117 lines
5.3 KiB
LLVM
117 lines
5.3 KiB
LLVM
; RUN: llc < %s -march=x86 -regalloc=greedy -stop-after=greedy | FileCheck %s
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; Make sure bad eviction sequence doesnt occur
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; Part of the fix for bugzilla 26810.
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; This test is meant to make sure bad eviction sequence like the one described
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; below does not occur
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;
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; movl %ebp, 8($esp) # 4-byte Spill
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; movl %ecx, %ebp
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; movl %ebx, %ecx
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; movl $edi, %ebx
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; movl $edx, $edi
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; cltd
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; idivl %esi
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; movl $edi, $edx
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; movl %ebx, $edi
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; movl %ecx, %ebx
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; movl %ebp, %ecx
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; movl 16($esp), %ebp # 4 - byte Reload
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; Make sure we have no redundant copies in the problematic code seqtion
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; CHECK-LABEL: name: bar
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; CHECK: bb.3.for.body:
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; CHECK: $eax = COPY
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; CHECK-NEXT: CDQ
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; CHECK-NEXT: IDIV32r
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; CHECK-NEXT: ADD32rr
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target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
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target triple = "i386-pc-linux-gnu"
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; Function Attrs: norecurse nounwind readonly
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define i32 @bar(i32 %size, i32* nocapture readonly %arr, i32* nocapture readnone %tmp) local_unnamed_addr #1 {
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entry:
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%0 = load i32, i32* %arr, align 4, !tbaa !3
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%arrayidx3 = getelementptr inbounds i32, i32* %arr, i32 1
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%1 = load i32, i32* %arrayidx3, align 4, !tbaa !3
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%arrayidx5 = getelementptr inbounds i32, i32* %arr, i32 2
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%2 = load i32, i32* %arrayidx5, align 4, !tbaa !3
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%arrayidx7 = getelementptr inbounds i32, i32* %arr, i32 3
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%3 = load i32, i32* %arrayidx7, align 4, !tbaa !3
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%arrayidx9 = getelementptr inbounds i32, i32* %arr, i32 4
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%4 = load i32, i32* %arrayidx9, align 4, !tbaa !3
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%arrayidx11 = getelementptr inbounds i32, i32* %arr, i32 5
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%5 = load i32, i32* %arrayidx11, align 4, !tbaa !3
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%arrayidx13 = getelementptr inbounds i32, i32* %arr, i32 6
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%6 = load i32, i32* %arrayidx13, align 4, !tbaa !3
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%arrayidx15 = getelementptr inbounds i32, i32* %arr, i32 7
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%7 = load i32, i32* %arrayidx15, align 4, !tbaa !3
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%arrayidx17 = getelementptr inbounds i32, i32* %arr, i32 8
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%8 = load i32, i32* %arrayidx17, align 4, !tbaa !3
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%cmp69 = icmp sgt i32 %size, 1
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br i1 %cmp69, label %for.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.body, %entry
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%x0.0.lcssa = phi i32 [ %0, %entry ], [ %add, %for.body ]
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%x1.0.lcssa = phi i32 [ %1, %entry ], [ %sub, %for.body ]
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%x2.0.lcssa = phi i32 [ %2, %entry ], [ %mul, %for.body ]
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%x3.0.lcssa = phi i32 [ %3, %entry ], [ %div, %for.body ]
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%x4.0.lcssa = phi i32 [ %4, %entry ], [ %add19, %for.body ]
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%x5.0.lcssa = phi i32 [ %5, %entry ], [ %sub20, %for.body ]
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%x6.0.lcssa = phi i32 [ %6, %entry ], [ %add21, %for.body ]
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%x7.0.lcssa = phi i32 [ %7, %entry ], [ %mul22, %for.body ]
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%x8.0.lcssa = phi i32 [ %8, %entry ], [ %sub23, %for.body ]
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%mul24 = mul nsw i32 %x1.0.lcssa, %x0.0.lcssa
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%mul25 = mul nsw i32 %mul24, %x2.0.lcssa
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%mul26 = mul nsw i32 %mul25, %x3.0.lcssa
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%mul27 = mul nsw i32 %mul26, %x4.0.lcssa
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%mul28 = mul nsw i32 %mul27, %x5.0.lcssa
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%mul29 = mul nsw i32 %mul28, %x6.0.lcssa
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%mul30 = mul nsw i32 %mul29, %x7.0.lcssa
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%mul31 = mul nsw i32 %mul30, %x8.0.lcssa
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ret i32 %mul31
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for.body: ; preds = %entry, %for.body
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%i.079 = phi i32 [ %inc, %for.body ], [ 1, %entry ]
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%x8.078 = phi i32 [ %sub23, %for.body ], [ %8, %entry ]
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%x7.077 = phi i32 [ %mul22, %for.body ], [ %7, %entry ]
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%x6.076 = phi i32 [ %add21, %for.body ], [ %6, %entry ]
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%x5.075 = phi i32 [ %sub20, %for.body ], [ %5, %entry ]
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%x4.074 = phi i32 [ %add19, %for.body ], [ %4, %entry ]
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%x3.073 = phi i32 [ %div, %for.body ], [ %3, %entry ]
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%x2.072 = phi i32 [ %mul, %for.body ], [ %2, %entry ]
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%x1.071 = phi i32 [ %sub, %for.body ], [ %1, %entry ]
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%x0.070 = phi i32 [ %add, %for.body ], [ %0, %entry ]
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%add = add nsw i32 %x1.071, %x0.070
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%sub = sub nsw i32 %x1.071, %x2.072
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%mul = mul nsw i32 %x3.073, %x2.072
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%div = sdiv i32 %x3.073, %x4.074
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%add19 = add nsw i32 %x5.075, %x4.074
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%sub20 = sub nsw i32 %x5.075, %x6.076
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%add21 = add nsw i32 %x7.077, %x6.076
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%mul22 = mul nsw i32 %x8.078, %x7.077
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%sub23 = sub nsw i32 %x8.078, %add
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%inc = add nuw nsw i32 %i.079, 1
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%exitcond = icmp eq i32 %inc, %size
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br i1 %exitcond, label %for.cond.cleanup, label %for.body, !llvm.loop !7
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}
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attributes #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" }
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attributes #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" }
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!llvm.module.flags = !{!0, !1}
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!llvm.ident = !{!2}
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!0 = !{i32 1, !"NumRegisterParameters", i32 0}
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!1 = !{i32 1, !"wchar_size", i32 2}
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!2 = !{!"clang version 5.0.0 (cfe/trunk 305640)"}
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!3 = !{!4, !4, i64 0}
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!4 = !{!"int", !5, i64 0}
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!5 = !{!"omnipotent char", !6, i64 0}
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!6 = !{!"Simple C/C++ TBAA"}
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!7 = distinct !{!7, !8}
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!8 = !{!"llvm.loop.unroll.disable"}
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