27 lines
973 B
LLVM
27 lines
973 B
LLVM
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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; RUN: opt < %s -S -loop-vectorize -debug-only=loop-vectorize 2>&1 | FileCheck %s
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; REQUIRES: asserts
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; CHECK: LV: Can't vectorize due to memory conflicts
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define void @test_loop_novect(double** %arr, i64 %n) {
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for.body.lr.ph:
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%t = load double*, double** %arr, align 8
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br label %for.body
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for.body: ; preds = %for.body, %for.body.lr.ph
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%i = phi i64 [ 0, %for.body.lr.ph ], [ %i.next, %for.body ]
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%a = getelementptr inbounds double, double* %t, i64 %i
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%i.next = add nuw nsw i64 %i, 1
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%a.next = getelementptr inbounds double, double* %t, i64 %i.next
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%t1 = load double, double* %a, align 8
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%t2 = load double, double* %a.next, align 8
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store double %t1, double* %a.next, align 8
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store double %t2, double* %a, align 8
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%c = icmp eq i64 %i, %n
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br i1 %c, label %final, label %for.body
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final: ; preds = %for.body
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ret void
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}
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