1; RUN: opt < %s -O1 -S -loop-versioning-licm -licm -debug-only=loop-versioning-licm -enable-new-pm=0 2>&1 | FileCheck %s 2; RUN: opt < %s -S -passes='default<O1>,loop-versioning-licm,licm' --aa-pipeline=default -debug-only=loop-versioning-licm 2>&1 | FileCheck %s 3; REQUIRES: asserts 4; 5; Test to confirm loop is a candidate for LoopVersioningLICM. 6; It also confirms invariant moved out of loop. 7; 8; CHECK: Loop: Loop at depth 2 containing: %for.body3<header><latch><exiting> 9; CHECK-NEXT: Loop Versioning found to be beneficial 10; 11; CHECK: for.body3: 12; CHECK-NEXT: %[[induction:.*]] = phi i32 [ %arrayidx7.promoted, %for.body3.ph ], [ %add8, %for.body3 ] 13; CHECK-NEXT: %j.113 = phi i32 [ %j.016, %for.body3.ph ], [ %inc, %for.body3 ] 14; CHECK-NEXT: %idxprom = zext i32 %j.113 to i64 15; CHECK-NEXT: %arrayidx = getelementptr inbounds i32, i32* %var1, i64 %idxprom 16; CHECK-NEXT: store i32 %add, i32* %arrayidx, align 4, !alias.scope !2, !noalias !2 17; CHECK-NEXT: %add8 = add nsw i32 %[[induction]], %add 18; CHECK-NEXT: %inc = add nuw i32 %j.113, 1 19; CHECK-NEXT: %cmp2 = icmp ult i32 %inc, %itr 20; CHECK-NEXT: br i1 %cmp2, label %for.body3, label %for.inc11.loopexit.loopexit7, !llvm.loop !5 21define i32 @foo(i32* nocapture %var1, i32* nocapture readnone %var2, i32* nocapture %var3, i32 %itr) #0 { 22entry: 23 %cmp14 = icmp eq i32 %itr, 0 24 br i1 %cmp14, label %for.end13, label %for.cond1.preheader.preheader 25 26for.cond1.preheader.preheader: ; preds = %entry 27 br label %for.cond1.preheader 28 29for.cond1.preheader: ; preds = %for.cond1.preheader.preheader, %for.inc11 30 %j.016 = phi i32 [ %j.1.lcssa, %for.inc11 ], [ 0, %for.cond1.preheader.preheader ] 31 %i.015 = phi i32 [ %inc12, %for.inc11 ], [ 0, %for.cond1.preheader.preheader ] 32 %cmp212 = icmp ult i32 %j.016, %itr 33 br i1 %cmp212, label %for.body3.lr.ph, label %for.inc11 34 35for.body3.lr.ph: ; preds = %for.cond1.preheader 36 %add = add i32 %i.015, %itr 37 %idxprom6 = zext i32 %i.015 to i64 38 %arrayidx7 = getelementptr inbounds i32, i32* %var3, i64 %idxprom6 39 br label %for.body3 40 41for.body3: ; preds = %for.body3.lr.ph, %for.body3 42 %j.113 = phi i32 [ %j.016, %for.body3.lr.ph ], [ %inc, %for.body3 ] 43 %idxprom = zext i32 %j.113 to i64 44 %arrayidx = getelementptr inbounds i32, i32* %var1, i64 %idxprom 45 store i32 %add, i32* %arrayidx, align 4 46 %0 = load i32, i32* %arrayidx7, align 4 47 %add8 = add nsw i32 %0, %add 48 store i32 %add8, i32* %arrayidx7, align 4 49 %inc = add nuw i32 %j.113, 1 50 %cmp2 = icmp ult i32 %inc, %itr 51 br i1 %cmp2, label %for.body3, label %for.inc11.loopexit 52 53for.inc11.loopexit: ; preds = %for.body3 54 br label %for.inc11 55 56for.inc11: ; preds = %for.inc11.loopexit, %for.cond1.preheader 57 %j.1.lcssa = phi i32 [ %j.016, %for.cond1.preheader ], [ %itr, %for.inc11.loopexit ] 58 %inc12 = add nuw i32 %i.015, 1 59 %cmp = icmp ult i32 %inc12, %itr 60 br i1 %cmp, label %for.cond1.preheader, label %for.end13.loopexit 61 62for.end13.loopexit: ; preds = %for.inc11 63 br label %for.end13 64 65for.end13: ; preds = %for.end13.loopexit, %entry 66 ret i32 0 67} 68 69