Add a new test for basicaa

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

diff --git a/test/Analysis/BasicAA/featuretest.ll b/test/Analysis/BasicAA/featuretest.ll
index 6884df2db51d24fa0cacdcdd9da2d6d46ddea8eb..cd57ef1a79ae1039f228d8fba3e5483cf278de14 100644 (file)
--- 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 6884df2db51d24fa0cacdcdd9da2d6d46ddea8eb..cd57ef1a79ae1039f228d8fba3e5483cf278de14 100644 (file)
--- 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
+}