File: clear-bitfield.ll

package info (click to toggle)
llvm-toolchain-18 1%3A18.1.8-20
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 1,909,296 kB
  • sloc: cpp: 6,667,975; ansic: 1,440,452; asm: 883,619; python: 230,549; objc: 76,880; f90: 74,238; lisp: 35,989; pascal: 16,571; sh: 10,229; perl: 7,459; ml: 5,047; awk: 3,523; makefile: 2,992; javascript: 2,149; xml: 892; fortran: 649; cs: 573
file content (28 lines) | stat: -rw-r--r-- 739 bytes parent folder | download | duplicates (18) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-- -combiner-reduce-load-op-store-width=false | FileCheck %s

%struct.bit_fields = type { i32 }

define void @clear_b1(ptr %ptr) {
; CHECK-LABEL: clear_b1:
; CHECK:       # %bb.0: # %entry
; CHECK-NEXT:    andl $-2, (%rdi)
; CHECK-NEXT:    retq
entry:
  %bf.load = load i32, ptr %ptr
  %bf.clear = and i32 %bf.load, -2
  store i32 %bf.clear, ptr %ptr
  ret void
}

define void @clear16(ptr %ptr) {
; CHECK-LABEL: clear16:
; CHECK:       # %bb.0: # %entry
; CHECK-NEXT:    andw $-2, (%rdi)
; CHECK-NEXT:    retq
entry:
  %bf.load = load i16, ptr %ptr
  %bf.clear = and i16 %bf.load, -2
  store i16 %bf.clear, ptr %ptr
  ret void
}