1 files changed, 35 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/apint-or2.ll b/test/Transforms/InstCombine/apint-or2.ll
new file mode 100644
index 000000000000..21dc5654ceec
--- /dev/null
+++ b/test/Transforms/InstCombine/apint-or2.ll
@@ -0,0 +1,35 @@
+; This test makes sure that or instructions are properly eliminated.
+; This test is for Integer BitWidth > 64 && BitWidth <= 1024.
+;
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep or
+
+
+define i777 @test0(i777 %X) {
+    %Y = or i777 %X, 0
+    ret i777 %Y
+}
+
+define i117 @test1(i117 %X) {
+    %Y = or i117 %X, -1
+    ret i117 %Y
+} 
+
+define i1023 @test2(i1023 %A) {
+    ;; A | ~A == -1
+    %NotA = xor i1023 -1, %A
+    %B = or i1023 %A, %NotA
+    ret i1023 %B
+}
+
+define i399 @test3(i399 %V, i399 %M) {
+    ;; If we have: ((V + N) & C1) | (V & C2)
+    ;; .. and C2 = ~C1 and C2 is 0+1+ and (N & C2) == 0
+    ;; replace with V+N.
+    %C1 = xor i399 274877906943, -1 ;; C2 = 274877906943
+    %N = and i399 %M, 18446742974197923840
+    %A = add i399 %V, %N
+    %B = and i399 %A, %C1
+    %D = and i399 %V, 274877906943
+    %R = or i399 %B, %D
+    ret i399 %R
+}