43 lines
1.6 KiB
LLVM
43 lines
1.6 KiB
LLVM
; RUN: opt < %s -basicaa -dse -enable-nonlocal-dse -S | FileCheck %s
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; The store in for.body block should be removed by non-local DSE.
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; CHECK-NOT: store i32 0, i32* %arrayidx
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;
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define void @sum(i32 %N, i32* noalias nocapture %C, i32* noalias nocapture readonly %A, i32* noalias nocapture readonly %B) {
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entry:
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%cmp24 = icmp eq i32 %N, 0
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br i1 %cmp24, label %for.end11, label %for.body
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for.body:
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%i.025 = phi i32 [ %inc10, %for.cond1.for.inc9_crit_edge ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %C, i32 %i.025
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store i32 0, i32* %arrayidx, align 4
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%mul = mul i32 %i.025, %N
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%arrayidx4.gep = getelementptr i32, i32* %A, i32 %mul
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br label %for.body3
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for.body3:
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%0 = phi i32 [ 0, %for.body ], [ %add8, %for.body3 ]
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%arrayidx4.phi = phi i32* [ %arrayidx4.gep, %for.body ], [ %arrayidx4.inc, %for.body3 ]
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%arrayidx5.phi = phi i32* [ %B, %for.body ], [ %arrayidx5.inc, %for.body3 ]
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%j.023 = phi i32 [ 0, %for.body ], [ %inc, %for.body3 ]
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%1 = load i32, i32* %arrayidx4.phi, align 4
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%2 = load i32, i32* %arrayidx5.phi, align 4
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%add6 = add nsw i32 %2, %1
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%add8 = add nsw i32 %add6, %0
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%inc = add i32 %j.023, 1
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%exitcond = icmp ne i32 %inc, %N
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%arrayidx4.inc = getelementptr i32, i32* %arrayidx4.phi, i32 1
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%arrayidx5.inc = getelementptr i32, i32* %arrayidx5.phi, i32 1
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br i1 %exitcond, label %for.body3, label %for.cond1.for.inc9_crit_edge
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for.cond1.for.inc9_crit_edge:
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store i32 %add8, i32* %arrayidx, align 4
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%inc10 = add i32 %i.025, 1
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%exitcond26 = icmp ne i32 %inc10, %N
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br i1 %exitcond26, label %for.body, label %for.end11
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for.end11:
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ret void
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}
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