49d73130ca
This patch returns an Invalid cost from getInstructionCost() for alloca instructions if the VF is scalable, as otherwise loops which contain these instructions will crash when attempting to scalarize the alloca. Reviewed By: sdesmalen Differential Revision: https://reviews.llvm.org/D105824
32 lines
1.2 KiB
LLVM
32 lines
1.2 KiB
LLVM
; RUN: opt -S -loop-vectorize -mattr=+sve -mtriple aarch64-unknown-linux-gnu -force-vector-width=2 -scalable-vectorization=preferred -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: Instruction with invalid costs prevented vectorization at VF=(vscale x 1, vscale x 2): alloca
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; CHECK-REMARKS: Instruction with invalid costs prevented vectorization at VF=(vscale x 1): store
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define void @alloca(i32** %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 i32*, i32** %vla, i64 %iv
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store i32* %alloca, i32** %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(i32** nonnull %vla)
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ret void
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}
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declare void @foo(i32**)
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!0 = !{!0, !1}
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!1 = !{!"llvm.loop.vectorize.scalable.enable", i1 true}
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