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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -passes=loop-idiom -mtriple=x86_64 -mcpu=corei7 < %s -S | FileCheck %s3 4declare void @escape_inner(i8, i8, i8, i1, i8)5declare void @escape_outer(i8, i8, i8, i1, i8)6 7; On corei7, lzcount is not cheap, so we don't transform.8define i8 @n(i8 %val, i8 %start, i8 %extraoffset) {9; CHECK-LABEL: @n(10; CHECK-NEXT: entry:11; CHECK-NEXT: br label [[LOOP:%.*]]12; CHECK: loop:13; CHECK-NEXT: [[IV:%.*]] = phi i8 [ [[START:%.*]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]14; CHECK-NEXT: [[NBITS:%.*]] = add nsw i8 [[IV]], [[EXTRAOFFSET:%.*]]15; CHECK-NEXT: [[VAL_SHIFTED:%.*]] = lshr i8 [[VAL:%.*]], [[NBITS]]16; CHECK-NEXT: [[VAL_SHIFTED_ISZERO:%.*]] = icmp eq i8 [[VAL_SHIFTED]], 017; CHECK-NEXT: [[IV_NEXT]] = add i8 [[IV]], 118; CHECK-NEXT: call void @escape_inner(i8 [[IV]], i8 [[NBITS]], i8 [[VAL_SHIFTED]], i1 [[VAL_SHIFTED_ISZERO]], i8 [[IV_NEXT]])19; CHECK-NEXT: br i1 [[VAL_SHIFTED_ISZERO]], label [[END:%.*]], label [[LOOP]]20; CHECK: end:21; CHECK-NEXT: [[IV_RES:%.*]] = phi i8 [ [[IV]], [[LOOP]] ]22; CHECK-NEXT: [[NBITS_RES:%.*]] = phi i8 [ [[NBITS]], [[LOOP]] ]23; CHECK-NEXT: [[VAL_SHIFTED_RES:%.*]] = phi i8 [ [[VAL_SHIFTED]], [[LOOP]] ]24; CHECK-NEXT: [[VAL_SHIFTED_ISZERO_RES:%.*]] = phi i1 [ [[VAL_SHIFTED_ISZERO]], [[LOOP]] ]25; CHECK-NEXT: [[IV_NEXT_RES:%.*]] = phi i8 [ [[IV_NEXT]], [[LOOP]] ]26; 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]])27; CHECK-NEXT: ret i8 [[IV_RES]]28;29entry:30 br label %loop31 32loop:33 %iv = phi i8 [ %start, %entry ], [ %iv.next, %loop ]34 %nbits = add nsw i8 %iv, %extraoffset35 %val.shifted = lshr i8 %val, %nbits36 %val.shifted.iszero = icmp eq i8 %val.shifted, 037 %iv.next = add i8 %iv, 138 39 call void @escape_inner(i8 %iv, i8 %nbits, i8 %val.shifted, i1 %val.shifted.iszero, i8 %iv.next)40 41 br i1 %val.shifted.iszero, label %end, label %loop42 43end:44 %iv.res = phi i8 [ %iv, %loop ]45 %nbits.res = phi i8 [ %nbits, %loop ]46 %val.shifted.res = phi i8 [ %val.shifted, %loop ]47 %val.shifted.iszero.res = phi i1 [ %val.shifted.iszero, %loop ]48 %iv.next.res = phi i8 [ %iv.next, %loop ]49 50 call void @escape_outer(i8 %iv.res, i8 %nbits.res, i8 %val.shifted.res, i1 %val.shifted.iszero.res, i8 %iv.next.res)51 52 ret i8 %iv.res53}54