| ; RUN: opt < %s -O1 -S -loop-versioning-licm -licm -debug-only=loop-versioning-licm -enable-new-pm=0 2>&1 | FileCheck %s |
| ; RUN: opt < %s -S -passes='default<O1>,function(loop-versioning-licm,loop-mssa(licm))' -debug-only=loop-versioning-licm 2>&1 | FileCheck %s |
| ; REQUIRES: asserts |
| ; |
| ; Test to confirm loop is a candidate for LoopVersioningLICM. |
| ; It also confirms invariant moved out of loop. |
| ; |
| ; CHECK: Loop: Loop at depth 2 containing: %for.body3<header><latch><exiting> |
| ; CHECK-NEXT: Loop Versioning found to be beneficial |
| ; |
| ; CHECK: for.body3: |
| ; CHECK-NEXT: %[[induction:.*]] = phi i32 [ %arrayidx7.promoted, %for.body3.ph ], [ %add8, %for.body3 ] |
| ; CHECK-NEXT: %j.113 = phi i32 [ %j.016, %for.body3.ph ], [ %inc, %for.body3 ] |
| ; CHECK-NEXT: %idxprom = zext i32 %j.113 to i64 |
| ; CHECK-NEXT: %arrayidx = getelementptr inbounds i32, i32* %var1, i64 %idxprom |
| ; CHECK-NEXT: store i32 %add, i32* %arrayidx, align 4, !alias.scope !2, !noalias !2 |
| ; CHECK-NEXT: %add8 = add nsw i32 %[[induction]], %add |
| ; CHECK-NEXT: %inc = add nuw i32 %j.113, 1 |
| ; CHECK-NEXT: %cmp2 = icmp ult i32 %inc, %itr |
| ; CHECK-NEXT: br i1 %cmp2, label %for.body3, label %for.inc11.loopexit.loopexit9, !llvm.loop !5 |
| define i32 @foo(i32* nocapture %var1, i32* nocapture readnone %var2, i32* nocapture %var3, i32 %itr) #0 { |
| entry: |
| %cmp14 = icmp eq i32 %itr, 0 |
| br i1 %cmp14, label %for.end13, label %for.cond1.preheader.preheader |
| |
| for.cond1.preheader.preheader: ; preds = %entry |
| br label %for.cond1.preheader |
| |
| for.cond1.preheader: ; preds = %for.cond1.preheader.preheader, %for.inc11 |
| %j.016 = phi i32 [ %j.1.lcssa, %for.inc11 ], [ 0, %for.cond1.preheader.preheader ] |
| %i.015 = phi i32 [ %inc12, %for.inc11 ], [ 0, %for.cond1.preheader.preheader ] |
| %cmp212 = icmp ult i32 %j.016, %itr |
| br i1 %cmp212, label %for.body3.lr.ph, label %for.inc11 |
| |
| for.body3.lr.ph: ; preds = %for.cond1.preheader |
| %add = add i32 %i.015, %itr |
| %idxprom6 = zext i32 %i.015 to i64 |
| %arrayidx7 = getelementptr inbounds i32, i32* %var3, i64 %idxprom6 |
| br label %for.body3 |
| |
| for.body3: ; preds = %for.body3.lr.ph, %for.body3 |
| %j.113 = phi i32 [ %j.016, %for.body3.lr.ph ], [ %inc, %for.body3 ] |
| %idxprom = zext i32 %j.113 to i64 |
| %arrayidx = getelementptr inbounds i32, i32* %var1, i64 %idxprom |
| store i32 %add, i32* %arrayidx, align 4 |
| %0 = load i32, i32* %arrayidx7, align 4 |
| %add8 = add nsw i32 %0, %add |
| store i32 %add8, i32* %arrayidx7, align 4 |
| %inc = add nuw i32 %j.113, 1 |
| %cmp2 = icmp ult i32 %inc, %itr |
| br i1 %cmp2, label %for.body3, label %for.inc11.loopexit |
| |
| for.inc11.loopexit: ; preds = %for.body3 |
| br label %for.inc11 |
| |
| for.inc11: ; preds = %for.inc11.loopexit, %for.cond1.preheader |
| %j.1.lcssa = phi i32 [ %j.016, %for.cond1.preheader ], [ %itr, %for.inc11.loopexit ] |
| %inc12 = add nuw i32 %i.015, 1 |
| %cmp = icmp ult i32 %inc12, %itr |
| br i1 %cmp, label %for.cond1.preheader, label %for.end13.loopexit |
| |
| for.end13.loopexit: ; preds = %for.inc11 |
| br label %for.end13 |
| |
| for.end13: ; preds = %for.end13.loopexit, %entry |
| ret i32 0 |
| } |
| |