File: simple-zext.ll

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (16 lines) | stat: -rw-r--r-- 451 bytes parent folder | download | duplicates (13) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
; RUN: llc -mtriple=x86_64-apple-darwin < %s| FileCheck %s

; A bug in DAGCombiner prevented it forming a zextload in this simple case
; because it counted both the chain user and the real user against the
; profitability total.

define void @load_zext(ptr nocapture %p){
entry:
  %0 = load i32, ptr %p, align 4
  %and = and i32 %0, 255
  tail call void @use(i32 %and)
  ret void
; CHECK: movzbl ({{%r[a-z]+}}), {{%e[a-z]+}}
}

declare void @use(i32)