1 ; Test sign extensions from a byte to an i64.
3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
5 ; Test register extension, starting with an i32.
6 define i64 @f1(i32 %a) {
10 %byte = trunc i32 %a to i8
11 %ext = sext i8 %byte to i64
15 ; ...and again with an i64.
16 define i64 @f2(i64 %a) {
18 ; CHECK: lgbr %r2, %r2
20 %byte = trunc i64 %a to i8
21 %ext = sext i8 %byte to i64
25 ; Check LGB with no displacement.
26 define i64 @f3(i8 *%src) {
28 ; CHECK: lgb %r2, 0(%r2)
31 %ext = sext i8 %byte to i64
35 ; Check the high end of the LGB range.
36 define i64 @f4(i8 *%src) {
38 ; CHECK: lgb %r2, 524287(%r2)
40 %ptr = getelementptr i8 *%src, i64 524287
42 %ext = sext i8 %byte to i64
46 ; Check the next byte up, which needs separate address logic.
47 ; Other sequences besides this one would be OK.
48 define i64 @f5(i8 *%src) {
50 ; CHECK: agfi %r2, 524288
51 ; CHECK: lgb %r2, 0(%r2)
53 %ptr = getelementptr i8 *%src, i64 524288
55 %ext = sext i8 %byte to i64
59 ; Check the high end of the negative LGB range.
60 define i64 @f6(i8 *%src) {
62 ; CHECK: lgb %r2, -1(%r2)
64 %ptr = getelementptr i8 *%src, i64 -1
66 %ext = sext i8 %byte to i64
70 ; Check the low end of the LGB range.
71 define i64 @f7(i8 *%src) {
73 ; CHECK: lgb %r2, -524288(%r2)
75 %ptr = getelementptr i8 *%src, i64 -524288
77 %ext = sext i8 %byte to i64
81 ; Check the next byte down, which needs separate address logic.
82 ; Other sequences besides this one would be OK.
83 define i64 @f8(i8 *%src) {
85 ; CHECK: agfi %r2, -524289
86 ; CHECK: lgb %r2, 0(%r2)
88 %ptr = getelementptr i8 *%src, i64 -524289
90 %ext = sext i8 %byte to i64
94 ; Check that LGB allows an index
95 define i64 @f9(i64 %src, i64 %index) {
97 ; CHECK: lgb %r2, 524287(%r3,%r2)
99 %add1 = add i64 %src, %index
100 %add2 = add i64 %add1, 524287
101 %ptr = inttoptr i64 %add2 to i8 *
102 %byte = load i8 *%ptr
103 %ext = sext i8 %byte to i64