New test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40023 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopUnswitch/2007-07-18-DomInfo.ll b/test/Transforms/LoopUnswitch/2007-07-18-DomInfo.ll
new file mode 100644 (file)
index 0000000..9c2f938
--- /dev/null
+++ b/test/Transforms/LoopUnswitch/2007-07-18-DomInfo.ll
@@ -0,0 +1,66 @@
+; 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
+}
\ No newline at end of file