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58 lines
1.3 KiB
LLVM
58 lines
1.3 KiB
LLVM
; This test makes sure that and instructions are properly eliminated.
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; This test is for Integer BitWidth <= 64 && BitWidth % 8 != 0.
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; RUN: llvm-as < %s | opt -instcombine -disable-output &&
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep 'and '
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define i39 @test0(i39 %A) {
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%B = and i39 %A, 0 ; zero result
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ret i39 %B
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}
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define i47 @test1(i47 %A, i47 %B) {
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;; (~A & ~B) == (~(A | B)) - De Morgan's Law
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%NotA = xor i47 %A, -1
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%NotB = xor i47 %B, -1
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%C1 = and i47 %NotA, %NotB
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ret i47 %C1
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}
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define i15 @test2(i15 %x) {
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%tmp.2 = and i15 %x, -1 ; noop
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ret i15 %tmp.2
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}
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define i23 @test3(i23 %x) {
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%tmp.0 = and i23 %x, 127
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%tmp.2 = and i23 %tmp.0, 128
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ret i23 %tmp.2
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}
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define i1 @test4(i37 %x) {
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%A = and i37 %x, -2147483648
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%B = icmp ne i37 %A, 0
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ret i1 %B
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}
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define i7 @test5(i7 %A, i7* %P) {
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%B = or i7 %A, 3
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%C = xor i7 %B, 12
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store i7 %C, i7* %P
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%r = and i7 %C, 3
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ret i7 %r
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}
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define i7 @test6(i7 %A, i7 %B) {
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;; ~(~X & Y) --> (X | ~Y)
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%t0 = xor i7 %A, -1
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%t1 = and i7 %t0, %B
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%r = xor i7 %t1, -1
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ret i7 %r
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}
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define i47 @test7(i47 %A) {
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%X = ashr i47 %A, 39 ;; sign extend
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%C1 = and i47 %X, 255
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ret i47 %C1
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}
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