1; RUN: opt < %s -loop-vectorize -mtriple x86_64 -debug -disable-output 2>&1 | FileCheck %s 2; REQUIRES: asserts 3 4; Check that cost model is not executed twice for VF=2 when vectorization is 5; forced for a particular loop. 6 7; CHECK: LV: Found an estimated cost of {{[0-9]+}} for VF 2 For instruction: %{{[0-9]+}} = load i32 8; CHECK: LV: Found an estimated cost of {{[0-9]+}} for VF 2 For instruction: store i32 9; CHECK-NOT: LV: Found an estimated cost of {{[0-9]+}} for VF 2 For instruction: %{{[0-9]+}} = load i32 10; CHECK-NOT: LV: Found an estimated cost of {{[0-9]+}} for VF 2 For instruction: store i32 11; CHECK: LV: Vector loop of width 2 costs: {{[0-9]+}}. 12 13define i32 @foo(i32* %A, i32 %n) { 14entry: 15 %cmp3.i = icmp eq i32 %n, 0 16 br i1 %cmp3.i, label %exit, label %for.body.i 17 18for.body.i: 19 %iv = phi i32 [ %add.i, %for.body.i ], [ 0, %entry ] 20 %ld_addr = getelementptr inbounds i32, i32* %A, i32 %iv 21 %0 = load i32, i32* %ld_addr, align 4 22 %val = add i32 %0, 1 23 store i32 %val, i32* %ld_addr, align 4 24 %add.i = add nsw i32 %iv, 1 25 %cmp.i = icmp eq i32 %add.i, %n 26 br i1 %cmp.i, label %exit, label %for.body.i, !llvm.loop !0 27 28exit: 29 %__init.addr.0.lcssa.i = phi i32 [ 0, %entry ], [ %add.i, %for.body.i ] 30 ret i32 %__init.addr.0.lcssa.i 31} 32 33!0 = !{!0, !1} 34!1 = !{!"llvm.loop.vectorize.enable", i1 true} 35