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64 lines
2.3 KiB
LLVM
64 lines
2.3 KiB
LLVM
; RUN: opt %loadPolly -analyze -polly-scops -polly-invariant-load-hoisting=true < %s | FileCheck %s
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;
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; Negative test. If we assume UB[*V] to be invariant we get a cyclic
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; dependence in the invariant loads that needs to be resolved by
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; ignoring the actual accessed address and focusing on the fact
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; that the access happened. However, at the moment we assume UB[*V]
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; not to be loop invariant, thus reject this region.
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;
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; CHECK-NOT: Statements
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;
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;
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; void f(int *restrict V, int *restrict UB, int *restrict A) {
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; for (int i = 0; i < 100; i++) {
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; int j = 0;
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; int x = 0;
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; do {
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; x = /* invariant load dependent on UB[*V] */ *V;
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; A[j + i]++;
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; } while (j++ < /* invariant load dependent on *V */ UB[x]);
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; }
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; }
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;
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target datalayout = "e-m:e-i32:64-f80:128-n8:16:32:64-S128"
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define void @f(i32* noalias %V, i32* noalias %UB, i32* noalias %A) {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%indvars.iv2 = phi i32 [ %indvars.iv.next3, %for.inc ], [ 0, %entry ]
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%exitcond = icmp ne i32 %indvars.iv2, 100
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br i1 %exitcond, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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br label %do.body
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do.body: ; preds = %do.cond, %for.body
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%indvars.iv = phi i32 [ %indvars.iv.next, %do.cond ], [ 0, %for.body ]
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%tmp = load i32, i32* %V, align 4
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%tmp4 = add nuw nsw i32 %indvars.iv, %indvars.iv2
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%arrayidx = getelementptr inbounds i32, i32* %A, i32 %tmp4
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%tmp5 = load i32, i32* %arrayidx, align 4
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%inc = add nsw i32 %tmp5, 1
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store i32 %inc, i32* %arrayidx, align 4
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br label %do.cond
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do.cond: ; preds = %do.body
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%indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
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%arrayidx3 = getelementptr inbounds i32, i32* %UB, i32 %tmp
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%tmp6 = load i32, i32* %arrayidx3, align 4
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%cmp4 = icmp slt i32 %indvars.iv, %tmp6
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br i1 %cmp4, label %do.body, label %do.end
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do.end: ; preds = %do.cond
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br label %for.inc
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for.inc: ; preds = %do.end
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%indvars.iv.next3 = add nuw nsw i32 %indvars.iv2, 1
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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