forked from OSchip/llvm-project
45 lines
1.9 KiB
LLVM
45 lines
1.9 KiB
LLVM
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; RUN: opt %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -S | FileCheck %s
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; RUN: opt %s -loop-vectorize -force-vector-interleave=2 -force-vector-width=4 -S | FileCheck %s -check-prefix=UNROLL
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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@b = common global [1000 x i32] zeroinitializer, align 16
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@c = common global [1000 x i32] zeroinitializer, align 16
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@a = common global [1000 x i32] zeroinitializer, align 16
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; Generate min.iters.check to skip the vector loop and jump to scalar.ph directly when loop iteration number is less than VF * UF.
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; CHECK-LABEL: foo(
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; CHECK: %min.iters.check = icmp ult i64 %N, 4
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; CHECK: br i1 %min.iters.check, label %scalar.ph, label %min.iters.checked
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; UNROLL-LABEL: foo(
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; UNROLL: %min.iters.check = icmp ult i64 %N, 8
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; UNROLL: br i1 %min.iters.check, label %scalar.ph, label %min.iters.checked
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define void @foo(i64 %N) {
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entry:
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%cmp.8 = icmp sgt i64 %N, 0
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br i1 %cmp.8, label %for.body.preheader, label %for.end
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body, %for.body.preheader
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%i.09 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
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%arrayidx = getelementptr inbounds [1000 x i32], [1000 x i32]* @b, i64 0, i64 %i.09
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%tmp = load i32, i32* %arrayidx, align 4
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%arrayidx1 = getelementptr inbounds [1000 x i32], [1000 x i32]* @c, i64 0, i64 %i.09
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%tmp1 = load i32, i32* %arrayidx1, align 4
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%add = add nsw i32 %tmp1, %tmp
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%arrayidx2 = getelementptr inbounds [1000 x i32], [1000 x i32]* @a, i64 0, i64 %i.09
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store i32 %add, i32* %arrayidx2, align 4
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%inc = add nuw nsw i64 %i.09, 1
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%exitcond = icmp eq i64 %inc, %N
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br i1 %exitcond, label %for.end.loopexit, label %for.body
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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}
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