1 files changed, 18 insertions, 0 deletions
diff --git a/test/Analysis/BasicAA/2003-02-26-AccessSizeTest.ll b/test/Analysis/BasicAA/2003-02-26-AccessSizeTest.ll
new file mode 100644
index 0000000000000..8ba66df8b99fa
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+++ b/test/Analysis/BasicAA/2003-02-26-AccessSizeTest.ll
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+; This testcase makes sure that size is taken to account when alias analysis 
+; is performed.  It is not legal to delete the second load instruction because
+; the value computed by the first load instruction is changed by the store.
+
+; RUN: llvm-as < %s | opt -gvn -instcombine | llvm-dis | grep DONOTREMOVE
+
+define i32 @test() {
+	%A = alloca i32
+	store i32 0, i32* %A
+    %X = load i32* %A
+    %B = bitcast i32* %A to i8*
+    %C = getelementptr i8* %B, i64 1
+	store i8 1, i8* %C    ; Aliases %A
+    %Y.DONOTREMOVE = load i32* %A
+	%Z = sub i32 %X, %Y.DONOTREMOVE
+    ret i32 %Z
+}
+