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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 52; RUN: opt < %s -passes=loop-interchange -S -verify-dom-info -verify-loop-info 2>&1 | FileCheck %s3 4target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"5 6@A = common global [100 x [100 x i32]] zeroinitializer7 8declare void @foo(i64 %a)9declare void @bar(i64 %a) readnone10 11;;--------------------------------------Test case 02------------------------------------12;; Safe to interchange, because the called function `bar` is marked as readnone,13;; so it cannot introduce dependences.14;;15;; for(int i=0;i<100;i++) {16;; for(int j=1;j<100;j++) {17;; bar(i);18;; A[j][i] = A[j][i]+k;19;; }20;; }21;22define void @interchange_02(i32 %k) {23; CHECK-LABEL: define void @interchange_02(24; CHECK-SAME: i32 [[K:%.*]]) {25; CHECK-NEXT: [[ENTRY:.*:]]26; CHECK-NEXT: br label %[[FOR2_PREHEADER:.*]]27; CHECK: [[FOR1_HEADER_PREHEADER:.*]]:28; CHECK-NEXT: br label %[[FOR1_HEADER:.*]]29; CHECK: [[FOR1_HEADER]]:30; CHECK-NEXT: [[INDVARS_IV23:%.*]] = phi i64 [ [[INDVARS_IV_NEXT24:%.*]], %[[FOR1_INC10:.*]] ], [ 0, %[[FOR1_HEADER_PREHEADER]] ]31; CHECK-NEXT: br label %[[FOR2_SPLIT1:.*]]32; CHECK: [[FOR2_PREHEADER]]:33; CHECK-NEXT: br label %[[FOR2:.*]]34; CHECK: [[FOR2]]:35; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[TMP0:%.*]], %[[FOR2_SPLIT:.*]] ], [ 1, %[[FOR2_PREHEADER]] ]36; CHECK-NEXT: br label %[[FOR1_HEADER_PREHEADER]]37; CHECK: [[FOR2_SPLIT1]]:38; CHECK-NEXT: call void @bar(i64 [[INDVARS_IV23]])39; CHECK-NEXT: [[ARRAYIDX5:%.*]] = getelementptr inbounds [100 x [100 x i32]], ptr @A, i64 0, i64 [[INDVARS_IV]], i64 [[INDVARS_IV23]]40; CHECK-NEXT: [[LV:%.*]] = load i32, ptr [[ARRAYIDX5]], align 441; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[LV]], [[K]]42; CHECK-NEXT: store i32 [[ADD]], ptr [[ARRAYIDX5]], align 443; CHECK-NEXT: [[INDVARS_IV_NEXT:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 144; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV]], 9945; CHECK-NEXT: br label %[[FOR2_LOOPEXIT:.*]]46; CHECK: [[FOR2_SPLIT]]:47; CHECK-NEXT: [[TMP0]] = add nuw nsw i64 [[INDVARS_IV]], 148; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i64 [[INDVARS_IV]], 9949; CHECK-NEXT: br i1 [[TMP1]], label %[[FOR1_LOOPEXIT:.*]], label %[[FOR2]]50; CHECK: [[FOR2_LOOPEXIT]]:51; CHECK-NEXT: br label %[[FOR1_INC10]]52; CHECK: [[FOR1_INC10]]:53; CHECK-NEXT: [[INDVARS_IV_NEXT24]] = add nuw nsw i64 [[INDVARS_IV23]], 154; CHECK-NEXT: [[EXITCOND26:%.*]] = icmp eq i64 [[INDVARS_IV23]], 9955; CHECK-NEXT: br i1 [[EXITCOND26]], label %[[FOR2_SPLIT]], label %[[FOR1_HEADER]]56; CHECK: [[FOR1_LOOPEXIT]]:57; CHECK-NEXT: br label %[[EXIT:.*]]58; CHECK: [[EXIT]]:59; CHECK-NEXT: ret void60;61entry:62 br label %for1.header63 64for1.header:65 %indvars.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for1.inc10 ]66 br label %for267 68for2:69 %indvars.iv = phi i64 [ %indvars.iv.next, %for2 ], [ 1, %for1.header ]70 call void @bar(i64 %indvars.iv23)71 %arrayidx5 = getelementptr inbounds [100 x [100 x i32]], ptr @A, i64 0, i64 %indvars.iv, i64 %indvars.iv2372 %lv = load i32, ptr %arrayidx573 %add = add nsw i32 %lv, %k74 store i32 %add, ptr %arrayidx575 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 176 %exitcond = icmp eq i64 %indvars.iv, 9977 br i1 %exitcond, label %for2.loopexit , label %for278 79for2.loopexit:80 br label %for1.inc1081 82for1.inc10:83 %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 184 %exitcond26 = icmp eq i64 %indvars.iv23, 9985 br i1 %exitcond26, label %for1.loopexit, label %for1.header86 87for1.loopexit:88 br label %exit89 90exit:91 ret void92}93