polly/test/ScopInfo/invariant_load_scalar_dep.ll

; RUN: opt %loadPolly -polly-process-unprofitable -polly-scops -polly-invariant-load-hoisting=true -analyze < %s | FileCheck %s
;
; CHECK: Invariant Accesses:
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT:   { Stmt_bb2[i0] -> MemRef_B[0] };
; CHECK-NOT:  MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NOT:   { Stmt_bb2[i0] -> MemRef_tmp[] };
;
;    void f(int *restrict A, int *restrict B) {
;      for (int i = 0; i < 1024; i++)
;        auto tmp = *B;
;        // Split BB
;        A[i] = tmp;
;    }
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"

define void @f(i32* noalias %A, i32* noalias %B) {
bb:
  br label %bb1

bb1:                                              ; preds = %bb4, %bb
  %indvars.iv = phi i64 [ %indvars.iv.next, %bb4 ], [ 0, %bb ]
  %exitcond = icmp ne i64 %indvars.iv, 1024
  br i1 %exitcond, label %bb2, label %bb5

bb2:                                              ; preds = %bb1
  %tmp = load i32, i32* %B, align 4
  br label %bb2b

bb2b:
  %tmp3 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
  store i32 %tmp, i32* %tmp3, align 4
  br label %bb4

bb4:                                              ; preds = %bb2
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  br label %bb1

bb5:                                              ; preds = %bb1
  ret void
}