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InstCombine: Fold ((A | B) & C1) ^ (B & C2) -> (A & C1) ^ B if C1^C2=-1
[oota-llvm.git]
/
test
/
Transforms
/
InstCombine
/
or-xor.ll
diff --git
a/test/Transforms/InstCombine/or-xor.ll
b/test/Transforms/InstCombine/or-xor.ll
index e2a3baf2f35ac4fd16858f279ebecd434c3b8929..670e3e0fe03f42d29d1a4b4a390ba346fbad9db7 100644
(file)
--- a/
test/Transforms/InstCombine/or-xor.ll
+++ b/
test/Transforms/InstCombine/or-xor.ll
@@
-173,3
+173,11
@@
define i32 @test17(i32 %x, i32 %y) {
; CHECK-NEXT: %xor = xor i32 %x, %y
; CHECK-NEXT: ret i32 %xor
}
+
+define i32 @test18(i32 %a, i32 %b) {
+ %or = xor i32 %a, %b
+ %and1 = and i32 %or, 1
+ %and2 = and i32 %b, -2
+ %xor = or i32 %and1, %and2
+ ret i32 %xor
+}