new testcase

llvm-svn: 8882

llvm/test/Regression/Transforms/Mem2Reg/2003-10-05-DeadPHIInsertion.ll

+; Mem2reg should not insert dead PHI nodes!  The naive algorithm inserts a PHI
+;  node in L3, even though there is no load of %A in anything dominated by L3.
+
+; RUN: llvm-as < %s | opt -mem2reg | llvm-dis | not grep phi
+
+void %test(int %B, bool %C) {
+	%A = alloca int
+	store int %B, int* %A
+	br bool %C, label %L1, label %L2
+L1:
+	store int %B, int* %A
+	%D = load int* %A
+	call void %test(int %D, bool false)
+	br label %L3
+L2:
+	%E = load int* %A
+	call void %test(int %E, bool true)
+	br label %L3
+L3:
+	ret void
+}