File: shift-folding.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 (23 lines) | stat: -rw-r--r-- 832 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
 
; RUN: llvm-as < %s | llc -march=x86 | \
; RUN:   grep {s\[ah\]\[rl\]l} | count 1

define i32* @test1(i32* %P, i32 %X) {
        %Y = lshr i32 %X, 2             ; <i32> [#uses=1]
        %gep.upgrd.1 = zext i32 %Y to i64               ; <i64> [#uses=1]
        %P2 = getelementptr i32* %P, i64 %gep.upgrd.1           ; <i32*> [#uses=1]
        ret i32* %P2
}

define i32* @test2(i32* %P, i32 %X) {
        %Y = shl i32 %X, 2              ; <i32> [#uses=1]
        %gep.upgrd.2 = zext i32 %Y to i64               ; <i64> [#uses=1]
        %P2 = getelementptr i32* %P, i64 %gep.upgrd.2           ; <i32*> [#uses=1]
        ret i32* %P2
}

define i32* @test3(i32* %P, i32 %X) {
        %Y = ashr i32 %X, 2             ; <i32> [#uses=1]
        %P2 = getelementptr i32* %P, i32 %Y             ; <i32*> [#uses=1]
        ret i32* %P2
}