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