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1; RUN: llc -o - %s | FileCheck %s
2target triple = "arm-unknown-unknown"
3
4; select with and i1/or i1 condition should be implemented as a series of 2
5; cmovs, not by producing two conditions and using and on them.
6
7define i32 @select_and(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5) {
8; CHECK-LABEL: select_and
9; CHECK-NOT: tst
10; CHECK-NOT: movne
11; CHECK: mov{{lo|hs}}
12; CHECK: mov{{lo|hs}}
13  %cmp0 = icmp ult i32 %a0, %a1
14  %cmp1 = icmp ult i32 %a2, %a3
15  %and = and i1 %cmp0, %cmp1
16  %res = select i1 %and, i32 %a4, i32 %a5
17  ret i32 %res
18}
19
20define i32 @select_or(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5) {
21; select with and i1 condition should be implemented as a series of 2 cmovs, not
22; by producing two conditions and using and on them.
23; CHECK-LABEL: select_or
24; CHECK-NOT: orss
25; CHECK-NOT: tst
26; CHECK: mov{{lo|hs}}
27; CHECK: mov{{lo|hs}}
28  %cmp0 = icmp ult i32 %a0, %a1
29  %cmp1 = icmp ult i32 %a2, %a3
30  %and = or i1 %cmp0, %cmp1
31  %res = select i1 %and, i32 %a4, i32 %a5
32  ret i32 %res
33}
34
35; If one of the conditions is materialized as a 0/1 value anyway, then the
36; sequence of 2 cmovs should not be used.
37
38@var32 = global i32 0
39define i32 @select_noopt(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4) {
40; CHECK-LABEL: select_noopt
41; CHECK: orrs
42; CHECK: movne
43  %cmp0 = icmp ult i32 %a0, %a1
44  %cmp1 = icmp ult i32 %a1, %a2
45  %or = or i1 %cmp0, %cmp1
46  %zero_one = zext i1 %or to i32
47  store volatile i32 %zero_one, i32* @var32
48  %res = select i1 %or, i32 %a3, i32 %a4
49  ret i32 %res
50}
51