Initial testcases for basicaa alias analysis
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3462 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/BasicAA/Makefile b/test/Analysis/BasicAA/Makefile
new file mode 100644
index 0000000..91acd4d
--- /dev/null
+++ b/test/Analysis/BasicAA/Makefile
@@ -0,0 +1,10 @@
+
+LEVEL = ../../../..
+include $(LEVEL)/test/Makefile.tests
+
+TESTS := $(wildcard *.ll)
+
+all:: $(addprefix Output/, $(TESTS:%.ll=%.ll.out))
+
+Output/%.ll.out: %.ll Output/.dir $(LOPT)
+ -$(TESTRUNR) $<
diff --git a/test/Analysis/BasicAA/gcsetest.ll b/test/Analysis/BasicAA/gcsetest.ll
new file mode 100644
index 0000000..f6f7db9
--- /dev/null
+++ b/test/Analysis/BasicAA/gcsetest.ll
@@ -0,0 +1,23 @@
+; Test that GCSE uses basicaa to do alias analysis, which is capable of
+; disambiguating some obvious cases. All loads should be removable in
+; this testcase.
+
+; RUN: if as < %s | opt -basicaa -gcse -instcombine -dce | dis | grep load
+; RUN: then exit 1
+; RUN: else exit 0
+; RUN: fi
+
+%A = global int 7
+%B = global int 8
+implementation
+
+int %test() {
+ %A1 = load int* %A
+
+ store int 123, int* %B ; Store cannot alias %A
+
+ %A2 = load int* %A
+ %X = sub int %A1, %A2
+ ret int %X
+}
+