File: optimize-mux.ll

package info (click to toggle)
llvm-toolchain-21 1%3A21.1.0-1
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 2,235,796 kB
  • sloc: cpp: 7,617,614; ansic: 1,433,901; asm: 1,058,726; python: 252,096; f90: 94,671; objc: 70,753; lisp: 42,813; pascal: 18,401; sh: 10,032; ml: 5,111; perl: 4,720; awk: 3,523; makefile: 3,401; javascript: 2,272; xml: 892; fortran: 770
file content (20 lines) | stat: -rw-r--r-- 580 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
; RUN: llc -mtriple=hexagon -hexagon-gen-mux-threshold=0 < %s | FileCheck %s --check-prefix=CHECK0
; RUN: llc -mtriple=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 }