Test the mod/ref analysis in DSA.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12333 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Analysis/DSGraph/2004-03-10-ElimLoad.ll b/test/Analysis/DSGraph/2004-03-10-ElimLoad.ll
new file mode 100644 (file)
index 0000000..1ae0a48
--- /dev/null
+++ b/test/Analysis/DSGraph/2004-03-10-ElimLoad.ll
@@ -0,0 +1,13 @@
+; RUN: llvm-as < %s | opt -ds-aa -load-vn -gcse -instcombine | llvm-dis | not grep sub
+
+void %bar(int* %p) {
+  ret void
+}
+
+int %foo(int* %a) {
+  %b = load int* %a
+  call void %bar(int* %a)
+  %d = load int* %a
+  %e = sub int %b, %d
+  ret int %e
+}

diff --git a/test/Analysis/DSGraph/2004-03-10-NoElimLoad.ll b/test/Analysis/DSGraph/2004-03-10-NoElimLoad.ll
new file mode 100644 (file)
index 0000000..3a8e540
--- /dev/null
+++ b/test/Analysis/DSGraph/2004-03-10-NoElimLoad.ll
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | opt -ds-aa -load-vn -gcse -instcombine | llvm-dis | grep sub
+
+void %bar(int* %p) {
+  store int 15, int* %p
+  ret void
+}
+
+int %foo(int* %a) {
+  %b = load int* %a
+  call void %bar(int* %a)
+  %d = load int* %a
+  %e = sub int %b, %d
+  ret int %e
+}