Add regression tests (WORKSFORME)

- These tests wont't crash on trunk but would be better to add them so that
  they don't break again in the future.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176369 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/X86/pr11998.ll

@@ -0,0 +1,18 @@
+; RUN: llc < %s -mcpu=corei7-avx -march=x86-64 -mattr=+avx
+
+define void @autogen_51367_5000(i8) {
+BB:
+  %B = srem i8 55, %0
+  %B9 = shl i8 %B, %B
+  br label %CF
+
+CF:                                               ; preds = %CF, %BB
+  br i1 undef, label %CF, label %CF403
+
+CF403:                                            ; preds = %CF403, %CF
+  %S44 = icmp eq i8 %B9, %0
+  br i1 %S44, label %CF403, label %CF405
+
+CF405:                                            ; preds = %CF405, %CF403
+  br label %CF405
+}