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Imported Upstream version 5.18.0.207
Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449
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; RUN: opt -instcombine -S < %s | FileCheck %s
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; This used to crash opt
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@c = common global i32 0, align 4
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@b = common global i32 0, align 4
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@a = common global i16 0, align 2
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@d = common global i32 0, align 4
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define void @fn3() {
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; CHECK: @fn3
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bb:
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%tmp = load i32, i32* @c, align 4
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%tmp1 = icmp eq i32 %tmp, 0
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br i1 %tmp1, label %bb2, label %bb6
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bb2: ; preds = %bb
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%tmp3 = load i32, i32* @b, align 4
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%tmp.i = add nsw i32 255, %tmp3
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%tmp5 = icmp ugt i32 %tmp.i, 254
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br label %bb6
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bb6: ; preds = %bb, %bb2
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%tmp7 = phi i1 [ true, %bb ], [ %tmp5, %bb2 ]
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%tmp8 = zext i1 %tmp7 to i32
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%tmp10 = icmp eq i32 %tmp8, 0
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%tmp12 = load i16, i16* @a, align 2
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%tmp14 = icmp ne i16 %tmp12, 0
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%tmp16 = select i1 %tmp10, i1 false, i1 %tmp14
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%tmp17 = zext i1 %tmp16 to i32
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store i32 %tmp17, i32* @d, align 4
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ret void
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}
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