unroll.ll
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; This test makes sure that loop will not be unrolled in vectorization if VF computed
; equals to 1.
; RUN: opt < %s -loop-vectorize -S | FileCheck %s
; Make sure there are no geps being merged.
; CHECK-LABEL: @foo(
; CHECK: getelementptr
; CHECK-NOT: getelementptr
@N = common global i32 0, align 4
@a = common global [1000 x i32] zeroinitializer, align 16
define void @foo() #0 {
entry:
%0 = load i32, i32* @N, align 4
%cmp5 = icmp sgt i32 %0, 0
br i1 %cmp5, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
%conv = sext i32 %0 to i64
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.body
%i.06 = phi i64 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
%mul = mul nuw nsw i64 %i.06, 7
%arrayidx = getelementptr inbounds [1000 x i32], [1000 x i32]* @a, i64 0, i64 %mul
store i32 3, i32* %arrayidx, align 4
%inc = add nuw nsw i64 %i.06, 1
%cmp = icmp slt i64 %inc, %conv
br i1 %cmp, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
}