66ce4f771e
This patch moves the logic to create remarks for instructions with invalid costs to work on recipes and decoupling it from selectVectorizationFactor. This is needed to replace the remaining uses of selectVectorizationFactor with getBestPlan using the VPlan-based cost model. The current implementation iterates over all VPlans and their recipes again, to find recipes with invalid costs, which is more work but will only be done when remarks for LV are enabled. Once the remaining uses of selectVectorizationFactor are retired, we can collect VPlans with invalid costs as part of getBestPlan if we want to optimize the remarks case a bit, at the cost of adding additional complexity. PR: https://github.com/llvm/llvm-project/pull/99322
32 lines
1.1 KiB
LLVM
32 lines
1.1 KiB
LLVM
; RUN: opt -S -passes=loop-vectorize -mattr=+sve -mtriple aarch64-unknown-linux-gnu -force-vector-width=2 -pass-remarks-analysis=loop-vectorize -pass-remarks-missed=loop-vectorize < %s 2>%t | FileCheck %s
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; RUN: FileCheck %s --check-prefix=CHECK-REMARKS < %t
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; CHECK-REMARKS: UserVF ignored because of invalid costs.
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; CHECK-REMARKS: Recipe with invalid costs prevented vectorization at VF=(vscale x 1, vscale x 2): alloca
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; CHECK-REMARKS: Recipe with invalid costs prevented vectorization at VF=(vscale x 1): store
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define void @alloca(ptr %vla, i64 %N) {
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; CHECK-LABEL: @alloca(
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; CHECK-NOT: <vscale x
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entry:
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br label %for.body
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for.body:
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%iv = phi i64 [ %iv.next, %for.body ], [ 0, %entry ]
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%alloca = alloca i32, align 16
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%arrayidx = getelementptr inbounds ptr, ptr %vla, i64 %iv
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store ptr %alloca, ptr %arrayidx, align 8
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%iv.next = add nuw nsw i64 %iv, 1
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%exitcond.not = icmp eq i64 %iv.next, %N
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br i1 %exitcond.not, label %for.end, label %for.body, !llvm.loop !0
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for.end:
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call void @foo(ptr nonnull %vla)
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ret void
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}
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declare void @foo(ptr)
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!0 = !{!0, !1}
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!1 = !{!"llvm.loop.vectorize.scalable.enable", i1 true}
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