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; RUN: opt < %s -gvn | llvm-dis
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.re_pattern_buffer = type { i8*, i64, i64, i64, i8*, i8*, i64, i8 }
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%struct.re_registers = type { i32, i32*, i32* }
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define fastcc i32 @byte_re_match_2_internal(%struct.re_pattern_buffer* nocapture %bufp, i8* %string1, i32 %size1, i8* %string2, i32 %size2, i32 %pos, %struct.re_registers* %regs, i32 %stop) nounwind {
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succeed_label: ; preds = %bb159
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bb159: ; preds = %bb664, %bb554, %bb159, %bb159, %bb159, %entry
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%d.0 = phi i8* [ null, %entry ], [ %d.0, %bb159 ], [ %d.0, %bb554 ], [ %d.0, %bb159 ], [ %d.0, %bb159 ], [ %d.12, %bb664 ] ; <i8*> [#uses=5]
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switch i32 0, label %bb661 [
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i32 1, label %succeed_label
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bb411: ; preds = %bb411, %bb159
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bb543: ; preds = %bb159
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br i1 false, label %bb549, label %bb550
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bb549: ; preds = %bb543
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bb550: ; preds = %bb543
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br i1 false, label %bb554, label %bb552
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bb552: ; preds = %bb550
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%0 = load i8, i8* %d.0, align 8 ; <i8> [#uses=0]
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bb554: ; preds = %bb552, %bb550, %bb549
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br i1 false, label %bb159, label %bb661
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bb622: ; preds = %bb622, %bb159
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bb661: ; preds = %bb554, %bb159
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%d.12 = select i1 false, i8* null, i8* null ; <i8*> [#uses=1]
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bb664: ; preds = %bb664, %bb661
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br i1 false, label %bb159, label %bb664