da74ed42da
Since SystemZ supports vector element load/store instructions, there is no need for extracts/inserts if a vector load/store gets scalarized. This patch lets Target specify that it supports such instructions by means of a new TTI hook that defaults to false. The use for this is in the LoopVectorizer getScalarizationOverhead() method, which will with this patch produce a smaller sum for a vector load/store on SystemZ. New test: test/Transforms/LoopVectorize/SystemZ/load-store-scalarization-cost.ll Review: Adam Nemet https://reviews.llvm.org/D30680 llvm-svn: 300056
34 lines
1.1 KiB
LLVM
34 lines
1.1 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -mtriple=s390x-unknown-linux -mcpu=z13 -loop-vectorize \
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; RUN: -force-vector-width=4 -debug-only=loop-vectorize \
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; RUN: -disable-output -enable-interleaved-mem-accesses=false < %s 2>&1 | \
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; RUN: FileCheck %s
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;
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; Check that a scalarized load/store does not get a cost for insterts/
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; extracts, since z13 supports element load/store.
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define void @fun(i32* %data, i64 %n) {
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entry:
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br label %for.body
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for.body:
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%i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
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%tmp0 = getelementptr inbounds i32, i32* %data, i64 %i
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%tmp1 = load i32, i32* %tmp0, align 4
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%tmp2 = add i32 %tmp1, 1
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store i32 %tmp2, i32* %tmp0, align 4
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%i.next = add nuw nsw i64 %i, 2
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%cond = icmp slt i64 %i.next, %n
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br i1 %cond, label %for.body, label %for.end
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for.end:
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ret void
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; CHECK: LV: Found an estimated cost of 4 for VF 4 For instruction: %tmp1 = load i32, i32* %tmp0, align 4
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; CHECK: LV: Found an estimated cost of 4 for VF 4 For instruction: store i32 %tmp2, i32* %tmp0, align 4
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; CHECK: LV: Scalarizing: %tmp1 = load i32, i32* %tmp0, align 4
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; CHECK: LV: Scalarizing: store i32 %tmp2, i32* %tmp0, align 4
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}
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