1 ; Test sign extensions from a halfword 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 %half = trunc i32 %a to i16
11 %ext = sext i16 %half to i32
15 ; ...and again with an i64.
16 define i32 @f2(i64 %a) {
20 %half = trunc i64 %a to i16
21 %ext = sext i16 %half to i32
25 ; Check the low end of the LH range.
26 define i32 @f3(i16 *%src) {
28 ; CHECK: lh %r2, 0(%r2)
30 %half = load i16 *%src
31 %ext = sext i16 %half to i32
35 ; Check the high end of the LH range.
36 define i32 @f4(i16 *%src) {
38 ; CHECK: lh %r2, 4094(%r2)
40 %ptr = getelementptr i16 *%src, i64 2047
41 %half = load i16 *%ptr
42 %ext = sext i16 %half to i32
46 ; Check the next halfword up, which needs LHY rather than LH.
47 define i32 @f5(i16 *%src) {
49 ; CHECK: lhy %r2, 4096(%r2)
51 %ptr = getelementptr i16 *%src, i64 2048
52 %half = load i16 *%ptr
53 %ext = sext i16 %half to i32
57 ; Check the high end of the LHY range.
58 define i32 @f6(i16 *%src) {
60 ; CHECK: lhy %r2, 524286(%r2)
62 %ptr = getelementptr i16 *%src, i64 262143
63 %half = load i16 *%ptr
64 %ext = sext i16 %half to i32
68 ; Check the next halfword up, which needs separate address logic.
69 ; Other sequences besides this one would be OK.
70 define i32 @f7(i16 *%src) {
72 ; CHECK: agfi %r2, 524288
73 ; CHECK: lh %r2, 0(%r2)
75 %ptr = getelementptr i16 *%src, i64 262144
76 %half = load i16 *%ptr
77 %ext = sext i16 %half to i32
81 ; Check the high end of the negative LHY range.
82 define i32 @f8(i16 *%src) {
84 ; CHECK: lhy %r2, -2(%r2)
86 %ptr = getelementptr i16 *%src, i64 -1
87 %half = load i16 *%ptr
88 %ext = sext i16 %half to i32
92 ; Check the low end of the LHY range.
93 define i32 @f9(i16 *%src) {
95 ; CHECK: lhy %r2, -524288(%r2)
97 %ptr = getelementptr i16 *%src, i64 -262144
98 %half = load i16 *%ptr
99 %ext = sext i16 %half to i32
103 ; Check the next halfword down, which needs separate address logic.
104 ; Other sequences besides this one would be OK.
105 define i32 @f10(i16 *%src) {
107 ; CHECK: agfi %r2, -524290
108 ; CHECK: lh %r2, 0(%r2)
110 %ptr = getelementptr i16 *%src, i64 -262145
111 %half = load i16 *%ptr
112 %ext = sext i16 %half to i32
116 ; Check that LH allows an index
117 define i32 @f11(i64 %src, i64 %index) {
119 ; CHECK: lh %r2, 4094(%r3,%r2)
121 %add1 = add i64 %src, %index
122 %add2 = add i64 %add1, 4094
123 %ptr = inttoptr i64 %add2 to i16 *
124 %half = load i16 *%ptr
125 %ext = sext i16 %half to i32
129 ; Check that LH allows an index
130 define i32 @f12(i64 %src, i64 %index) {
132 ; CHECK: lhy %r2, 4096(%r3,%r2)
134 %add1 = add i64 %src, %index
135 %add2 = add i64 %add1, 4096
136 %ptr = inttoptr i64 %add2 to i16 *
137 %half = load i16 *%ptr
138 %ext = sext i16 %half to i32