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38 lines
982 B
38 lines
982 B
4 months ago
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; RUN: opt %loadPolly -polly-scops -analyze \
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; RUN: < %s | FileCheck %s
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;
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; float foo(float sum, float A[]) {
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;
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; for (long i = 0; i < 100; i++)
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; sum += A[i];
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;
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; return sum;
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; }
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; Verify that we do not model the read from %sum. Reads that only happen in
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; case control flow reaches the PHI node from outside the SCoP are handled
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; implicitly during code generation.
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; CHECK: Stmt_bb1[i0] -> MemRef_phisum__ph
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; CHECK-NOT: Stmt_bb1[i0] -> MemRef_sum[]
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define float @foo(float %sum, float* %A) {
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bb:
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br label %bb1
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bb1:
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%i = phi i64 [ 0, %bb ], [ %i.next, %bb1 ]
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%phisum = phi float [ %sum, %bb ], [ %tmp5, %bb1 ]
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%tmp = getelementptr inbounds float, float* %A, i64 %i
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%tmp4 = load float, float* %tmp, align 4
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%tmp5 = fadd float %phisum, %tmp4
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%i.next = add nuw nsw i64 %i, 1
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%exitcond = icmp ne i64 %i, 100
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br i1 %exitcond, label %bb1, label %bb7
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bb7:
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ret float %phisum
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}
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