mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7298 91177308-0d34-0410-b5e6-96231b3b80d8
91 lines
1.7 KiB
LLVM
91 lines
1.7 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
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;
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; RUN: as < %s | opt -instcombine | dis | not grep and
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implementation
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int %test1(int %A) {
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%B = and int %A, 0 ; zero result
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ret int %B
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}
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int %test2(int %A) {
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%B = and int %A, -1 ; noop
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ret int %B
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}
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bool %test3(bool %A) {
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%B = and bool %A, false ; always = 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 = and bool %A, true ; noop
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ret bool %B
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}
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int %test5(int %A) {
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%B = and int %A, %A
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ret int %B
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}
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bool %test6(bool %A) {
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%B = and bool %A, %A
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ret bool %B
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}
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int %test7(int %A) { ; A & ~A == 0
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%NotA = xor int %A, -1
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%B = and int %A, %NotA
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ret int %B
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}
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ubyte %test8(ubyte %A) { ; AND associates
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%B = and ubyte %A, 3
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%C = and ubyte %B, 4
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ret ubyte %C
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}
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bool %test9(int %A) {
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%B = and int %A, -2147483648 ; Test of sign bit, convert to setle %A, 0
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%C = cast int %B to bool
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ret bool %C
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}
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bool %test9(uint %A) {
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%B = and uint %A, 2147483648 ; Test of sign bit, convert to setle %A, 0
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%C = cast uint %B to bool
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ret bool %C
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}
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uint %test10(uint %A) {
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%B = and uint %A, 12
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%C = xor uint %B, 15
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%D = and uint %C, 1 ; (X ^ C1) & C2 --> (X & C2) ^ (C1&C2)
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ret uint %D
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}
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uint %test11(uint %A, uint* %P) {
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%B = or uint %A, 3
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%C = xor uint %B, 12
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store uint %C, uint* %P ; additional use of C
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%D = and uint %C, 3 ; %C = and uint %B, 3 --> 3
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ret uint %D
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}
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bool %test12(uint %A, uint %B) {
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%C1 = setlt uint %A, %B
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%C2 = setle uint %A, %B
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%D = and 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 %test13(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 = and bool %C1, %C2 ; (A < B) & (A > B) === false
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ret bool %D
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}
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