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llvm-mirror/test/Regression/Transforms/InstCombine/set.ll

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; This test makes sure that these instructions are properly eliminated.
;
; RUN: as < %s | opt -instcombine | dis | not grep set
%X = uninitialized global int
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bool %test1(int %A) {
%B = seteq int %A, %A
%C = seteq int* %X, null ; Never true
%D = and bool %B, %C
ret bool %D
}
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bool %test2(int %A) {
%B = setne int %A, %A
%C = setne int* %X, null ; Never false
%D = or bool %B, %C
ret bool %D
}
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bool %test3(int %A) {
%B = setlt int %A, %A
ret bool %B
}
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bool %test4(int %A) {
%B = setgt int %A, %A
ret bool %B
}
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bool %test5(int %A) {
%B = setle int %A, %A
ret bool %B
}
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bool %test6(int %A) {
%B = setge int %A, %A
ret bool %B
}
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bool %test7(uint %A) {
%B = setge uint %A, 0 ; true
ret bool %B
}
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bool %test8(uint %A) {
%B = setlt uint %A, 0 ; false
ret bool %B
}
;; test operations on boolean values these should all be eliminated$a
bool %test9(bool %A) {
%B = setlt bool %A, false ; false
ret bool %B
}
bool %test10(bool %A) {
%B = setgt bool %A, true ; false
ret bool %B
}
bool %test11(bool %A) {
%B = setle bool %A, true ; true
ret bool %B
}
bool %test12(bool %A) {
%B = setge bool %A, false ; true
ret bool %B
}
bool %test13(bool %A, bool %B) {
%C = setge bool %A, %B ; A | ~B
ret bool %C
}
bool %test14(bool %A, bool %B) {
%C = seteq bool %A, %B ; ~(A ^ B)
ret bool %C
}
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bool %test16(uint %A) {
%B = and uint %A, 5
%C = seteq uint %B, 8 ; Is never true
ret bool %C
}
bool %test17(ubyte %A) {
%B = or ubyte %A, 1
%C = seteq ubyte %B, 2 ; Always false
ret bool %C
}