; This test makes sure that these instructions are properly eliminated.
;
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
+; RUN: grep -v xor | not grep {or }
+; END.
-; RUN: if as < %s | opt -instcombine -dce | dis | grep or
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
+define i32 @test1(i32 %A) {
+ %B = or i32 %A, 0 ; <i32> [#uses=1]
+ ret i32 %B
+}
+
+define i32 @test2(i32 %A) {
+ %B = or i32 %A, -1 ; <i32> [#uses=1]
+ ret i32 %B
+}
+
+define i8 @test2a(i8 %A) {
+ %B = or i8 %A, -1 ; <i8> [#uses=1]
+ ret i8 %B
+}
+
+define i1 @test3(i1 %A) {
+ %B = or i1 %A, false ; <i1> [#uses=1]
+ ret i1 %B
+}
+
+define i1 @test4(i1 %A) {
+ %B = or i1 %A, true ; <i1> [#uses=1]
+ ret i1 %B
+}
+
+define i1 @test5(i1 %A) {
+ %B = or i1 %A, %A ; <i1> [#uses=1]
+ ret i1 %B
+}
+
+define i32 @test6(i32 %A) {
+ %B = or i32 %A, %A ; <i32> [#uses=1]
+ ret i32 %B
+}
+
+; A | ~A == -1
+define i32 @test7(i32 %A) {
+ %NotA = xor i32 -1, %A ; <i32> [#uses=1]
+ %B = or i32 %A, %NotA ; <i32> [#uses=1]
+ ret i32 %B
+}
+
+define i8 @test8(i8 %A) {
+ %B = or i8 %A, -2 ; <i8> [#uses=1]
+ %C = or i8 %B, 1 ; <i8> [#uses=1]
+ ret i8 %C
+}
+
+; Test that (A|c1)|(B|c2) == (A|B)|(c1|c2)
+define i8 @test9(i8 %A, i8 %B) {
+ %C = or i8 %A, 1 ; <i8> [#uses=1]
+ %D = or i8 %B, -2 ; <i8> [#uses=1]
+ %E = or i8 %C, %D ; <i8> [#uses=1]
+ ret i8 %E
+}
+
+define i8 @test10(i8 %A) {
+ %B = or i8 %A, 1 ; <i8> [#uses=1]
+ %C = and i8 %B, -2 ; <i8> [#uses=1]
+ ; (X & C1) | C2 --> (X | C2) & (C1|C2)
+ %D = or i8 %C, -2 ; <i8> [#uses=1]
+ ret i8 %D
+}
+
+define i8 @test11(i8 %A) {
+ %B = or i8 %A, -2 ; <i8> [#uses=1]
+ %C = xor i8 %B, 13 ; <i8> [#uses=1]
+ ; (X ^ C1) | C2 --> (X | C2) ^ (C1&~C2)
+ %D = or i8 %C, 1 ; <i8> [#uses=1]
+ %E = xor i8 %D, 12 ; <i8> [#uses=1]
+ ret i8 %E
+}
+
+define i32 @test12(i32 %A) {
+ ; Should be eliminated
+ %B = or i32 %A, 4 ; <i32> [#uses=1]
+ %C = and i32 %B, 8 ; <i32> [#uses=1]
+ ret i32 %C
+}
+
+define i32 @test13(i32 %A) {
+ %B = or i32 %A, 12 ; <i32> [#uses=1]
+ ; Always equal to 8
+ %C = and i32 %B, 8 ; <i32> [#uses=1]
+ ret i32 %C
+}
+
+define i1 @test14(i32 %A, i32 %B) {
+ %C1 = icmp ult i32 %A, %B ; <i1> [#uses=1]
+ %C2 = icmp ugt i32 %A, %B ; <i1> [#uses=1]
+ ; (A < B) | (A > B) === A != B
+ %D = or i1 %C1, %C2 ; <i1> [#uses=1]
+ ret i1 %D
+}
-implementation
+define i1 @test15(i32 %A, i32 %B) {
+ %C1 = icmp ult i32 %A, %B ; <i1> [#uses=1]
+ %C2 = icmp eq i32 %A, %B ; <i1> [#uses=1]
+ ; (A < B) | (A == B) === A <= B
+ %D = or i1 %C1, %C2 ; <i1> [#uses=1]
+ ret i1 %D
+}
-int "test1"(int %A) {
- %B = or int %A, 0
- ret int %B
+define i32 @test16(i32 %A) {
+ %B = and i32 %A, 1 ; <i32> [#uses=1]
+ ; -2 = ~1
+ %C = and i32 %A, -2 ; <i32> [#uses=1]
+ ; %D = and int %B, -1 == %B
+ %D = or i32 %B, %C ; <i32> [#uses=1]
+ ret i32 %D
}
-int "test2"(int %A) {
- %B = or int %A, -1
- ret int %B
+define i32 @test17(i32 %A) {
+ %B = and i32 %A, 1 ; <i32> [#uses=1]
+ %C = and i32 %A, 4 ; <i32> [#uses=1]
+ ; %D = and int %B, 5
+ %D = or i32 %B, %C ; <i32> [#uses=1]
+ ret i32 %D
}
-bool "test3"(bool %A) {
- %B = or bool %A, false
- ret bool %B
+define i1 @test18(i32 %A) {
+ %B = icmp sge i32 %A, 100 ; <i1> [#uses=1]
+ %C = icmp slt i32 %A, 50 ; <i1> [#uses=1]
+ ;; (A-50) >u 50
+ %D = or i1 %B, %C ; <i1> [#uses=1]
+ ret i1 %D
}
-bool "test4"(bool %A) {
- %B = or bool %A, true
- ret bool %B
+define i1 @test19(i32 %A) {
+ %B = icmp eq i32 %A, 50 ; <i1> [#uses=1]
+ %C = icmp eq i32 %A, 51 ; <i1> [#uses=1]
+ ;; (A-50) < 2
+ %D = or i1 %B, %C ; <i1> [#uses=1]
+ ret i1 %D
}
-bool "test5"(bool %A) {
- %B = xor bool %A, false
- ret bool %B
+define i32 @test20(i32 %x) {
+ %y = and i32 %x, 123 ; <i32> [#uses=1]
+ %z = or i32 %y, %x ; <i32> [#uses=1]
+ ret i32 %z
}
-int "test5"(int %A) {
- %B = xor int %A, 0
- ret int %B
+define i32 @test21(i32 %tmp.1) {
+ %tmp.1.mask1 = add i32 %tmp.1, 2 ; <i32> [#uses=1]
+ %tmp.3 = and i32 %tmp.1.mask1, -2 ; <i32> [#uses=1]
+ %tmp.5 = and i32 %tmp.1, 1 ; <i32> [#uses=1]
+ ;; add tmp.1, 2
+ %tmp.6 = or i32 %tmp.5, %tmp.3 ; <i32> [#uses=1]
+ ret i32 %tmp.6
}
+define i32 @test22(i32 %B) {
+ %ELIM41 = and i32 %B, 1 ; <i32> [#uses=1]
+ %ELIM7 = and i32 %B, -2 ; <i32> [#uses=1]
+ %ELIM5 = or i32 %ELIM41, %ELIM7 ; <i32> [#uses=1]
+ ret i32 %ELIM5
+}
+define i16 @test23(i16 %A) {
+ %B = lshr i16 %A, 1 ; <i16> [#uses=1]
+ ;; fold or into xor
+ %C = or i16 %B, -32768 ; <i16> [#uses=1]
+ %D = xor i16 %C, 8193 ; <i16> [#uses=1]
+ ret i16 %D
+}
projects / oota-llvm.git / blobdiff