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https://github.com/c64scene-ar/llvm-6502.git
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ee3f7de62e
for (i = 0; i < N; ++i) A[i * Stride1] += B[i * Stride2]; We take loops like this and check that the symbolic strides 'Strided1/2' are one and drop to the scalar loop if they are not. This is currently disabled by default and hidden behind the flag 'enable-mem-access-versioning'. radar://13075509 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198950 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.5 KiB
LLVM
51 lines
1.5 KiB
LLVM
; RUN: opt -basicaa -loop-vectorize -enable-mem-access-versioning -force-vector-width=2 -force-vector-unroll=1 < %s -S | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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; CHECK-LABEL: test
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define void @test(i32* noalias %A, i64 %AStride,
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i32* noalias %B, i32 %BStride,
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i32* noalias %C, i64 %CStride, i32 %N) {
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entry:
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%cmp13 = icmp eq i32 %N, 0
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br i1 %cmp13, label %for.end, label %for.body.preheader
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; CHECK-DAG: icmp ne i64 %AStride, 1
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; CHECK-DAG: icmp ne i32 %BStride, 1
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; CHECK-DAG: icmp ne i64 %CStride, 1
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; CHECK: or
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; CHECK: or
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; CHECK: br
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; CHECK: vector.body
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; CHECK: load <2 x i32>
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for.body.preheader:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
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%iv.trunc = trunc i64 %indvars.iv to i32
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%mul = mul i32 %iv.trunc, %BStride
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%mul64 = zext i32 %mul to i64
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%arrayidx = getelementptr inbounds i32* %B, i64 %mul64
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%0 = load i32* %arrayidx, align 4
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%mul2 = mul nsw i64 %indvars.iv, %CStride
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%arrayidx3 = getelementptr inbounds i32* %C, i64 %mul2
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%1 = load i32* %arrayidx3, align 4
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%mul4 = mul nsw i32 %1, %0
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%mul3 = mul nsw i64 %indvars.iv, %AStride
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%arrayidx7 = getelementptr inbounds i32* %A, i64 %mul3
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store i32 %mul4, i32* %arrayidx7, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %N
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br i1 %exitcond, label %for.end.loopexit, label %for.body
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for.end.loopexit:
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br label %for.end
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for.end:
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ret void
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}
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