New testcase for better mod/ref information that basicaa can provide

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11023 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Analysis/BasicAA/2004-01-29-InvariantMemory.llx b/test/Analysis/BasicAA/2004-01-29-InvariantMemory.llx
new file mode 100644 (file)
index 0000000..cfc4c48
--- /dev/null
+++ b/test/Analysis/BasicAA/2004-01-29-InvariantMemory.llx
@@ -0,0 +1,12 @@
+; RUN: llvm-as < %s | opt -load-vn -gcse -instcombine | llvm-dis | not grep load
+
+%X = constant [2 x int] [int 4, int 5]
+
+int %test(int* %Y, long %idx) {
+        %P = getelementptr [2 x int]* %X, long 0, long %idx
+       %A = load int* %P      ; Load from invariant memory
+       store int 4, int* %Y   ; Store could not be to %X
+       %B = load int* %P
+       %C = sub int %A, %B
+       ret int %C
+}

diff --git a/test/Transforms/BasicAA/2004-01-29-InvariantMemory.llx b/test/Transforms/BasicAA/2004-01-29-InvariantMemory.llx
new file mode 100644 (file)
index 0000000..cfc4c48
--- /dev/null
+++ b/test/Transforms/BasicAA/2004-01-29-InvariantMemory.llx
@@ -0,0 +1,12 @@
+; RUN: llvm-as < %s | opt -load-vn -gcse -instcombine | llvm-dis | not grep load
+
+%X = constant [2 x int] [int 4, int 5]
+
+int %test(int* %Y, long %idx) {
+        %P = getelementptr [2 x int]* %X, long 0, long %idx
+       %A = load int* %P      ; Load from invariant memory
+       store int 4, int* %Y   ; Store could not be to %X
+       %B = load int* %P
+       %C = sub int %A, %B
+       ret int %C
+}