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-rw-r--r--test/Transforms/Mem2Reg/2005-11-28-Crash.ll88
1 files changed, 88 insertions, 0 deletions
diff --git a/test/Transforms/Mem2Reg/2005-11-28-Crash.ll b/test/Transforms/Mem2Reg/2005-11-28-Crash.ll
new file mode 100644
index 0000000..1facf21
--- /dev/null
+++ b/test/Transforms/Mem2Reg/2005-11-28-Crash.ll
@@ -0,0 +1,88 @@
+; RUN: llvm-as < %s | opt -mem2reg -disable-output
+; PR670
+
+void %printk(int, ...) {
+entry:
+ %flags = alloca uint ; <uint*> [#uses=2]
+ br bool false, label %then.0, label %endif.0
+
+then.0: ; preds = %entry
+ br label %endif.0
+
+endif.0: ; preds = %then.0, %entry
+ store uint 0, uint* %flags
+ br label %loopentry
+
+loopentry: ; preds = %endif.3, %endif.0
+ br bool false, label %no_exit, label %loopexit
+
+no_exit: ; preds = %loopentry
+ br bool false, label %then.1, label %endif.1
+
+then.1: ; preds = %no_exit
+ br bool false, label %shortcirc_done.0, label %shortcirc_next.0
+
+shortcirc_next.0: ; preds = %then.1
+ br label %shortcirc_done.0
+
+shortcirc_done.0: ; preds = %shortcirc_next.0, %then.1
+ br bool false, label %shortcirc_done.1, label %shortcirc_next.1
+
+shortcirc_next.1: ; preds = %shortcirc_done.0
+ br label %shortcirc_done.1
+
+shortcirc_done.1: ; preds = %shortcirc_next.1, %shortcirc_done.0
+ br bool false, label %shortcirc_done.2, label %shortcirc_next.2
+
+shortcirc_next.2: ; preds = %shortcirc_done.1
+ br label %shortcirc_done.2
+
+shortcirc_done.2: ; preds = %shortcirc_next.2, %shortcirc_done.1
+ br bool false, label %then.2, label %endif.2
+
+then.2: ; preds = %shortcirc_done.2
+ br label %endif.2
+
+endif.2: ; preds = %then.2, %shortcirc_done.2
+ br label %endif.1
+
+endif.1: ; preds = %endif.2, %no_exit
+ br bool false, label %then.3, label %endif.3
+
+then.3: ; preds = %endif.1
+ br label %endif.3
+
+endif.3: ; preds = %then.3, %endif.1
+ br label %loopentry
+
+loopexit: ; preds = %loopentry
+ br label %endif.4
+
+then.4: ; No predecessors!
+ %tmp.61 = load uint* %flags ; <uint> [#uses=0]
+ br label %out
+
+dead_block_after_goto: ; No predecessors!
+ br label %endif.4
+
+endif.4: ; preds = %dead_block_after_goto, %loopexit
+ br bool false, label %then.5, label %else
+
+then.5: ; preds = %endif.4
+ br label %endif.5
+
+else: ; preds = %endif.4
+ br label %endif.5
+
+endif.5: ; preds = %else, %then.5
+ br label %out
+
+out: ; preds = %endif.5, %then.4
+ br label %return
+
+after_ret: ; No predecessors!
+ br label %return
+
+return: ; preds = %after_ret, %out
+ ret void
+}