; RUN: llvm-as < %s | opt -loop-unswitch -disable-output ; PR1559 target triple = "i686-pc-linux-gnu" %struct.re_pattern_buffer = type { i8*, i32, i32, i32, i8*, i8*, i32, i8 } define fastcc i32 @byte_regex_compile(i8* %pattern, i32 %size, i32 %syntax, %struct.re_pattern_buffer* %bufp) { entry: br i1 false, label %bb147, label %cond_next123 cond_next123: ; preds = %entry ret i32 0 bb147: ; preds = %entry switch i32 0, label %normal_char [ i32 91, label %bb1734 i32 92, label %bb5700 ] bb1734: ; preds = %bb147 br label %bb1855.outer.outer cond_true1831: ; preds = %bb1855.outer br i1 %tmp1837, label %cond_next1844, label %cond_true1840 cond_true1840: ; preds = %cond_true1831 ret i32 0 cond_next1844: ; preds = %cond_true1831 br i1 false, label %bb1855.outer, label %cond_true1849 cond_true1849: ; preds = %cond_next1844 br label %bb1855.outer.outer bb1855.outer.outer: ; preds = %cond_true1849, %bb1734 %b.10.ph.ph = phi i8* [ null, %cond_true1849 ], [ null, %bb1734 ] ; <i8*> [#uses=1] br label %bb1855.outer bb1855.outer: ; preds = %bb1855.outer.outer, %cond_next1844 %b.10.ph = phi i8* [ null, %cond_next1844 ], [ %b.10.ph.ph, %bb1855.outer.outer ] ; <i8*> [#uses=1] %tmp1837 = icmp eq i8* null, null ; <i1> [#uses=2] br i1 false, label %cond_true1831, label %cond_next1915 cond_next1915: ; preds = %cond_next1961, %bb1855.outer store i8* null, i8** null br i1 %tmp1837, label %cond_next1929, label %cond_true1923 cond_true1923: ; preds = %cond_next1915 ret i32 0 cond_next1929: ; preds = %cond_next1915 br i1 false, label %cond_next1961, label %cond_next2009 cond_next1961: ; preds = %cond_next1929 %tmp1992 = getelementptr i8* %b.10.ph, i32 0 ; <i8*> [#uses=0] br label %cond_next1915 cond_next2009: ; preds = %cond_next1929 ret i32 0 bb5700: ; preds = %bb147 ret i32 0 normal_char: ; preds = %bb147 ret i32 0 }