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5640f33331
* A & ~A == 0 * A / (2^c) == A >> c if unsigned * 0 / A == 0 * 1.0 * A == A * A * (2^c) == A << c * A ^ ~A == -1 * A | ~A == -1 * 0 % X = 0 * A % (2^c) == A & (c-1) if unsigned * A - (A & B) == A & ~B * -1 - A == ~A git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5588 91177308-0d34-0410-b5e6-96231b3b80d8
72 lines
1.0 KiB
LLVM
72 lines
1.0 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
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;
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; RUN: if as < %s | opt -instcombine | dis | grep or\
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; RUN: then exit 1
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; RUN: else exit 0
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; RUN: fi
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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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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 = xor bool %A, false
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ret bool %B
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}
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int %test6(int %A) {
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%B = xor int %A, 0
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ret int %B
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}
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bool %test7(bool %A) {
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%B = xor bool %A, %A
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ret bool %B
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}
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int %test8(int %A) {
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%B = xor int %A, %A
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ret int %B
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}
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bool %test9(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 %test10(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 %test11(int %A) { ; A ^ ~A == -1
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%NotA = xor int -1, %A
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%B = xor int %A, %NotA
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ret int %B
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}
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int %test12(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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