forked from OSchip/llvm-project
95 lines
3.6 KiB
LLVM
95 lines
3.6 KiB
LLVM
; RUN: opt -loop-idiom -S < %s | FileCheck %s
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; CHECK-LABEL: define i32 @main(
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; CHECK: udiv
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; CHECK-NOT: udiv
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; CHECK: call void @llvm.memset.p0i8.i64
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@a = common local_unnamed_addr global [4 x i8] zeroinitializer, align 1
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@b = common local_unnamed_addr global i32 0, align 4
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@c = common local_unnamed_addr global i32 0, align 4
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@d = common local_unnamed_addr global i32 0, align 4
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@e = common local_unnamed_addr global i32 0, align 4
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@f = common local_unnamed_addr global i32 0, align 4
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@g = common local_unnamed_addr global i32 0, align 4
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@h = common local_unnamed_addr global i64 0, align 8
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define i32 @main() local_unnamed_addr #0 {
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entry:
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%0 = load i32, i32* @e, align 4
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%tobool19 = icmp eq i32 %0, 0
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%1 = load i32, i32* @c, align 4
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%cmp10 = icmp eq i32 %1, 0
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%2 = load i32, i32* @g, align 4
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%3 = load i32, i32* @b, align 4
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%tobool = icmp eq i32 %0, 0
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br label %for.cond
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for.cond.loopexit: ; preds = %for.inc14
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br label %for.cond.backedge
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for.cond: ; preds = %for.cond.backedge, %entry
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%.pr = load i32, i32* @f, align 4
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%cmp20 = icmp eq i32 %.pr, 0
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br i1 %cmp20, label %for.cond2.preheader.preheader, label %for.cond.backedge
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for.cond.backedge: ; preds = %for.cond, %for.cond.loopexit
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br label %for.cond
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for.cond2.preheader.preheader: ; preds = %for.cond
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br label %for.cond2.preheader
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for.cond2.preheader: ; preds = %for.cond2.preheader.preheader, %for.inc14
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br i1 %tobool19, label %for.cond9, label %for.body3.lr.ph
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for.body3.lr.ph: ; preds = %for.cond2.preheader
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%div = udiv i32 %2, %3
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%conv = zext i32 %div to i64
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br label %for.body3
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for.cond4.for.cond2.loopexit_crit_edge: ; preds = %for.body6
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store i32 0, i32* @d, align 4
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br label %for.cond2.loopexit
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for.cond2.loopexit: ; preds = %for.cond4.for.cond2.loopexit_crit_edge, %for.body3
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br i1 %tobool, label %for.cond2.for.cond9_crit_edge, label %for.body3
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for.body3: ; preds = %for.body3.lr.ph, %for.cond2.loopexit
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%.pr17 = load i32, i32* @d, align 4
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%tobool518 = icmp eq i32 %.pr17, 0
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br i1 %tobool518, label %for.cond2.loopexit, label %for.body6.preheader
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for.body6.preheader: ; preds = %for.body3
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%4 = zext i32 %.pr17 to i64
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br label %for.body6
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for.body6: ; preds = %for.body6.preheader, %for.body6
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%indvars.iv = phi i64 [ %4, %for.body6.preheader ], [ %indvars.iv.next, %for.body6 ]
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%add = add nuw nsw i64 %conv, %indvars.iv
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%arrayidx = getelementptr inbounds [4 x i8], [4 x i8]* @a, i64 0, i64 %add
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store i8 1, i8* %arrayidx, align 1
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%5 = trunc i64 %indvars.iv to i32
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%inc = add i32 %5, 1
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%tobool5 = icmp eq i32 %inc, 0
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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br i1 %tobool5, label %for.cond4.for.cond2.loopexit_crit_edge, label %for.body6
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for.cond2.for.cond9_crit_edge: ; preds = %for.cond2.loopexit
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store i64 %conv, i64* @h, align 8
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br label %for.cond9
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for.cond9: ; preds = %for.cond2.for.cond9_crit_edge, %for.cond2.preheader
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br i1 %cmp10, label %for.body12, label %for.inc14
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for.body12: ; preds = %for.cond9
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ret i32 0
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for.inc14: ; preds = %for.cond9
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%6 = load i32, i32* @f, align 4
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%inc15 = add i32 %6, 1
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store i32 %inc15, i32* @f, align 4
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%cmp = icmp eq i32 %inc15, 0
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br i1 %cmp, label %for.cond2.preheader, label %for.cond.loopexit
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}
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