1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -debugify -loop-idiom -mtriple=x86_64 -mcpu=core-avx2 < %s -S | FileCheck %s 3 4declare void @escape_inner(i8, i8, i8, i1, i8) 5declare void @escape_outer(i8, i8, i8, i1, i8) 6 7define i8 @p(i8 %val, i8 %start, i8 %extraoffset) { 8; CHECK-LABEL: @p( 9; CHECK-NEXT: entry: 10; CHECK-NEXT: [[VAL_NUMLEADINGZEROS:%.*]] = call i8 @llvm.ctlz.i8(i8 [[VAL:%.*]], i1 false), !dbg [[DBG20:![0-9]+]] 11; CHECK-NEXT: [[VAL_NUMACTIVEBITS:%.*]] = sub nuw nsw i8 8, [[VAL_NUMLEADINGZEROS]], !dbg [[DBG20]] 12; CHECK-NEXT: [[TMP0:%.*]] = sub i8 0, [[EXTRAOFFSET:%.*]], !dbg [[DBG21:![0-9]+]] 13; CHECK-NEXT: [[VAL_NUMACTIVEBITS_OFFSET:%.*]] = add nsw i8 [[VAL_NUMACTIVEBITS]], [[TMP0]], !dbg [[DBG20]] 14; CHECK-NEXT: [[IV_FINAL:%.*]] = call i8 @llvm.smax.i8(i8 [[VAL_NUMACTIVEBITS_OFFSET]], i8 [[START:%.*]]), !dbg [[DBG20]] 15; CHECK-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nsw i8 [[IV_FINAL]], [[START]], !dbg [[DBG20]] 16; CHECK-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i8 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG20]] 17; CHECK-NEXT: br label [[LOOP:%.*]], !dbg [[DBG21]] 18; CHECK: loop: 19; CHECK-NEXT: [[LOOP_IV:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG20]] 20; CHECK-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i8 [[LOOP_IV]], 1, !dbg [[DBG20]] 21; CHECK-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i8 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG20]] 22; CHECK-NEXT: [[IV:%.*]] = add nsw i8 [[LOOP_IV]], [[START]], !dbg [[DBG20]] 23; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[IV]], metadata [[META9:![0-9]+]], metadata !DIExpression()), !dbg [[DBG20]] 24; CHECK-NEXT: [[NBITS:%.*]] = add nsw i8 [[IV]], [[EXTRAOFFSET]], !dbg [[DBG22:![0-9]+]] 25; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[NBITS]], metadata [[META11:![0-9]+]], metadata !DIExpression()), !dbg [[DBG22]] 26; CHECK-NEXT: [[VAL_SHIFTED:%.*]] = lshr i8 [[VAL]], [[NBITS]], !dbg [[DBG23:![0-9]+]] 27; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[VAL_SHIFTED]], metadata [[META12:![0-9]+]], metadata !DIExpression()), !dbg [[DBG23]] 28; CHECK-NEXT: call void @llvm.dbg.value(metadata i1 [[LOOP_IVCHECK]], metadata [[META13:![0-9]+]], metadata !DIExpression()), !dbg [[DBG24:![0-9]+]] 29; CHECK-NEXT: [[IV_NEXT:%.*]] = add i8 [[IV]], 1, !dbg [[DBG25:![0-9]+]] 30; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[IV_NEXT]], metadata [[META14:![0-9]+]], metadata !DIExpression()), !dbg [[DBG25]] 31; CHECK-NEXT: call void @escape_inner(i8 [[IV]], i8 [[NBITS]], i8 [[VAL_SHIFTED]], i1 [[LOOP_IVCHECK]], i8 [[IV_NEXT]]), !dbg [[DBG26:![0-9]+]] 32; CHECK-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG27:![0-9]+]] 33; CHECK: end: 34; CHECK-NEXT: [[IV_RES:%.*]] = phi i8 [ [[IV_FINAL]], [[LOOP]] ], !dbg [[DBG28:![0-9]+]] 35; CHECK-NEXT: [[NBITS_RES:%.*]] = phi i8 [ [[NBITS]], [[LOOP]] ], !dbg [[DBG29:![0-9]+]] 36; CHECK-NEXT: [[VAL_SHIFTED_RES:%.*]] = phi i8 [ [[VAL_SHIFTED]], [[LOOP]] ], !dbg [[DBG30:![0-9]+]] 37; CHECK-NEXT: [[VAL_SHIFTED_ISZERO_RES:%.*]] = phi i1 [ [[LOOP_IVCHECK]], [[LOOP]] ], !dbg [[DBG31:![0-9]+]] 38; CHECK-NEXT: [[IV_NEXT_RES:%.*]] = phi i8 [ [[IV_NEXT]], [[LOOP]] ], !dbg [[DBG32:![0-9]+]] 39; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[IV_RES]], metadata [[META15:![0-9]+]], metadata !DIExpression()), !dbg [[DBG28]] 40; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[NBITS_RES]], metadata [[META16:![0-9]+]], metadata !DIExpression()), !dbg [[DBG29]] 41; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[VAL_SHIFTED_RES]], metadata [[META17:![0-9]+]], metadata !DIExpression()), !dbg [[DBG30]] 42; CHECK-NEXT: call void @llvm.dbg.value(metadata i1 [[VAL_SHIFTED_ISZERO_RES]], metadata [[META18:![0-9]+]], metadata !DIExpression()), !dbg [[DBG31]] 43; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[IV_NEXT_RES]], metadata [[META19:![0-9]+]], metadata !DIExpression()), !dbg [[DBG32]] 44; 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]]), !dbg [[DBG33:![0-9]+]] 45; CHECK-NEXT: ret i8 [[IV_RES]], !dbg [[DBG34:![0-9]+]] 46; 47entry: 48 br label %loop 49 50loop: 51 %iv = phi i8 [ %start, %entry ], [ %iv.next, %loop ] 52 %nbits = add nsw i8 %iv, %extraoffset 53 %val.shifted = lshr i8 %val, %nbits 54 %val.shifted.iszero = icmp eq i8 %val.shifted, 0 55 %iv.next = add i8 %iv, 1 56 57 call void @escape_inner(i8 %iv, i8 %nbits, i8 %val.shifted, i1 %val.shifted.iszero, i8 %iv.next) 58 59 br i1 %val.shifted.iszero, label %end, label %loop 60 61end: 62 %iv.res = phi i8 [ %iv, %loop ] 63 %nbits.res = phi i8 [ %nbits, %loop ] 64 %val.shifted.res = phi i8 [ %val.shifted, %loop ] 65 %val.shifted.iszero.res = phi i1 [ %val.shifted.iszero, %loop ] 66 %iv.next.res = phi i8 [ %iv.next, %loop ] 67 68 call void @escape_outer(i8 %iv.res, i8 %nbits.res, i8 %val.shifted.res, i1 %val.shifted.iszero.res, i8 %iv.next.res) 69 70 ret i8 %iv.res 71} 72