1 files changed, 56 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/apint-or.ll b/llvm/test/Transforms/InstCombine/apint-or.ll
new file mode 100644
index 00000000000..33304bf8ad6
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/apint-or.ll
@@ -0,0 +1,56 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+; These tests are for Integer BitWidth <= 64 && BitWidth % 2 != 0.
+define i23 @test1(i23 %A) {
+    ;; A | ~A == -1
+    %NotA = xor i23 -1, %A
+    %B = or i23 %A, %NotA
+    ret i23 %B
+; CHECK-LABEL: @test1
+; CHECK-NEXT: ret i23 -1
+}
+
+define i39 @test2(i39 %V, i39 %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 i39 274877906943, -1 ;; C2 = 274877906943
+    %N = and i39 %M, 274877906944
+    %A = add i39 %V, %N
+    %B = and i39 %A, %C1
+    %D = and i39 %V, 274877906943
+    %R = or i39 %B, %D
+    ret i39 %R
+; CHECK-LABEL: @test2
+; CHECK-NEXT: %N = and i39 %M, -274877906944
+; CHECK-NEXT: %A = add i39 %N, %V
+; CHECK-NEXT: ret i39 %A
+}
+
+; These tests are for Integer BitWidth > 64 && BitWidth <= 1024.
+define i1023 @test4(i1023 %A) {
+    ;; A | ~A == -1
+    %NotA = xor i1023 -1, %A
+    %B = or i1023 %A, %NotA
+    ret i1023 %B
+; CHECK-LABEL: @test4
+; CHECK-NEXT: ret i1023 -1
+}
+
+define i399 @test5(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
+; CHECK-LABEL: @test5
+; CHECK-NEXT: %N = and i399 %M, 18446742974197923840
+; CHECK-NEXT: %A = add i399 %N, %V
+; CHECK-NEXT: ret i399 %A
+}
+