File: signext.ll

package info (click to toggle)
llvm 2.6-9.1
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 57,604 kB
  • ctags: 44,336
  • sloc: cpp: 344,766; sh: 12,407; ansic: 10,617; ada: 3,070; ml: 2,505; perl: 2,496; makefile: 1,426; pascal: 1,163; exp: 389; asm: 307; python: 298; objc: 260; lisp: 182; csh: 117; xml: 38; f90: 36; tcl: 20
file content (45 lines) | stat: -rw-r--r-- 1,547 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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
; RUN:    not grep {(and\|xor\|add\|shl\|shr)}
; END.

define i32 @test1(i32 %x) {
        %tmp.1 = and i32 %x, 65535              ; <i32> [#uses=1]
        %tmp.2 = xor i32 %tmp.1, -32768         ; <i32> [#uses=1]
        %tmp.3 = add i32 %tmp.2, 32768          ; <i32> [#uses=1]
        ret i32 %tmp.3
}

define i32 @test2(i32 %x) {
        %tmp.1 = and i32 %x, 65535              ; <i32> [#uses=1]
        %tmp.2 = xor i32 %tmp.1, 32768          ; <i32> [#uses=1]
        %tmp.3 = add i32 %tmp.2, -32768         ; <i32> [#uses=1]
        ret i32 %tmp.3
}

define i32 @test3(i16 %P) {
        %tmp.1 = zext i16 %P to i32             ; <i32> [#uses=1]
        %tmp.4 = xor i32 %tmp.1, 32768          ; <i32> [#uses=1]
        %tmp.5 = add i32 %tmp.4, -32768         ; <i32> [#uses=1]
        ret i32 %tmp.5
}

define i32 @test4(i16 %P) {
        %tmp.1 = zext i16 %P to i32             ; <i32> [#uses=1]
        %tmp.4 = xor i32 %tmp.1, 32768          ; <i32> [#uses=1]
        %tmp.5 = add i32 %tmp.4, -32768         ; <i32> [#uses=1]
        ret i32 %tmp.5
}

define i32 @test5(i32 %x) {
        %tmp.1 = and i32 %x, 254                ; <i32> [#uses=1]
        %tmp.2 = xor i32 %tmp.1, 128            ; <i32> [#uses=1]
        %tmp.3 = add i32 %tmp.2, -128           ; <i32> [#uses=1]
        ret i32 %tmp.3
}

define i32 @test6(i32 %x) {
        %tmp.2 = shl i32 %x, 16         ; <i32> [#uses=1]
        %tmp.4 = ashr i32 %tmp.2, 16            ; <i32> [#uses=1]
        ret i32 %tmp.4
}