| ; This test makes sure that these instructions are properly eliminated. |
| ; |
| |
| ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep select |
| |
| implementation |
| |
| int %test1(int %A, int %B) { |
| %C = select bool false, int %A, int %B |
| ret int %C |
| } |
| |
| int %test2(int %A, int %B) { |
| %C = select bool true, int %A, int %B |
| ret int %C |
| } |
| |
| int %test3(bool %C, int %I) { |
| %V = select bool %C, int %I, int %I ; V = I |
| ret int %V |
| } |
| |
| bool %test4(bool %C) { |
| %V = select bool %C, bool true, bool false ; V = C |
| ret bool %V |
| } |
| |
| bool %test5(bool %C) { |
| %V = select bool %C, bool false, bool true ; V = !C |
| ret bool %V |
| } |
| |
| int %test6(bool %C) { |
| %V = select bool %C, int 1, int 0 ; V = cast C to int |
| ret int %V |
| } |
| |
| bool %test7(bool %C, bool %X) { |
| %R = select bool %C, bool true, bool %X ; R = or C, X |
| ret bool %R |
| } |
| |
| bool %test8(bool %C, bool %X) { |
| %R = select bool %C, bool %X, bool false ; R = and C, X |
| ret bool %R |
| } |
| |
| bool %test9(bool %C, bool %X) { |
| %R = select bool %C, bool false, bool %X ; R = and !C, X |
| ret bool %R |
| } |
| |
| bool %test10(bool %C, bool %X) { |
| %R = select bool %C, bool %X, bool true ; R = or !C, X |
| ret bool %R |
| } |
| |
| int %test11(int %a) { |
| %C = seteq int %a, 0 |
| %R = select bool %C, int 0, int 1 |
| ret int %R |
| } |
| |
| int %test12(bool %cond, int %a) { |
| %b = or int %a, 1 |
| %c = select bool %cond, int %b, int %a |
| ret int %c |
| } |
| |
| int %test12a(bool %cond, int %a) { |
| %b = shr int %a, ubyte 1 |
| %c = select bool %cond, int %b, int %a |
| ret int %c |
| } |
| |
| int %test12b(bool %cond, int %a) { |
| %b = shr int %a, ubyte 1 |
| %c = select bool %cond, int %a, int %b |
| ret int %c |
| } |
| |
| int %test13(int %a, int %b) { |
| %C = seteq int %a, %b |
| %V = select bool %C, int %a, int %b |
| ret int %V |
| } |
| |
| int %test13a(int %a, int %b) { |
| %C = setne int %a, %b |
| %V = select bool %C, int %a, int %b |
| ret int %V |
| } |
| |
| int %test13b(int %a, int %b) { |
| %C = seteq int %a, %b |
| %V = select bool %C, int %b, int %a |
| ret int %V |
| } |
| |
| bool %test14a(bool %C, int %X) { |
| %V = select bool %C, int %X, int 0 |
| %R = setlt int %V, 1 ; (X < 1) | !C |
| ret bool %R |
| } |
| |
| bool %test14b(bool %C, int %X) { |
| %V = select bool %C, int 0, int %X |
| %R = setlt int %V, 1 ; (X < 1) | C |
| ret bool %R |
| } |
| |
| int %test15a(int %X) { ;; Code sequence for (X & 16) ? 16 : 0 |
| %t1 = and int %X, 16 |
| %t2 = seteq int %t1, 0 |
| %t3 = select bool %t2, int 0, int 16 ;; X & 16 |
| ret int %t3 |
| } |
| |
| int %test15b(int %X) { ;; Code sequence for (X & 32) ? 0 : 24 |
| %t1 = and int %X, 32 |
| %t2 = seteq int %t1, 0 |
| %t3 = select bool %t2, int 32, int 0 ;; ~X & 32 |
| ret int %t3 |
| } |
| |
| int %test15c(int %X) { ;; Alternate code sequence for (X & 16) ? 16 : 0 |
| %t1 = and int %X, 16 |
| %t2 = seteq int %t1, 16 |
| %t3 = select bool %t2, int 16, int 0 ;; X & 16 |
| ret int %t3 |
| } |
| |
| int %test15d(int %X) { ;; Alternate code sequence for (X & 16) ? 16 : 0 |
| %t1 = and int %X, 16 |
| %t2 = setne int %t1, 0 |
| %t3 = select bool %t2, int 16, int 0 ;; X & 16 |
| ret int %t3 |
| } |
| |
| int %test16(bool %C, int* %P) { |
| %P2 = select bool %C, int* %P, int* null |
| %V = load int* %P2 |
| ret int %V |
| } |
| |
| bool %test17(int* %X, bool %C) { |
| %R = select bool %C, int* %X, int* null |
| %RV = seteq int* %R, null |
| ret bool %RV |
| } |