1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc -o - %s | FileCheck %s
3 target triple = "x86_64-unknown-unknown"
5 ; select with and i1/or i1 condition should be implemented as a series of 2
6 ; cmovs, not by producing two conditions and using and on them.
8 define i32 @select_and(i32 %a0, i32 %a1, float %a2, float %a3, i32 %a4, i32 %a5) {
9 ; CHECK-LABEL: select_and:
11 ; CHECK-NEXT: movl %edx, %eax
12 ; CHECK-NEXT: ucomiss %xmm0, %xmm1
13 ; CHECK-NEXT: cmovbel %ecx, %eax
14 ; CHECK-NEXT: cmpl %esi, %edi
15 ; CHECK-NEXT: cmovael %ecx, %eax
17 %cmp0 = icmp ult i32 %a0, %a1
18 %cmp1 = fcmp olt float %a2, %a3
19 %and = and i1 %cmp0, %cmp1
20 %res = select i1 %and, i32 %a4, i32 %a5
24 ; select with and i1 condition should be implemented as a series of 2 cmovs, not
25 ; by producing two conditions and using and on them.
27 define i32 @select_or(i32 %a0, i32 %a1, float %a2, float %a3, i32 %a4, i32 %a5) {
28 ; CHECK-LABEL: select_or:
30 ; CHECK-NEXT: movl %ecx, %eax
31 ; CHECK-NEXT: ucomiss %xmm0, %xmm1
32 ; CHECK-NEXT: cmoval %edx, %eax
33 ; CHECK-NEXT: cmpl %esi, %edi
34 ; CHECK-NEXT: cmovbl %edx, %eax
36 %cmp0 = icmp ult i32 %a0, %a1
37 %cmp1 = fcmp olt float %a2, %a3
38 %and = or i1 %cmp0, %cmp1
39 %res = select i1 %and, i32 %a4, i32 %a5
43 ; If one of the conditions is materialized as a 0/1 value anyway, then the
44 ; sequence of 2 cmovs should not be used.
47 define i32 @select_noopt(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4) {
48 ; CHECK-LABEL: select_noopt:
50 ; CHECK-NEXT: movl %ecx, %eax
51 ; CHECK-NEXT: cmpl %esi, %edi
52 ; CHECK-NEXT: setb %cl
53 ; CHECK-NEXT: cmpl %edx, %esi
54 ; CHECK-NEXT: setb %dl
55 ; CHECK-NEXT: orb %cl, %dl
56 ; CHECK-NEXT: movzbl %dl, %ecx
57 ; CHECK-NEXT: movl %ecx, {{.*}}(%rip)
58 ; CHECK-NEXT: testb %cl, %cl
59 ; CHECK-NEXT: cmovel %r8d, %eax
61 %cmp0 = icmp ult i32 %a0, %a1
62 %cmp1 = icmp ult i32 %a1, %a2
63 %or = or i1 %cmp0, %cmp1
64 %zero_one = zext i1 %or to i32
65 store volatile i32 %zero_one, i32* @var32
66 %res = select i1 %or, i32 %a3, i32 %a4