File: bitcount.ll

package info (click to toggle)
llvm-toolchain-6.0 1%3A6.0.1-10
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 598,080 kB
  • sloc: cpp: 3,046,253; ansic: 595,057; asm: 271,965; python: 128,926; objc: 106,554; sh: 21,906; lisp: 10,191; pascal: 6,094; ml: 5,544; perl: 5,265; makefile: 2,227; cs: 2,027; xml: 686; php: 212; csh: 117
file content (19 lines) | stat: -rw-r--r-- 620 bytes parent folder | download | duplicates (14)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
; Tests to make sure bit counts of constants are folded
; RUN: opt < %s -instcombine -S | grep "ret i32 19"
; RUN: opt < %s -instcombine -S | \
; RUN:   grep -v declare | not grep llvm.ct

declare i31 @llvm.ctpop.i31(i31 %val) 
declare i32 @llvm.cttz.i32(i32 %val, i1) 
declare i33 @llvm.ctlz.i33(i33 %val, i1) 

define i32 @test(i32 %A) {
  %c1 = call i31 @llvm.ctpop.i31(i31 12415124)
  %c2 = call i32 @llvm.cttz.i32(i32 87359874, i1 true)
  %c3 = call i33 @llvm.ctlz.i33(i33 87359874, i1 true)
  %t1 = zext i31 %c1 to i32
  %t3 = trunc i33 %c3 to i32
  %r1 = add i32 %t1, %c2
  %r2 = add i32 %r1, %t3
  ret i32 %r2
}