| ; 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 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 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 = global i32 0 |
| define 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 |
| } |