1; RUN: llc < %s -march=x86 -regalloc=greedy -stop-after=greedy | FileCheck %s 2; Make sure bad eviction sequence doesnt occur 3 4; Part of the fix for bugzilla 26810. 5; This test is meant to make sure bad eviction sequence like the one described 6; below does not occur 7; 8; movl %ebp, 8($esp) # 4-byte Spill 9; movl %ecx, %ebp 10; movl %ebx, %ecx 11; movl $edi, %ebx 12; movl $edx, $edi 13; cltd 14; idivl %esi 15; movl $edi, $edx 16; movl %ebx, $edi 17; movl %ecx, %ebx 18; movl %ebp, %ecx 19; movl 16($esp), %ebp # 4 - byte Reload 20 21; Make sure we have no redundant copies in the problematic code seqtion 22; CHECK-LABEL: name: bar 23; CHECK: bb.3.for.body: 24; CHECK: $eax = COPY 25; CHECK-NEXT: CDQ 26; CHECK-NEXT: IDIV32r 27; CHECK-NEXT: ADD32rr 28 29 30target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 31target triple = "i386-pc-linux-gnu" 32 33 34; Function Attrs: norecurse nounwind readonly 35define i32 @bar(i32 %size, i32* nocapture readonly %arr, i32* nocapture readnone %tmp) local_unnamed_addr #1 { 36entry: 37 %0 = load i32, i32* %arr, align 4, !tbaa !3 38 %arrayidx3 = getelementptr inbounds i32, i32* %arr, i32 1 39 %1 = load i32, i32* %arrayidx3, align 4, !tbaa !3 40 %arrayidx5 = getelementptr inbounds i32, i32* %arr, i32 2 41 %2 = load i32, i32* %arrayidx5, align 4, !tbaa !3 42 %arrayidx7 = getelementptr inbounds i32, i32* %arr, i32 3 43 %3 = load i32, i32* %arrayidx7, align 4, !tbaa !3 44 %arrayidx9 = getelementptr inbounds i32, i32* %arr, i32 4 45 %4 = load i32, i32* %arrayidx9, align 4, !tbaa !3 46 %arrayidx11 = getelementptr inbounds i32, i32* %arr, i32 5 47 %5 = load i32, i32* %arrayidx11, align 4, !tbaa !3 48 %arrayidx13 = getelementptr inbounds i32, i32* %arr, i32 6 49 %6 = load i32, i32* %arrayidx13, align 4, !tbaa !3 50 %arrayidx15 = getelementptr inbounds i32, i32* %arr, i32 7 51 %7 = load i32, i32* %arrayidx15, align 4, !tbaa !3 52 %arrayidx17 = getelementptr inbounds i32, i32* %arr, i32 8 53 %8 = load i32, i32* %arrayidx17, align 4, !tbaa !3 54 %cmp69 = icmp sgt i32 %size, 1 55 br i1 %cmp69, label %for.body, label %for.cond.cleanup 56 57for.cond.cleanup: ; preds = %for.body, %entry 58 %x0.0.lcssa = phi i32 [ %0, %entry ], [ %add, %for.body ] 59 %x1.0.lcssa = phi i32 [ %1, %entry ], [ %sub, %for.body ] 60 %x2.0.lcssa = phi i32 [ %2, %entry ], [ %mul, %for.body ] 61 %x3.0.lcssa = phi i32 [ %3, %entry ], [ %div, %for.body ] 62 %x4.0.lcssa = phi i32 [ %4, %entry ], [ %add19, %for.body ] 63 %x5.0.lcssa = phi i32 [ %5, %entry ], [ %sub20, %for.body ] 64 %x6.0.lcssa = phi i32 [ %6, %entry ], [ %add21, %for.body ] 65 %x7.0.lcssa = phi i32 [ %7, %entry ], [ %mul22, %for.body ] 66 %x8.0.lcssa = phi i32 [ %8, %entry ], [ %sub23, %for.body ] 67 %mul24 = mul nsw i32 %x1.0.lcssa, %x0.0.lcssa 68 %mul25 = mul nsw i32 %mul24, %x2.0.lcssa 69 %mul26 = mul nsw i32 %mul25, %x3.0.lcssa 70 %mul27 = mul nsw i32 %mul26, %x4.0.lcssa 71 %mul28 = mul nsw i32 %mul27, %x5.0.lcssa 72 %mul29 = mul nsw i32 %mul28, %x6.0.lcssa 73 %mul30 = mul nsw i32 %mul29, %x7.0.lcssa 74 %mul31 = mul nsw i32 %mul30, %x8.0.lcssa 75 ret i32 %mul31 76 77for.body: ; preds = %entry, %for.body 78 %i.079 = phi i32 [ %inc, %for.body ], [ 1, %entry ] 79 %x8.078 = phi i32 [ %sub23, %for.body ], [ %8, %entry ] 80 %x7.077 = phi i32 [ %mul22, %for.body ], [ %7, %entry ] 81 %x6.076 = phi i32 [ %add21, %for.body ], [ %6, %entry ] 82 %x5.075 = phi i32 [ %sub20, %for.body ], [ %5, %entry ] 83 %x4.074 = phi i32 [ %add19, %for.body ], [ %4, %entry ] 84 %x3.073 = phi i32 [ %div, %for.body ], [ %3, %entry ] 85 %x2.072 = phi i32 [ %mul, %for.body ], [ %2, %entry ] 86 %x1.071 = phi i32 [ %sub, %for.body ], [ %1, %entry ] 87 %x0.070 = phi i32 [ %add, %for.body ], [ %0, %entry ] 88 %add = add nsw i32 %x1.071, %x0.070 89 %sub = sub nsw i32 %x1.071, %x2.072 90 %mul = mul nsw i32 %x3.073, %x2.072 91 %div = sdiv i32 %x3.073, %x4.074 92 %add19 = add nsw i32 %x5.075, %x4.074 93 %sub20 = sub nsw i32 %x5.075, %x6.076 94 %add21 = add nsw i32 %x7.077, %x6.076 95 %mul22 = mul nsw i32 %x8.078, %x7.077 96 %sub23 = sub nsw i32 %x8.078, %add 97 %inc = add nuw nsw i32 %i.079, 1 98 %exitcond = icmp eq i32 %inc, %size 99 br i1 %exitcond, label %for.cond.cleanup, label %for.body, !llvm.loop !7 100} 101 102attributes #0 = { norecurse nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 103attributes #1 = { norecurse nounwind readonly "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 104 105!llvm.module.flags = !{!0, !1} 106!llvm.ident = !{!2} 107 108!0 = !{i32 1, !"NumRegisterParameters", i32 0} 109!1 = !{i32 1, !"wchar_size", i32 2} 110!2 = !{!"clang version 5.0.0 (cfe/trunk 305640)"} 111!3 = !{!4, !4, i64 0} 112!4 = !{!"int", !5, i64 0} 113!5 = !{!"omnipotent char", !6, i64 0} 114!6 = !{!"Simple C/C++ TBAA"} 115!7 = distinct !{!7, !8} 116!8 = !{!"llvm.loop.unroll.disable"} 117