mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-07 01:54:50 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47793 91177308-0d34-0410-b5e6-96231b3b80d8
172 lines
5.0 KiB
LLVM
172 lines
5.0 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
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;
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
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; RUN: grep -v xor | not grep {or }
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; END.
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define i32 @test1(i32 %A) {
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%B = or i32 %A, 0 ; <i32> [#uses=1]
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ret i32 %B
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}
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define i32 @test2(i32 %A) {
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%B = or i32 %A, -1 ; <i32> [#uses=1]
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ret i32 %B
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}
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define i8 @test2a(i8 %A) {
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%B = or i8 %A, -1 ; <i8> [#uses=1]
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ret i8 %B
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}
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define i1 @test3(i1 %A) {
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%B = or i1 %A, false ; <i1> [#uses=1]
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ret i1 %B
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}
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define i1 @test4(i1 %A) {
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%B = or i1 %A, true ; <i1> [#uses=1]
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ret i1 %B
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}
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define i1 @test5(i1 %A) {
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%B = or i1 %A, %A ; <i1> [#uses=1]
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ret i1 %B
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}
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define i32 @test6(i32 %A) {
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%B = or i32 %A, %A ; <i32> [#uses=1]
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ret i32 %B
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}
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; A | ~A == -1
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define i32 @test7(i32 %A) {
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%NotA = xor i32 -1, %A ; <i32> [#uses=1]
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%B = or i32 %A, %NotA ; <i32> [#uses=1]
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ret i32 %B
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}
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define i8 @test8(i8 %A) {
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%B = or i8 %A, -2 ; <i8> [#uses=1]
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%C = or i8 %B, 1 ; <i8> [#uses=1]
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ret i8 %C
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}
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; Test that (A|c1)|(B|c2) == (A|B)|(c1|c2)
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define i8 @test9(i8 %A, i8 %B) {
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%C = or i8 %A, 1 ; <i8> [#uses=1]
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%D = or i8 %B, -2 ; <i8> [#uses=1]
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%E = or i8 %C, %D ; <i8> [#uses=1]
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ret i8 %E
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}
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define i8 @test10(i8 %A) {
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%B = or i8 %A, 1 ; <i8> [#uses=1]
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%C = and i8 %B, -2 ; <i8> [#uses=1]
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; (X & C1) | C2 --> (X | C2) & (C1|C2)
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%D = or i8 %C, -2 ; <i8> [#uses=1]
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ret i8 %D
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}
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define i8 @test11(i8 %A) {
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%B = or i8 %A, -2 ; <i8> [#uses=1]
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%C = xor i8 %B, 13 ; <i8> [#uses=1]
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; (X ^ C1) | C2 --> (X | C2) ^ (C1&~C2)
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%D = or i8 %C, 1 ; <i8> [#uses=1]
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%E = xor i8 %D, 12 ; <i8> [#uses=1]
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ret i8 %E
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}
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define i32 @test12(i32 %A) {
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; Should be eliminated
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%B = or i32 %A, 4 ; <i32> [#uses=1]
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%C = and i32 %B, 8 ; <i32> [#uses=1]
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ret i32 %C
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}
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define i32 @test13(i32 %A) {
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%B = or i32 %A, 12 ; <i32> [#uses=1]
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; Always equal to 8
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%C = and i32 %B, 8 ; <i32> [#uses=1]
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ret i32 %C
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}
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define i1 @test14(i32 %A, i32 %B) {
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%C1 = icmp ult i32 %A, %B ; <i1> [#uses=1]
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%C2 = icmp ugt i32 %A, %B ; <i1> [#uses=1]
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; (A < B) | (A > B) === A != B
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%D = or i1 %C1, %C2 ; <i1> [#uses=1]
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ret i1 %D
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}
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define i1 @test15(i32 %A, i32 %B) {
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%C1 = icmp ult i32 %A, %B ; <i1> [#uses=1]
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%C2 = icmp eq i32 %A, %B ; <i1> [#uses=1]
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; (A < B) | (A == B) === A <= B
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%D = or i1 %C1, %C2 ; <i1> [#uses=1]
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ret i1 %D
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}
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define i32 @test16(i32 %A) {
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%B = and i32 %A, 1 ; <i32> [#uses=1]
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; -2 = ~1
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%C = and i32 %A, -2 ; <i32> [#uses=1]
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; %D = and int %B, -1 == %B
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%D = or i32 %B, %C ; <i32> [#uses=1]
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ret i32 %D
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}
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define i32 @test17(i32 %A) {
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%B = and i32 %A, 1 ; <i32> [#uses=1]
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%C = and i32 %A, 4 ; <i32> [#uses=1]
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; %D = and int %B, 5
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%D = or i32 %B, %C ; <i32> [#uses=1]
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ret i32 %D
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}
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define i1 @test18(i32 %A) {
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%B = icmp sge i32 %A, 100 ; <i1> [#uses=1]
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%C = icmp slt i32 %A, 50 ; <i1> [#uses=1]
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;; (A-50) >u 50
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%D = or i1 %B, %C ; <i1> [#uses=1]
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ret i1 %D
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}
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define i1 @test19(i32 %A) {
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%B = icmp eq i32 %A, 50 ; <i1> [#uses=1]
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%C = icmp eq i32 %A, 51 ; <i1> [#uses=1]
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;; (A-50) < 2
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%D = or i1 %B, %C ; <i1> [#uses=1]
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ret i1 %D
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}
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define i32 @test20(i32 %x) {
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%y = and i32 %x, 123 ; <i32> [#uses=1]
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%z = or i32 %y, %x ; <i32> [#uses=1]
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ret i32 %z
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}
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define i32 @test21(i32 %tmp.1) {
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%tmp.1.mask1 = add i32 %tmp.1, 2 ; <i32> [#uses=1]
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%tmp.3 = and i32 %tmp.1.mask1, -2 ; <i32> [#uses=1]
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%tmp.5 = and i32 %tmp.1, 1 ; <i32> [#uses=1]
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;; add tmp.1, 2
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%tmp.6 = or i32 %tmp.5, %tmp.3 ; <i32> [#uses=1]
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ret i32 %tmp.6
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}
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define i32 @test22(i32 %B) {
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%ELIM41 = and i32 %B, 1 ; <i32> [#uses=1]
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%ELIM7 = and i32 %B, -2 ; <i32> [#uses=1]
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%ELIM5 = or i32 %ELIM41, %ELIM7 ; <i32> [#uses=1]
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ret i32 %ELIM5
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}
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define i16 @test23(i16 %A) {
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%B = lshr i16 %A, 1 ; <i16> [#uses=1]
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;; fold or into xor
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%C = or i16 %B, -32768 ; <i16> [#uses=1]
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%D = xor i16 %C, 8193 ; <i16> [#uses=1]
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ret i16 %D
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}
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