File: inverses.ll

package info (click to toggle)
llvm 2.2-12
  • links: PTS, VCS
  • area: main
  • in suites: lenny
  • size: 38,648 kB
  • ctags: 28,258
  • sloc: cpp: 215,479; sh: 12,132; ansic: 10,002; yacc: 5,525; perl: 2,352; ml: 1,580; makefile: 956; pascal: 718; lex: 602; exp: 320; ada: 193; lisp: 160; csh: 116; objc: 59; python: 59; tcl: 20
file content (25 lines) | stat: -rw-r--r-- 706 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
; RUN: llvm-upgrade < %s | llvm-as | opt -reassociate -dce | llvm-dis | \
; RUN:   not grep {\\(and\\|sub\\)}

int %test1(int %a, int %b) {
        %tmp.2 = and int %b, %a
        %tmp.4 = xor int %a, -1
        %tmp.5 = and int %tmp.2, %tmp.4 ; (A&B)&~A == 0
        ret int %tmp.5
}

int %test2(int %a, int %b) {
	%tmp.1 = and int %a, 1234
        %tmp.2 = and int %b, %tmp.1
        %tmp.4 = xor int %a, -1
        %tmp.5 = and int %tmp.2, %tmp.4 ; A&~A == 0
        ret int %tmp.5
}

int %test3(int %b, int %a) {
	%tmp.1 = add int %a, 1234
        %tmp.2 = add int %b, %tmp.1
        %tmp.4 = sub int 0, %a
        %tmp.5 = add int %tmp.2, %tmp.4   ; (b+(a+1234))+-a -> b+1234
        ret int %tmp.5
}