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; RUN: opt < %s -passes=loop-vectorize -force-vector-width=4 -S | FileCheck %s
; Test case for PR45525. Checks that phi's with a single predecessor and a mask are supported.
define void @main(i1 %cond, ptr %arr) {
; CHECK-LABEL: @main(
; CHECK-NEXT: bb.0:
; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK: [[VEC_IND:%.*]] = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK: [[TMP5:%.*]] = mul <4 x i32> [[VEC_IND]], <i32 3, i32 3, i32 3, i32 3>
;
bb.0:
br label %bb.1
bb.1: ; preds = %bb.3, %bb.0
%iv = phi i32 [ 0, %bb.0 ], [ %iv.next, %bb.3 ]
br i1 %cond, label %bb.3, label %bb.2
bb.2: ; preds = %bb.1
%single.pred = phi i32 [ %iv, %bb.1 ]
%mult = mul i32 %single.pred, 3
br label %bb.3
bb.3: ; preds = %bb.2, %bb.1
%stored.value = phi i32 [ 7, %bb.1 ], [ %mult, %bb.2 ]
%arrayidx = getelementptr inbounds i32, ptr %arr, i32 %iv
store i32 %stored.value, ptr %arrayidx
%iv.next = add i32 %iv, 1
%continue = icmp ult i32 %iv.next, 32
br i1 %continue, label %bb.1, label %bb.4
bb.4: ; preds = %bb.3
ret void
}
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