; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py ; RUN: llc -o - %s | FileCheck %s target triple = "x86_64-unknown-unknown" ; select with and i1/or i1 condition should be implemented as a series of 2 ; cmovs, not by producing two conditions and using and on them. define dso_local i32 @select_and(i32 %a0, i32 %a1, float %a2, float %a3, i32 %a4, i32 %a5) { ; CHECK-LABEL: select_and: ; CHECK: # %bb.0: ; CHECK-NEXT: movl %edx, %eax ; CHECK-NEXT: ucomiss %xmm0, %xmm1 ; CHECK-NEXT: cmovbel %ecx, %eax ; CHECK-NEXT: cmpl %esi, %edi ; CHECK-NEXT: cmovael %ecx, %eax ; CHECK-NEXT: retq %cmp0 = icmp ult i32 %a0, %a1 %cmp1 = fcmp olt float %a2, %a3 %and = and i1 %cmp0, %cmp1 %res = select i1 %and, i32 %a4, i32 %a5 ret i32 %res } ; select with and i1 condition should be implemented as a series of 2 cmovs, not ; by producing two conditions and using and on them. define dso_local i32 @select_or(i32 %a0, i32 %a1, float %a2, float %a3, i32 %a4, i32 %a5) { ; CHECK-LABEL: select_or: ; CHECK: # %bb.0: ; CHECK-NEXT: movl %ecx, %eax ; CHECK-NEXT: ucomiss %xmm0, %xmm1 ; CHECK-NEXT: cmoval %edx, %eax ; CHECK-NEXT: cmpl %esi, %edi ; CHECK-NEXT: cmovbl %edx, %eax ; CHECK-NEXT: retq %cmp0 = icmp ult i32 %a0, %a1 %cmp1 = fcmp olt float %a2, %a3 %and = or i1 %cmp0, %cmp1 %res = select i1 %and, i32 %a4, i32 %a5 ret i32 %res } ; If one of the conditions is materialized as a 0/1 value anyway, then the ; sequence of 2 cmovs should not be used. @var32 = dso_local global i32 0 define dso_local i32 @select_noopt(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4) { ; CHECK-LABEL: select_noopt: ; CHECK: # %bb.0: ; CHECK-NEXT: movl %ecx, %eax ; CHECK-NEXT: cmpl %esi, %edi ; CHECK-NEXT: setb %cl ; CHECK-NEXT: cmpl %edx, %esi ; CHECK-NEXT: setb %dl ; CHECK-NEXT: orb %cl, %dl ; CHECK-NEXT: movzbl %dl, %ecx ; CHECK-NEXT: movl %ecx, {{.*}}(%rip) ; CHECK-NEXT: testb %cl, %cl ; CHECK-NEXT: cmovel %r8d, %eax ; CHECK-NEXT: retq %cmp0 = icmp ult i32 %a0, %a1 %cmp1 = icmp ult i32 %a1, %a2 %or = or i1 %cmp0, %cmp1 %zero_one = zext i1 %or to i32 store volatile i32 %zero_one, i32* @var32 %res = select i1 %or, i32 %a3, i32 %a4 ret i32 %res }