45 lines
1.8 KiB
LLVM
45 lines
1.8 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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; SCEV expansion uses existing value or value + offset to reduce duplicate code expansion so foo should only generate one select inst after loop vectorization.
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; CHECK-LABEL: @foo(
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; CHECK: select
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; CHECK-NOT: select
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@ySrcL = common global i8* null, align 8
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@smL = common global i32 0, align 4
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define void @foo(i32 %rwL, i32 %kL, i32 %xfL) {
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entry:
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%sub = add nsw i32 %rwL, -1
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%shr = ashr i32 %xfL, 6
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%cmp.i = icmp slt i32 %sub, %shr
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%cond.i = select i1 %cmp.i, i32 %sub, i32 %shr
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%cmp6 = icmp sgt i32 %cond.i, %kL
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br i1 %cmp6, label %for.body.lr.ph, label %for.end
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for.body.lr.ph: ; preds = %entry
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%tmp = load i8*, i8** @ySrcL, align 8
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%tmp1 = sext i32 %kL to i64
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%tmp2 = sext i32 %cond.i to i64
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br label %for.body
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for.body: ; preds = %for.body, %for.body.lr.ph
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%indvars.iv = phi i64 [ %tmp1, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
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%reduct.07 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ]
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%arrayidx = getelementptr inbounds i8, i8* %tmp, i64 %indvars.iv
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%tmp3 = load i8, i8* %arrayidx, align 1
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%conv = zext i8 %tmp3 to i32
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%add = add nsw i32 %conv, %reduct.07
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%indvars.iv.next = add nsw i64 %indvars.iv, 1
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%cmp = icmp slt i64 %indvars.iv.next, %tmp2
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br i1 %cmp, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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%add.lcssa = phi i32 [ %add, %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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%reduct.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa, %for.end.loopexit ]
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store i32 %reduct.0.lcssa, i32* @smL, align 4
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ret void
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}
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