mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-30 15:32:52 +01:00
18 lines
617 B
LLVM
18 lines
617 B
LLVM
; 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 = cast bool %C1 to uint
|
|
%C2 = setgt int %A, %B
|
|
%ELIM2 = cast bool %C2 to uint
|
|
%C3 = and uint %ELIM1, %ELIM2
|
|
%ELIM3 = cast uint %C3 to bool
|
|
ret bool %ELIM3
|
|
}
|