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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(loop-interchange),simplifycfg' -simplifycfg-require-and-preserve-domtree=1 \3; RUN: -pass-remarks=loop-interchange -pass-remarks-missed=loop-interchange -stats -S 2>&1 \4; RUN: | FileCheck -check-prefix=STATS %s5 6; no_deps_interchange just accesses a single nested array and can be interchange.7;8define i32 @no_deps_interchange(ptr nocapture %Arr) {9; STATS-LABEL: define i32 @no_deps_interchange(10; STATS-SAME: ptr captures(none) [[ARR:%.*]]) {11; STATS-NEXT: [[ENTRY:.*]]:12; STATS-NEXT: br label %[[FOR2:.*]]13; STATS: [[FOR1_HEADER:.*]]:14; STATS-NEXT: [[INDVARS_IV19:%.*]] = phi i64 [ [[INDVARS_IV_NEXT20:%.*]], %[[FOR1_HEADER]] ], [ 0, %[[FOR2]] ]15; STATS-NEXT: [[ARRAYIDX6:%.*]] = getelementptr inbounds [1024 x i32], ptr [[ARR]], i64 [[INDVARS_IV:%.*]], i64 [[INDVARS_IV19]]16; STATS-NEXT: store i32 0, ptr [[ARRAYIDX6]], align 417; STATS-NEXT: [[INDVARS_IV_NEXT:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 118; STATS-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], 102419; STATS-NEXT: [[INDVARS_IV_NEXT20]] = add nuw nsw i64 [[INDVARS_IV19]], 120; STATS-NEXT: [[EXITCOND21:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT20]], 102421; STATS-NEXT: br i1 [[EXITCOND21]], label %[[FOR1_HEADER]], label %[[FOR2_SPLIT:.*]]22; STATS: [[FOR2]]:23; STATS-NEXT: [[INDVARS_IV]] = phi i64 [ [[TMP0:%.*]], %[[FOR2_SPLIT]] ], [ 0, %[[ENTRY]] ]24; STATS-NEXT: br label %[[FOR1_HEADER]]25; STATS: [[FOR2_SPLIT]]:26; STATS-NEXT: [[TMP0]] = add nuw nsw i64 [[INDVARS_IV]], 127; STATS-NEXT: [[TMP1:%.*]] = icmp ne i64 [[TMP0]], 102428; STATS-NEXT: br i1 [[TMP1]], label %[[FOR2]], label %[[EXIT:.*]]29; STATS: [[EXIT]]:30; STATS-NEXT: ret i32 031;32entry:33 br label %for1.header34 35for1.header:36 %indvars.iv19 = phi i64 [ 0, %entry ], [ %indvars.iv.next20, %for1.inc ]37 br label %for238 39for2:40 %indvars.iv = phi i64 [ 0, %for1.header ], [ %indvars.iv.next, %for2 ]41 %arrayidx6 = getelementptr inbounds [1024 x i32], ptr %Arr, i64 %indvars.iv, i64 %indvars.iv1942 store i32 0, ptr %arrayidx6, align 443 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 144 %exitcond = icmp ne i64 %indvars.iv.next, 102445 br i1 %exitcond, label %for2, label %for1.inc46 47for1.inc:48 %indvars.iv.next20 = add nuw nsw i64 %indvars.iv19, 149 %exitcond21 = icmp ne i64 %indvars.iv.next20, 102450 br i1 %exitcond21, label %for1.header, label %exit51 52exit:53 ret i32 054 55}56 57; No memory access using any induction variables, interchanging not beneficial.58;59define i32 @no_mem_instrs(ptr %ptr) {60; STATS-LABEL: define i32 @no_mem_instrs(61; STATS-SAME: ptr [[PTR:%.*]]) {62; STATS-NEXT: [[ENTRY:.*]]:63; STATS-NEXT: br label %[[FOR1_HEADER:.*]]64; STATS: [[FOR1_HEADER]]:65; STATS-NEXT: [[INDVARS_IV19:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[INDVARS_IV_NEXT20:%.*]], %[[FOR1_INC:.*]] ]66; STATS-NEXT: br label %[[FOR2:.*]]67; STATS: [[FOR2]]:68; STATS-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[FOR1_HEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[FOR2]] ]69; STATS-NEXT: store i64 [[INDVARS_IV]], ptr [[PTR]], align 470; STATS-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 171; STATS-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], 102472; STATS-NEXT: br i1 [[EXITCOND]], label %[[FOR2]], label %[[FOR1_INC]]73; STATS: [[FOR1_INC]]:74; STATS-NEXT: [[INDVARS_IV_NEXT20]] = add nuw nsw i64 [[INDVARS_IV19]], 175; STATS-NEXT: [[EXITCOND21:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT20]], 102476; STATS-NEXT: br i1 [[EXITCOND21]], label %[[FOR1_HEADER]], label %[[EXIT:.*]]77; STATS: [[EXIT]]:78; STATS-NEXT: ret i32 079;80entry:81 br label %for1.header82 83for1.header:84 %indvars.iv19 = phi i64 [ 0, %entry ], [ %indvars.iv.next20, %for1.inc ]85 br label %for286 87for2:88 %indvars.iv = phi i64 [ 0, %for1.header ], [ %indvars.iv.next, %for2 ]89 store i64 %indvars.iv, ptr %ptr, align 490 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 191 %exitcond = icmp ne i64 %indvars.iv.next, 102492 br i1 %exitcond, label %for2, label %for1.inc93 94for1.inc:95 %indvars.iv.next20 = add nuw nsw i64 %indvars.iv19, 196 %exitcond21 = icmp ne i64 %indvars.iv.next20, 102497 br i1 %exitcond21, label %for1.header, label %exit98 99exit: ; preds = %for1.inc100 ret i32 0101}102