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