File: callslot_noalias.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 (26 lines) | stat: -rw-r--r-- 854 bytes parent folder | download | duplicates (4) 
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
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=memcpyopt < %s | FileCheck %s

declare void @func(ptr %dst)

; The noalias metadata from the call, the load and the store should be merged,
; so that no metadata is left on the call.
define i8 @test(ptr dereferenceable(1) noalias %dst) {
; CHECK-LABEL: @test(
; CHECK-NEXT:    [[TMP:%.*]] = alloca i8, align 1
; CHECK-NEXT:    call void @func(ptr nocapture [[DST:%.*]]) #[[ATTR0:[0-9]+]]{{$}}
; CHECK-NEXT:    [[V2:%.*]] = load i8, ptr [[DST]], align 1, !alias.scope !0
; CHECK-NEXT:    ret i8 [[V2]]
;
  %tmp = alloca i8
  call void @func(ptr nocapture %tmp) nounwind, !noalias !0
  %v = load i8, ptr %tmp, !noalias !0
  store i8 %v, ptr %dst, !alias.scope !0
  %v2 = load i8, ptr %dst, !alias.scope !0
  ret i8 %v2
}

!0 = !{!1}
!1 = !{!1, !2}
!2 = !{!2}