forked from OSchip/llvm-project
167 lines
4.9 KiB
LLVM
167 lines
4.9 KiB
LLVM
; RUN: opt -mtriple=aarch64--linux-gnueabi -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 < %s -S | FileCheck %s
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; The following tests contain loops for which SCEV cannot determine the backedge
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; taken count. This is because the backedge taken condition is produced by an
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; icmp with one of the sides being a loop varying non-AddRec expression.
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; However, there is a possibility to normalize this to an AddRec expression
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; using SCEV predicates. This allows us to compute a 'guarded' backedge count.
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; The Loop Vectorizer is able to version to loop in order to use this guarded
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; backedge count and vectorize more loops.
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; CHECK-LABEL: test_sge
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; CHECK-LABEL: vector.scevcheck
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; CHECK-LABEL: vector.body
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define void @test_sge(i32* noalias %A,
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i32* noalias %B,
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i32* noalias %C, 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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for.body.preheader:
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br label %for.body
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for.body:
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%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ 0, %for.body.preheader ]
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%indvars.next = add i16 %indvars.iv, 1
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%indvars.ext = zext i16 %indvars.iv to i32
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%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.ext
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%0 = load i32, i32* %arrayidx, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.ext
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%1 = load i32, i32* %arrayidx3, align 4
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%mul4 = mul i32 %1, %0
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%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.ext
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store i32 %mul4, i32* %arrayidx7, align 4
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%exitcond = icmp sge i32 %indvars.ext, %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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; CHECK-LABEL: test_uge
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; CHECK-LABEL: vector.scevcheck
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; CHECK-LABEL: vector.body
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define void @test_uge(i32* noalias %A,
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i32* noalias %B,
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i32* noalias %C, i32 %N, i32 %Offset) {
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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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for.body.preheader:
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br label %for.body
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for.body:
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%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ 0, %for.body.preheader ]
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%indvars.next = add i16 %indvars.iv, 1
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%indvars.ext = sext i16 %indvars.iv to i32
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%indvars.access = add i32 %Offset, %indvars.ext
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%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.access
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%0 = load i32, i32* %arrayidx, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.access
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%1 = load i32, i32* %arrayidx3, align 4
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%mul4 = add i32 %1, %0
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%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.access
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store i32 %mul4, i32* %arrayidx7, align 4
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%exitcond = icmp uge i32 %indvars.ext, %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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; CHECK-LABEL: test_ule
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; CHECK-LABEL: vector.scevcheck
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; CHECK-LABEL: vector.body
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define void @test_ule(i32* noalias %A,
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i32* noalias %B,
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i32* noalias %C, i32 %N,
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i16 %M) {
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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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for.body.preheader:
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br label %for.body
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for.body:
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%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ %M, %for.body.preheader ]
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%indvars.next = sub i16 %indvars.iv, 1
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%indvars.ext = zext i16 %indvars.iv to i32
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%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.ext
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%0 = load i32, i32* %arrayidx, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.ext
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%1 = load i32, i32* %arrayidx3, align 4
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%mul4 = mul i32 %1, %0
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%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.ext
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store i32 %mul4, i32* %arrayidx7, align 4
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%exitcond = icmp ule i32 %indvars.ext, %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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; CHECK-LABEL: test_sle
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; CHECK-LABEL: vector.scevcheck
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; CHECK-LABEL: vector.body
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define void @test_sle(i32* noalias %A,
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i32* noalias %B,
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i32* noalias %C, i32 %N,
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i16 %M) {
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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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for.body.preheader:
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br label %for.body
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for.body:
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%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ %M, %for.body.preheader ]
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%indvars.next = sub i16 %indvars.iv, 1
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%indvars.ext = sext i16 %indvars.iv to i32
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%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.ext
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%0 = load i32, i32* %arrayidx, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.ext
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%1 = load i32, i32* %arrayidx3, align 4
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%mul4 = mul i32 %1, %0
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%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.ext
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store i32 %mul4, i32* %arrayidx7, align 4
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%exitcond = icmp sle i32 %indvars.ext, %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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