polly/test/CodeGen/MemAccess/bad_alignment.ll


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; RUN: not --crash opt %loadPolly -polly-import-jscop -disable-output 2>&1 < %s | FileCheck %s
;
; Check that we do not allow to access elements not accessed before because the
; alignment information would become invalid.
;
; CHECK: JScop file changes the accessed memory
;
;    void bad_alignment(int *A) {
;      for (int i = 0; i < 1024; i += 2)
;        A[i] = i;
;    }
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"

define void @bad_alignment(ptr %A) {
entry:
  br label %for.cond

for.cond:                                         ; preds = %for.inc, %entry
  %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
  %cmp = icmp slt i64 %indvars.iv, 1024
  br i1 %cmp, label %for.body, label %for.end

for.body:                                         ; preds = %for.cond
  %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %tmp = trunc i64 %indvars.iv to i32
  store i32 %tmp, ptr %arrayidx, align 8
  br label %for.inc

for.inc:                                          ; preds = %for.body
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
  br label %for.cond

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