File: tailcall-disable.ll

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (40 lines) | stat: -rw-r--r-- 868 bytes parent folder | download | duplicates (23) 
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
34
35
36
37
38
39
40
 
; RUN: llc -disable-tail-calls < %s | FileCheck --check-prefix=CALL %s
; RUN: llc < %s | FileCheck --check-prefix=JMP %s

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

define dso_local i32 @helper() nounwind {
entry:
  ret i32 7
}

define dso_local i32 @test1() nounwind {
entry:
  %call = tail call i32 @helper()
  ret i32 %call
}

; CALL-LABEL: test1:
; CALL-NOT: ret
; CALL: callq helper
; CALL: ret

; JMP-LABEL: test1:
; JMP-NOT: ret
; JMP: jmp helper # TAILCALL

define dso_local i32 @test2() nounwind {
entry:
  %call = tail call i32 @test2()
  ret i32 %call
}

; CALL-LABEL: test2:
; CALL-NOT: ret
; CALL: callq test2
; CALL: ret

; JMP-LABEL: test2:
; JMP-NOT: ret
; JMP: jmp test2 # TAILCALL