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comparison test/CodeGen/SystemZ/strcmp-02.ll @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
parents
children 1172e4bd9c6f
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-1:000000000000 0:95c75e76d11b
1 ; Test strcmp using CLST, i64 version.
2 ;
3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5 declare i64 @strcmp(i8 *%src1, i8 *%src2)
6
7 ; Check a case where the result is used as an integer.
8 define i64 @f1(i8 *%src1, i8 *%src2) {
9 ; CHECK-LABEL: f1:
10 ; CHECK: lhi %r0, 0
11 ; CHECK: [[LABEL:\.[^:]*]]:
12 ; CHECK: clst %r2, %r3
13 ; CHECK-NEXT: jo [[LABEL]]
14 ; CHECK-NEXT: BB#{{[0-9]+}}
15 ; CHECK-NEXT: ipm [[REG:%r[0-5]]]
16 ; CHECK: srl [[REG]], 28
17 ; CHECK: rll [[REG]], [[REG]], 31
18 ; CHECK: lgfr %r2, [[REG]]
19 ; CHECK: br %r14
20 %res = call i64 @strcmp(i8 *%src1, i8 *%src2)
21 ret i64 %res
22 }
23
24 ; Check a case where the result is tested for equality.
25 define void @f2(i8 *%src1, i8 *%src2, i64 *%dest) {
26 ; CHECK-LABEL: f2:
27 ; CHECK: lhi %r0, 0
28 ; CHECK: [[LABEL:\.[^:]*]]:
29 ; CHECK: clst %r2, %r3
30 ; CHECK-NEXT: jo [[LABEL]]
31 ; CHECK-NEXT: BB#{{[0-9]+}}
32 ; CHECK-NEXT: je {{\.L.*}}
33 ; CHECK: br %r14
34 %res = call i64 @strcmp(i8 *%src1, i8 *%src2)
35 %cmp = icmp eq i64 %res, 0
36 br i1 %cmp, label %exit, label %store
37
38 store:
39 store i64 0, i64 *%dest
40 br label %exit
41
42 exit:
43 ret void
44 }
45
46 ; Test a case where the result is used both as an integer and for
47 ; branching.
48 define i64 @f3(i8 *%src1, i8 *%src2, i64 *%dest) {
49 ; CHECK-LABEL: f3:
50 ; CHECK: lhi %r0, 0
51 ; CHECK: [[LABEL:\.[^:]*]]:
52 ; CHECK: clst %r2, %r3
53 ; CHECK-NEXT: jo [[LABEL]]
54 ; CHECK-NEXT: BB#{{[0-9]+}}
55 ; CHECK-NEXT: ipm [[REG:%r[0-5]]]
56 ; CHECK: srl [[REG]], 28
57 ; CHECK: rll [[REG]], [[REG]], 31
58 ; CHECK: lgfr %r2, [[REG]]
59 ; CHECK: jl {{\.L*}}
60 ; CHECK: br %r14
61 entry:
62 %res = call i64 @strcmp(i8 *%src1, i8 *%src2)
63 %cmp = icmp slt i64 %res, 0
64 br i1 %cmp, label %exit, label %store
65
66 store:
67 store i64 0, i64 *%dest
68 br label %exit
69
70 exit:
71 ret i64 %res
72 }