1 ; RUN: opt < %s -O1 -S -loop-versioning-licm -licm -debug-only=loop-versioning-licm -disable-loop-unrolling 2>&1 | FileCheck %s 2 ; REQUIRES: asserts 3 ; 4 ; Test to confirm loop is a good candidate for LoopVersioningLICM 5 ; It also confirms invariant moved out of loop. 6 ; 7 ; CHECK: Loop: Loop at depth 2 containing: %for.body3.us<header><latch><exiting> 8 ; CHECK-NEXT: Loop Versioning found to be beneficial 9 ; 10 ; CHECK: for.cond1.for.inc17_crit_edge.us.loopexit5: ; preds = %for.body3.us 11 ; CHECK-NEXT: %add14.us.lcssa = phi float [ %add14.us, %for.body3.us ] 12 ; CHECK-NEXT: store float %add14.us.lcssa, float* %arrayidx.us, align 4, !alias.scope !7, !noalias !8 13 ; CHECK-NEXT: br label %for.cond1.for.inc17_crit_edge.us 14 ; 15 define i32 @foo(float* nocapture %var2, float** nocapture readonly %var3, i32 %itr) #0 { 16 entry: 17 %cmp38 = icmp sgt i32 %itr, 1 18 br i1 %cmp38, label %for.body3.lr.ph.us, label %for.end19 19 20 for.body3.us: ; preds = %for.body3.us, %for.body3.lr.ph.us 21 %0 = phi float [ %.pre, %for.body3.lr.ph.us ], [ %add14.us, %for.body3.us ] 22 %indvars.iv = phi i64 [ 1, %for.body3.lr.ph.us ], [ %indvars.iv.next, %for.body3.us ] 23 %1 = trunc i64 %indvars.iv to i32 24 %conv.us = sitofp i32 %1 to float 25 %add.us = fadd float %conv.us, %0 26 %arrayidx7.us = getelementptr inbounds float, float* %3, i64 %indvars.iv 27 store float %add.us, float* %arrayidx7.us, align 4 28 %2 = load float, float* %arrayidx.us, align 4 29 %add14.us = fadd float %2, %add.us 30 store float %add14.us, float* %arrayidx.us, align 4 31 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 32 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 33 %exitcond = icmp eq i32 %lftr.wideiv, %itr 34 br i1 %exitcond, label %for.cond1.for.inc17_crit_edge.us, label %for.body3.us 35 36 for.body3.lr.ph.us: ; preds = %entry, %for.cond1.for.inc17_crit_edge.us 37 %indvars.iv40 = phi i64 [ %indvars.iv.next41, %for.cond1.for.inc17_crit_edge.us ], [ 1, %entry ] 38 %arrayidx.us = getelementptr inbounds float, float* %var2, i64 %indvars.iv40 39 %arrayidx6.us = getelementptr inbounds float*, float** %var3, i64 %indvars.iv40 40 %3 = load float*, float** %arrayidx6.us, align 8 41 %.pre = load float, float* %arrayidx.us, align 4 42 br label %for.body3.us 43 44 for.cond1.for.inc17_crit_edge.us: ; preds = %for.body3.us 45 %indvars.iv.next41 = add nuw nsw i64 %indvars.iv40, 1 46 %lftr.wideiv42 = trunc i64 %indvars.iv.next41 to i32 47 %exitcond43 = icmp eq i32 %lftr.wideiv42, %itr 48 br i1 %exitcond43, label %for.end19, label %for.body3.lr.ph.us 49 50 for.end19: ; preds = %for.cond1.for.inc17_crit_edge.us, %entry 51 ret i32 0 52 } 53
