Add a new test for basicaa

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5625 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 22 insertions, 0 deletions

diff --git a/test/Analysis/BasicAA/featuretest.ll b/test/Analysis/BasicAA/featuretest.ll
index 6884df2db5..cd57ef1a79 100644
--- a/test/Analysis/BasicAA/featuretest.ll
+++ b/test/Analysis/BasicAA/featuretest.ll
@@ -51,3 +51,14 @@ int %gep_distance_test(int* %A) {
         ret int %r
 }
 
+; Test that if two pointers are spaced out by a constant offset, that they
+; cannot alias, even if there is a variable offset between them...
+int %gep_distance_test2({int,int}* %A, long %distance) {
+	%A = getelementptr {int,int}* %A, long 0, ubyte 0
+	%REMOVEu = load int* %A
+	%B = getelementptr {int,int}* %A, long %distance, ubyte 1
+	store int 7, int* %B    ; B cannot alias A, it's at least 4 bytes away
+	%REMOVEv = load int* %A
+        %r = sub int %REMOVEu, %REMOVEv
+        ret int %r
+}
diff --git a/test/Transforms/BasicAA/featuretest.ll b/test/Transforms/BasicAA/featuretest.ll
index 6884df2db5..cd57ef1a79 100644
--- a/test/Transforms/BasicAA/featuretest.ll
+++ b/test/Transforms/BasicAA/featuretest.ll
@@ -51,3 +51,14 @@ int %gep_distance_test(int* %A) {
         ret int %r
 }
 
+; Test that if two pointers are spaced out by a constant offset, that they
+; cannot alias, even if there is a variable offset between them...
+int %gep_distance_test2({int,int}* %A, long %distance) {
+	%A = getelementptr {int,int}* %A, long 0, ubyte 0
+	%REMOVEu = load int* %A
+	%B = getelementptr {int,int}* %A, long %distance, ubyte 1
+	store int 7, int* %B    ; B cannot alias A, it's at least 4 bytes away
+	%REMOVEv = load int* %A
+        %r = sub int %REMOVEu, %REMOVEv
+        ret int %r
+}