index
109 %add2 = add i64 %add1, 524287
110 %ptr = inttoptr i64 %add2 to i8 *
111 %byte = load i8 *%ptr
112 %ext = zext i8 %byte to i32