| ; This file contains various testcases that check to see that instcombine |
| ; is narrowing computations when possible. |
| |
| ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep 'ret bool false' |
| |
| ; test1 - Eliminating the casts in this testcase (by narrowing the AND |
| ; operation) allows instcombine to realize the function always returns false. |
| ; |
| bool %test1(int %A, int %B) { |
| %C1 = setlt int %A, %B |
| %ELIM1 = zext bool %C1 to uint |
| %C2 = setgt int %A, %B |
| %ELIM2 = zext bool %C2 to uint |
| %C3 = and uint %ELIM1, %ELIM2 |
| %ELIM3 = trunc uint %C3 to bool |
| ret bool %ELIM3 |
| } |