File: remove-call-inst.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (33 lines) | stat: -rw-r--r-- 659 bytes parent folder | download | duplicates (7) 
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
29
30
31
32
33
 
; RUN: opt < %s -S -ipsccp | FileCheck %s
; PR5596

; IPSCCP should propagate the 0 argument, eliminate the switch, and propagate
; the result.

; CHECK: define i32 @main() #0 {
; CHECK-NEXT: entry:
; CHECK-NOT: call
; CHECK-NEXT: ret i32 123

define i32 @main() noreturn nounwind {
entry:
  %call2 = tail call i32 @wwrite(i64 0) nounwind
  ret i32 %call2
}

define internal i32 @wwrite(i64 %i) nounwind readnone {
entry:
  switch i64 %i, label %sw.default [
    i64 3, label %return
    i64 10, label %return
  ]

sw.default:
  ret i32 123

return:
  ret i32 0
}

; CHECK: attributes #0 = { noreturn nounwind }
; CHECK: attributes #1 = { nounwind readnone }