1 ; This test makes sure that these instructions are properly eliminated.
4 ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep -v 'sub int %Cok, %Bok' | not grep sub
9 %B = sub int %A, %A ; ISA constant 0
19 %B = sub int 0, %A ; B = -A
20 %C = sub int 0, %B ; C = -B = A
24 int %test4(int %A, int %x) {
30 int %test5(int %A, int %Bok, int %Cok) {
31 %D = sub int %Bok, %Cok
36 int %test6(int %A, int %B) {
37 %C = and int %A, %B ; A - (A & B) => A & ~B
43 %B = sub int -1, %A ; B = ~A
49 %C = sub int %B, %A ; C = 9*A-A == A*8 == A << 3
55 %C = sub int %A, %B ; C = A-3*A == A*-2
59 int %test10(int %A, int %B) { ; -A*-B == A*B
66 int %test10(int %A) { ; -A *c1 == A * -c1
72 bool %test11(ubyte %A, ubyte %B) {
74 %cD = setne ubyte %C, 0 ; == setne A, B
79 %B = shr int %A, ubyte 31
80 %C = sub int 0, %B ; == ushr A, 31
84 uint %test13(uint %A) {
85 %B = shr uint %A, ubyte 31
86 %C = sub uint 0, %B ; == sar A, 31