| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ;RUN: opt -instcombine -S %s | FileCheck %s |
| |
| define i8 @fast_div_201(i8 %p) { |
| ; CHECK-LABEL: @fast_div_201( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[V3:%.*]] = zext i8 [[P:%.*]] to i16 |
| ; CHECK-NEXT: [[V4:%.*]] = mul nuw nsw i16 [[V3]], 71 |
| ; CHECK-NEXT: [[V5:%.*]] = lshr i16 [[V4]], 8 |
| ; CHECK-NEXT: [[V6:%.*]] = trunc i16 [[V5]] to i8 |
| ; CHECK-NEXT: [[V7:%.*]] = sub i8 [[P]], [[V6]] |
| ; CHECK-NEXT: [[V8:%.*]] = lshr i8 [[V7]], 1 |
| ; CHECK-NEXT: [[V13:%.*]] = add nuw i8 [[V8]], [[V6]] |
| ; CHECK-NEXT: [[V14:%.*]] = lshr i8 [[V13]], 7 |
| ; CHECK-NEXT: ret i8 [[V14]] |
| ; |
| entry: |
| %v3 = zext i8 %p to i16 |
| %v4 = mul i16 %v3, 71 |
| %v5 = lshr i16 %v4, 8 |
| %v6 = trunc i16 %v5 to i8 |
| %v7 = sub i8 %p, %v6 |
| %v8 = lshr i8 %v7, 1 |
| %v13 = add i8 %v6, %v8 |
| %v14 = lshr i8 %v13, 7 |
| ret i8 %v14 |
| } |
