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https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8558 91177308-0d34-0410-b5e6-96231b3b80d8
116 lines
2.1 KiB
LLVM
116 lines
2.1 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
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;
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep -v xor | not grep 'or '
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implementation
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int %test1(int %A) {
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%B = or int %A, 0
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ret int %B
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}
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int %test2(int %A) {
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%B = or int %A, -1
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ret int %B
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}
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ubyte %test2a(ubyte %A) {
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%B = or ubyte %A, 255
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ret ubyte %B
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}
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bool %test3(bool %A) {
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%B = or bool %A, false
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ret bool %B
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}
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bool %test4(bool %A) {
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%B = or bool %A, true
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ret bool %B
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}
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bool %test5(bool %A) {
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%B = or bool %A, %A
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ret bool %B
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}
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int %test6(int %A) {
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%B = or int %A, %A
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ret int %B
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}
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int %test7(int %A) { ; A | ~A == -1
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%NotA = xor int -1, %A
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%B = or int %A, %NotA
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ret int %B
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}
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ubyte %test8(ubyte %A) {
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%B = or ubyte %A, 254
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%C = or ubyte %B, 1
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ret ubyte %C
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}
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ubyte %test9(ubyte %A, ubyte %B) { ; Test that (A|c1)|(B|c2) == (A|B)|(c1|c2)
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%C = or ubyte %A, 1
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%D = or ubyte %B, 254
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%E = or ubyte %C, %D
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ret ubyte %E
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}
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ubyte %test10(ubyte %A) {
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%B = or ubyte %A, 1
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%C = and ubyte %B, 254
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%D = or ubyte %C, 254 ; (X & C1) | C2 --> (X | C2) & (C1|C2)
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ret ubyte %D
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}
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ubyte %test11(ubyte %A) {
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%B = or ubyte %A, 254
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%C = xor ubyte %B, 13
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%D = or ubyte %C, 1 ; (X ^ C1) | C2 --> (X | C2) ^ (C1&~C2)
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%E = xor ubyte %D, 12
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ret ubyte %E
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}
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uint %test12(uint %A) {
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%B = or uint %A, 4 ; Should be eliminated
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%C = and uint %B, 8
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ret uint %C
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}
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uint %test13(uint %A) {
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%B = or uint %A, 12
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%C = and uint %B, 8 ; Always equal to 8
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ret uint %C
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}
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bool %test14(uint %A, uint %B) {
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%C1 = setlt uint %A, %B
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%C2 = setgt uint %A, %B
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%D = or bool %C1, %C2 ; (A < B) | (A > B) === A != B
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ret bool %D
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}
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bool %test15(uint %A, uint %B) {
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%C1 = setlt uint %A, %B
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%C2 = seteq uint %A, %B
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%D = or bool %C1, %C2 ; (A < B) | (A == B) === A <= B
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ret bool %D
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}
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int %test16(int %A) {
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%B = and int %A, 1
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%C = and int %A, -2 ; -2 = ~1
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%D = or int %B, %C ; %D = and int %B, -1 == %B
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ret int %D
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}
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int %test17(int %A) {
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%B = and int %A, 1
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%C = and int %A, 4
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%D = or int %B, %C ; %D = and int %B, 5
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ret int %D
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}
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