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; RUN: opt < %s -loop-vectorize -mtriple x86_64 -debug -disable-output 2>&1 | FileCheck %s
; REQUIRES: asserts
; Check that cost model is not executed twice for VF=2 when vectorization is
; forced for a particular loop.
; CHECK: LV: Found an estimated cost of {{[0-9]+}} for VF 2 For instruction: %{{[0-9]+}} = load i32
; CHECK: LV: Found an estimated cost of {{[0-9]+}} for VF 2 For instruction: store i32
; CHECK-NOT: LV: Found an estimated cost of {{[0-9]+}} for VF 2 For instruction: %{{[0-9]+}} = load i32
; CHECK-NOT: LV: Found an estimated cost of {{[0-9]+}} for VF 2 For instruction: store i32
; CHECK: LV: Vector loop of width 2 costs: {{[0-9]+}}.
define i32 @foo(i32* %A, i32 %n) {
entry:
%cmp3.i = icmp eq i32 %n, 0
br i1 %cmp3.i, label %exit, label %for.body.i
for.body.i:
%iv = phi i32 [ %add.i, %for.body.i ], [ 0, %entry ]
%ld_addr = getelementptr inbounds i32, i32* %A, i32 %iv
%0 = load i32, i32* %ld_addr, align 4
%val = add i32 %0, 1
store i32 %val, i32* %ld_addr, align 4
%add.i = add nsw i32 %iv, 1
%cmp.i = icmp eq i32 %add.i, %n
br i1 %cmp.i, label %exit, label %for.body.i, !llvm.loop !0
exit:
%__init.addr.0.lcssa.i = phi i32 [ 0, %entry ], [ %add.i, %for.body.i ]
ret i32 %__init.addr.0.lcssa.i
}
!0 = !{!0, !1}
!1 = !{!"llvm.loop.vectorize.enable", i1 true}
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