| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -loop-idiom -mtriple=x86_64 -mcpu=corei7 < %s -S | FileCheck %s |
| |
| declare void @escape_inner(i8, i8, i8, i1, i8) |
| declare void @escape_outer(i8, i8, i8, i1, i8) |
| |
| ; On corei7, lzcount is not cheap, so we don't transform. |
| define i8 @n(i8 %val, i8 %start, i8 %extraoffset) { |
| ; CHECK-LABEL: @n( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[LOOP:%.*]] |
| ; CHECK: loop: |
| ; CHECK-NEXT: [[IV:%.*]] = phi i8 [ [[START:%.*]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[NBITS:%.*]] = add nsw i8 [[IV]], [[EXTRAOFFSET:%.*]] |
| ; CHECK-NEXT: [[VAL_SHIFTED:%.*]] = lshr i8 [[VAL:%.*]], [[NBITS]] |
| ; CHECK-NEXT: [[VAL_SHIFTED_ISZERO:%.*]] = icmp eq i8 [[VAL_SHIFTED]], 0 |
| ; CHECK-NEXT: [[IV_NEXT]] = add i8 [[IV]], 1 |
| ; CHECK-NEXT: call void @escape_inner(i8 [[IV]], i8 [[NBITS]], i8 [[VAL_SHIFTED]], i1 [[VAL_SHIFTED_ISZERO]], i8 [[IV_NEXT]]) |
| ; CHECK-NEXT: br i1 [[VAL_SHIFTED_ISZERO]], label [[END:%.*]], label [[LOOP]] |
| ; CHECK: end: |
| ; CHECK-NEXT: [[IV_RES:%.*]] = phi i8 [ [[IV]], [[LOOP]] ] |
| ; CHECK-NEXT: [[NBITS_RES:%.*]] = phi i8 [ [[NBITS]], [[LOOP]] ] |
| ; CHECK-NEXT: [[VAL_SHIFTED_RES:%.*]] = phi i8 [ [[VAL_SHIFTED]], [[LOOP]] ] |
| ; CHECK-NEXT: [[VAL_SHIFTED_ISZERO_RES:%.*]] = phi i1 [ [[VAL_SHIFTED_ISZERO]], [[LOOP]] ] |
| ; CHECK-NEXT: [[IV_NEXT_RES:%.*]] = phi i8 [ [[IV_NEXT]], [[LOOP]] ] |
| ; CHECK-NEXT: call void @escape_outer(i8 [[IV_RES]], i8 [[NBITS_RES]], i8 [[VAL_SHIFTED_RES]], i1 [[VAL_SHIFTED_ISZERO_RES]], i8 [[IV_NEXT_RES]]) |
| ; CHECK-NEXT: ret i8 [[IV_RES]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %iv = phi i8 [ %start, %entry ], [ %iv.next, %loop ] |
| %nbits = add nsw i8 %iv, %extraoffset |
| %val.shifted = lshr i8 %val, %nbits |
| %val.shifted.iszero = icmp eq i8 %val.shifted, 0 |
| %iv.next = add i8 %iv, 1 |
| |
| call void @escape_inner(i8 %iv, i8 %nbits, i8 %val.shifted, i1 %val.shifted.iszero, i8 %iv.next) |
| |
| br i1 %val.shifted.iszero, label %end, label %loop |
| |
| end: |
| %iv.res = phi i8 [ %iv, %loop ] |
| %nbits.res = phi i8 [ %nbits, %loop ] |
| %val.shifted.res = phi i8 [ %val.shifted, %loop ] |
| %val.shifted.iszero.res = phi i1 [ %val.shifted.iszero, %loop ] |
| %iv.next.res = phi i8 [ %iv.next, %loop ] |
| |
| call void @escape_outer(i8 %iv.res, i8 %nbits.res, i8 %val.shifted.res, i1 %val.shifted.iszero.res, i8 %iv.next.res) |
| |
| ret i8 %iv.res |
| } |