1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5 2; RUN: opt < %s -passes=loop-interchange -S -verify-dom-info -verify-loop-info 2>&1 | FileCheck %s 3 4target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 5 6@A = common global [100 x [100 x i32]] zeroinitializer 7 8declare void @foo(i64 %a) 9declare void @bar(i64 %a) readnone 10 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 4 41; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[LV]], [[K]] 42; CHECK-NEXT: store i32 [[ADD]], ptr [[ARRAYIDX5]], align 4 43; CHECK-NEXT: [[INDVARS_IV_NEXT:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 1 44; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV]], 99 45; CHECK-NEXT: br label %[[FOR2_LOOPEXIT:.*]] 46; CHECK: [[FOR2_SPLIT]]: 47; CHECK-NEXT: [[TMP0]] = add nuw nsw i64 [[INDVARS_IV]], 1 48; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i64 [[INDVARS_IV]], 99 49; 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]], 1 54; CHECK-NEXT: [[EXITCOND26:%.*]] = icmp eq i64 [[INDVARS_IV23]], 99 55; 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 void 60; 61entry: 62 br label %for1.header 63 64for1.header: 65 %indvars.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for1.inc10 ] 66 br label %for2 67 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.iv23 72 %lv = load i32, ptr %arrayidx5 73 %add = add nsw i32 %lv, %k 74 store i32 %add, ptr %arrayidx5 75 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 76 %exitcond = icmp eq i64 %indvars.iv, 99 77 br i1 %exitcond, label %for2.loopexit , label %for2 78 79for2.loopexit: 80 br label %for1.inc10 81 82for1.inc10: 83 %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1 84 %exitcond26 = icmp eq i64 %indvars.iv23, 99 85 br i1 %exitcond26, label %for1.loopexit, label %for1.header 86 87for1.loopexit: 88 br label %exit 89 90exit: 91 ret void 92} 93