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llvm-mirror/test/Regression/Transforms/InstCombine/or.ll
Chris Lattner 6cc64c11a5 New testcase
llvm-svn: 16560
2004-09-28 22:31:49 +00:00

131 lines
2.4 KiB
LLVM

; This test makes sure that these instructions are properly eliminated.
;
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep -v xor | not grep 'or '
implementation
int %test1(int %A) {
%B = or int %A, 0
ret int %B
}
int %test2(int %A) {
%B = or int %A, -1
ret int %B
}
ubyte %test2a(ubyte %A) {
%B = or ubyte %A, 255
ret ubyte %B
}
bool %test3(bool %A) {
%B = or bool %A, false
ret bool %B
}
bool %test4(bool %A) {
%B = or bool %A, true
ret bool %B
}
bool %test5(bool %A) {
%B = or bool %A, %A
ret bool %B
}
int %test6(int %A) {
%B = or int %A, %A
ret int %B
}
int %test7(int %A) { ; A | ~A == -1
%NotA = xor int -1, %A
%B = or int %A, %NotA
ret int %B
}
ubyte %test8(ubyte %A) {
%B = or ubyte %A, 254
%C = or ubyte %B, 1
ret ubyte %C
}
ubyte %test9(ubyte %A, ubyte %B) { ; Test that (A|c1)|(B|c2) == (A|B)|(c1|c2)
%C = or ubyte %A, 1
%D = or ubyte %B, 254
%E = or ubyte %C, %D
ret ubyte %E
}
ubyte %test10(ubyte %A) {
%B = or ubyte %A, 1
%C = and ubyte %B, 254
%D = or ubyte %C, 254 ; (X & C1) | C2 --> (X | C2) & (C1|C2)
ret ubyte %D
}
ubyte %test11(ubyte %A) {
%B = or ubyte %A, 254
%C = xor ubyte %B, 13
%D = or ubyte %C, 1 ; (X ^ C1) | C2 --> (X | C2) ^ (C1&~C2)
%E = xor ubyte %D, 12
ret ubyte %E
}
uint %test12(uint %A) {
%B = or uint %A, 4 ; Should be eliminated
%C = and uint %B, 8
ret uint %C
}
uint %test13(uint %A) {
%B = or uint %A, 12
%C = and uint %B, 8 ; Always equal to 8
ret uint %C
}
bool %test14(uint %A, uint %B) {
%C1 = setlt uint %A, %B
%C2 = setgt uint %A, %B
%D = or bool %C1, %C2 ; (A < B) | (A > B) === A != B
ret bool %D
}
bool %test15(uint %A, uint %B) {
%C1 = setlt uint %A, %B
%C2 = seteq uint %A, %B
%D = or bool %C1, %C2 ; (A < B) | (A == B) === A <= B
ret bool %D
}
int %test16(int %A) {
%B = and int %A, 1
%C = and int %A, -2 ; -2 = ~1
%D = or int %B, %C ; %D = and int %B, -1 == %B
ret int %D
}
int %test17(int %A) {
%B = and int %A, 1
%C = and int %A, 4
%D = or int %B, %C ; %D = and int %B, 5
ret int %D
}
bool %test18(int %A) {
%B = setge int %A, 100
%C = setlt int %A, 50
%D = or bool %B, %C ;; (A-50) >u 50
ret bool %D
}
bool %test19(int %A) {
%B = seteq int %A, 50
%C = seteq int %A, 51
%D = or bool %B, %C ;; (A-50) < 2
ret bool %D
}