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; RUN: opt -mtriple=aarch64--linux-gnueabi -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 < %s -S | FileCheck %s
; The following tests contain loops for which SCEV cannot determine the backedge
; taken count. This is because the backedge taken condition is produced by an
; icmp with one of the sides being a loop varying non-AddRec expression.
; However, there is a possibility to normalize this to an AddRec expression
; using SCEV predicates. This allows us to compute a 'guarded' backedge count.
; The Loop Vectorizer is able to version to loop in order to use this guarded
; backedge count and vectorize more loops.
; CHECK-LABEL: test_sge
; CHECK-LABEL: vector.scevcheck
; CHECK-LABEL: vector.body
define void @test_sge(i32* noalias %A,
i32* noalias %B,
i32* noalias %C, i32 %N) {
entry:
%cmp13 = icmp eq i32 %N, 0
br i1 %cmp13, label %for.end, label %for.body.preheader
for.body.preheader:
br label %for.body
for.body:
%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ 0, %for.body.preheader ]
%indvars.next = add i16 %indvars.iv, 1
%indvars.ext = zext i16 %indvars.iv to i32
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.ext
%0 = load i32, i32* %arrayidx, align 4
%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.ext
%1 = load i32, i32* %arrayidx3, align 4
%mul4 = mul i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.ext
store i32 %mul4, i32* %arrayidx7, align 4
%exitcond = icmp sge i32 %indvars.ext, %N
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit:
br label %for.end
for.end:
ret void
}
; CHECK-LABEL: test_uge
; CHECK-LABEL: vector.scevcheck
; CHECK-LABEL: vector.body
define void @test_uge(i32* noalias %A,
i32* noalias %B,
i32* noalias %C, i32 %N, i32 %Offset) {
entry:
%cmp13 = icmp eq i32 %N, 0
br i1 %cmp13, label %for.end, label %for.body.preheader
for.body.preheader:
br label %for.body
for.body:
%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ 0, %for.body.preheader ]
%indvars.next = add i16 %indvars.iv, 1
%indvars.ext = sext i16 %indvars.iv to i32
%indvars.access = add i32 %Offset, %indvars.ext
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.access
%0 = load i32, i32* %arrayidx, align 4
%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.access
%1 = load i32, i32* %arrayidx3, align 4
%mul4 = add i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.access
store i32 %mul4, i32* %arrayidx7, align 4
%exitcond = icmp uge i32 %indvars.ext, %N
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit:
br label %for.end
for.end:
ret void
}
; CHECK-LABEL: test_ule
; CHECK-LABEL: vector.scevcheck
; CHECK-LABEL: vector.body
define void @test_ule(i32* noalias %A,
i32* noalias %B,
i32* noalias %C, i32 %N,
i16 %M) {
entry:
%cmp13 = icmp eq i32 %N, 0
br i1 %cmp13, label %for.end, label %for.body.preheader
for.body.preheader:
br label %for.body
for.body:
%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ %M, %for.body.preheader ]
%indvars.next = sub i16 %indvars.iv, 1
%indvars.ext = zext i16 %indvars.iv to i32
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.ext
%0 = load i32, i32* %arrayidx, align 4
%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.ext
%1 = load i32, i32* %arrayidx3, align 4
%mul4 = mul i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.ext
store i32 %mul4, i32* %arrayidx7, align 4
%exitcond = icmp ule i32 %indvars.ext, %N
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit:
br label %for.end
for.end:
ret void
}
; CHECK-LABEL: test_sle
; CHECK-LABEL: vector.scevcheck
; CHECK-LABEL: vector.body
define void @test_sle(i32* noalias %A,
i32* noalias %B,
i32* noalias %C, i32 %N,
i16 %M) {
entry:
%cmp13 = icmp eq i32 %N, 0
br i1 %cmp13, label %for.end, label %for.body.preheader
for.body.preheader:
br label %for.body
for.body:
%indvars.iv = phi i16 [ %indvars.next, %for.body ], [ %M, %for.body.preheader ]
%indvars.next = sub i16 %indvars.iv, 1
%indvars.ext = sext i16 %indvars.iv to i32
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %indvars.ext
%0 = load i32, i32* %arrayidx, align 4
%arrayidx3 = getelementptr inbounds i32, i32* %C, i32 %indvars.ext
%1 = load i32, i32* %arrayidx3, align 4
%mul4 = mul i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %indvars.ext
store i32 %mul4, i32* %arrayidx7, align 4
%exitcond = icmp sle i32 %indvars.ext, %N
br i1 %exitcond, label %for.end.loopexit, label %for.body
for.end.loopexit:
br label %for.end
for.end:
ret void
}
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