test/Transforms/LoopDistribute/crash-in-memcheck-generation.ll

; RUN: opt -passes=loop-distribute,loop-vectorize -enable-loop-distribute -force-vector-width=4 \
; RUN:   -verify-loop-info -verify-dom-info -S < %s | FileCheck %s

; If only A and B can alias here, we don't need memchecks to distribute since
; A and B are in the same partition.  This used to cause a crash in the
; memcheck generation.
;
;   for (i = 0; i < n; i++) {
;     A[i + 1] = A[i] * B[i];
; ------------------------------
;     C[i] = D[i] * E[i];
;   }

target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.10.0"

define void @f(ptr  %a,
               ptr  %b,
               ptr noalias %c,
               ptr noalias %d,
               ptr noalias %e) {
entry:
  br label %for.body

; CHECK-NOT: memcheck:
; CHECK: mul <4 x i32>

for.body:                                         ; preds = %for.body, %entry
  %ind = phi i64 [ 0, %entry ], [ %add, %for.body ]

  %arrayidxA = getelementptr inbounds i32, ptr %a, i64 %ind
  %loadA = load i32, ptr %arrayidxA, align 4

  %arrayidxB = getelementptr inbounds i32, ptr %b, i64 %ind
  %loadB = load i32, ptr %arrayidxB, align 4

  %mulA = mul i32 %loadB, %loadA

  %add = add nuw nsw i64 %ind, 1
  %arrayidxA_plus_4 = getelementptr inbounds i32, ptr %a, i64 %add
  store i32 %mulA, ptr %arrayidxA_plus_4, align 4

  %arrayidxD = getelementptr inbounds i32, ptr %d, i64 %ind
  %loadD = load i32, ptr %arrayidxD, align 4

  %arrayidxE = getelementptr inbounds i32, ptr %e, i64 %ind
  %loadE = load i32, ptr %arrayidxE, align 4

  %mulC = mul i32 %loadD, %loadE

  %arrayidxC = getelementptr inbounds i32, ptr %c, i64 %ind
  store i32 %mulC, ptr %arrayidxC, align 4

  %exitcond = icmp eq i64 %add, 20
  br i1 %exitcond, label %for.end, label %for.body

for.end:                                          ; preds = %for.body
  ret void
}