1 ; This file contains various testcases that check to see that instcombine
2 ; is narrowing computations when possible.
3 ; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | \
4 ; RUN: grep {ret i1 false}
6 ; test1 - Eliminating the casts in this testcase (by narrowing the AND
7 ; operation) allows instcombine to realize the function always returns false.
9 bool %test1(int %A, int %B) {
10 %C1 = setlt int %A, %B
11 %ELIM1 = zext bool %C1 to uint
12 %C2 = setgt int %A, %B
13 %ELIM2 = zext bool %C2 to uint
14 %C3 = and uint %ELIM1, %ELIM2
15 %ELIM3 = trunc uint %C3 to bool