llvm-project

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; RUN: opt %loadNPMPolly -polly-stmt-granularity=bb "-passes=scop(print<polly-simplify>)" -disable-output -aa-pipeline=basic-aa < %s | FileCheck -match-full-lines %s
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;
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; Remove a store that is overwritten by another store in the same statement.
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;
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; for (int j = 0; j < n; j += 1) {
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;   A[0] = 21.0;
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;   A[0] = 42.0;
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; }
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;
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define void @overwritten(i32 %n, ptr noalias nonnull %A) {
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entry:
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  br label %for
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for:
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  %j = phi i32 [0, %entry], [%j.inc, %inc]
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  %j.cmp = icmp slt i32 %j, %n
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  br i1 %j.cmp, label %body, label %exit
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    body:
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      store double 21.0, ptr %A
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      store double 42.0, ptr %A
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      br label %inc
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inc:
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  %j.inc = add nuw nsw i32 %j, 1
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  br label %for
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exit:
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  br label %return
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return:
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  ret void
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}
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; CHECK: Statistics {
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; CHECK:     Overwrites removed: 1
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; CHECK: }
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; CHECK:      After accesses {
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; CHECK-NEXT:     Stmt_body
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; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT:                 [n] -> { Stmt_body[i0] -> MemRef_A[0] };
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; CHECK-NEXT: }
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