File: and_add.ll

package info (click to toggle)
llvm-toolchain-snapshot 1%3A22~%2B%2B20251023025710%2B3f47a7be1ae6-1~exp5
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,336,076 kB
  • sloc: cpp: 7,822,956; ansic: 1,531,523; asm: 1,088,291; python: 260,779; f90: 98,765; objc: 70,846; lisp: 47,149; pascal: 17,852; sh: 8,636; ml: 5,111; perl: 4,720; makefile: 3,680; awk: 3,523; javascript: 2,270; xml: 892; fortran: 793
file content (15 lines) | stat: -rw-r--r-- 441 bytes parent folder | download | duplicates (31) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
 
; RUN: llc -verify-machineinstrs < %s -mtriple=ppc32-- -o %t
; RUN: grep slwi %t
; RUN: not grep addi %t
; RUN: not grep rlwinm %t

define i32 @test(i32 %A) {
        ;; shift
        %B = mul i32 %A, 8              ; <i32> [#uses=1]
        ;; dead, no demanded bits.
        %C = add i32 %B, 7              ; <i32> [#uses=1]
        ;; dead once add is gone.
        %D = and i32 %C, -8             ; <i32> [#uses=1]
        ret i32 %D
}