1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc -o - %s | FileCheck %s 3target triple = "x86_64-unknown-unknown" 4 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. 7 8define i32 @select_and(i32 %a0, i32 %a1, float %a2, float %a3, i32 %a4, i32 %a5) { 9; CHECK-LABEL: select_and: 10; CHECK: # %bb.0: 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 16; CHECK-NEXT: retq 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 21 ret i32 %res 22} 23 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. 26 27define i32 @select_or(i32 %a0, i32 %a1, float %a2, float %a3, i32 %a4, i32 %a5) { 28; CHECK-LABEL: select_or: 29; CHECK: # %bb.0: 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 35; CHECK-NEXT: retq 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 40 ret i32 %res 41} 42 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. 45 46@var32 = global i32 0 47define i32 @select_noopt(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4) { 48; CHECK-LABEL: select_noopt: 49; CHECK: # %bb.0: 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 60; CHECK-NEXT: retq 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 67 ret i32 %res 68} 69