File: optimize-mux.ll

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (20 lines) | stat: -rw-r--r-- 576 bytes parent folder | download | duplicates (22) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
; RUN: llc -march=hexagon -hexagon-gen-mux-threshold=0 < %s | FileCheck %s --check-prefix=CHECK0
; RUN: llc -march=hexagon -hexagon-gen-mux-threshold=4 < %s | FileCheck %s --check-prefix=CHECK4

; Generate mux with threshold = 0:
; CHECK0: [[R0:r[0-9]+]] = add(r0,#-48)
; CHECK0: [[P0:p[0-3]]] = cmpb.gtu([[R0]],#9)
; CHECK0: r0 = mux([[P0]],#0,#1)

; No mux for threshold = 4:
; CHECK4-NOT: mux

define zeroext i8 @f0(i8 zeroext %a0) #0 {
b0:
  %v0 = add i8 %a0, -48
  %v1 = icmp ult i8 %v0, 10
  %v2 = zext i1 %v1 to i8
  ret i8 %v2
}

attributes #0 = { nounwind readnone }