| ; RUN: opt -instcombine -o - -S %s | FileCheck %s |
| |
| ; The constant at %v35 should be shrunk, but this must lead to the nsw flag of |
| ; %v43 getting removed so that %v44 is not illegally optimized away. |
| ; CHECK-LABEL: @foo |
| ; CHECK: %v35 = add nuw nsw i32 %v34, 1362915575 |
| ; ... |
| ; CHECK: add nuw i32 %v42, 1533579450 |
| ; CHECK-NEXT: %v44 = or i32 %v43, -2147483648 |
| ; CHECK-NEXT: %v45 = xor i32 %v44, 749011377 |
| ; CHECK-NEXT: ret i32 %v45 |
| define i32 @foo(i32 %arg) { |
| %v33 = and i32 %arg, 223 |
| %v34 = xor i32 %v33, 29 |
| %v35 = add nuw i32 %v34, 3510399223 |
| %v37 = or i32 %v34, 1874836915 |
| %v38 = and i32 %v34, 221 |
| %v39 = xor i32 %v38, 1874836915 |
| %v40 = xor i32 %v37, %v39 |
| %v41 = shl nsw nuw i32 %v40, 1 |
| %v42 = sub i32 %v35, %v41 |
| %v43 = add nsw i32 %v42, 1533579450 |
| %v44 = or i32 %v43, -2147483648 |
| %v45 = xor i32 %v44, 749011377 |
| ret i32 %v45 |
| } |
