| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| ; Remove an icmp by using its operand in the subsequent logic directly. |
| |
| define i8 @zext_or_icmp_icmp(i8 %a, i8 %b) { |
| %mask = and i8 %a, 1 |
| %toBool1 = icmp eq i8 %mask, 0 |
| %toBool2 = icmp eq i8 %b, 0 |
| %bothCond = or i1 %toBool1, %toBool2 |
| %zext = zext i1 %bothCond to i8 |
| ret i8 %zext |
| |
| ; CHECK-LABEL: zext_or_icmp_icmp( |
| ; CHECK-NEXT: %mask = and i8 %a, 1 |
| ; CHECK-NEXT: %toBool2 = icmp eq i8 %b, 0 |
| ; CHECK-NEXT: %toBool22 = zext i1 %toBool2 to i8 |
| ; CHECK-NEXT: %1 = xor i8 %mask, 1 |
| ; CHECK-NEXT: %zext = or i8 %1, %toBool22 |
| ; CHECK-NEXT: ret i8 %zext |
| } |
| |