Fix a bug where CodeGen would attempt to erase an instruction that was 
already used.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46519 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/boolassign.c b/test/CodeGen/boolassign.c
new file mode 100644
index 0000000..7f76a92
--- /dev/null
+++ b/test/CodeGen/boolassign.c
@@ -0,0 +1,6 @@
+// RUN: clang %s -emit-llvm
+
+int testBoolAssign(void) {
+int ss;
+if ((ss = ss && ss)) {}
+}