File: tailcall-lifetime-end.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 (26 lines) | stat: -rw-r--r-- 687 bytes parent folder | download | duplicates (13) 
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
 
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -o - %s | FileCheck %s

; A lifetime end intrinsic should not prevent a call from being tail call
; optimized.

define void @foobar() {
; CHECK-LABEL: foobar
; CHECK: pushq	%rax
; CHECK: leaq	4(%rsp), %rdi
; CHECK: callq	foo
; CHECK: popq	%rax
; CHECK: jmp	bar
entry:
  %i = alloca i32
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %i)
  call void @foo(ptr nonnull %i)
  tail call void @bar()
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %i)
  ret void
}

declare void @foo(ptr nocapture %p)
declare void @bar()

declare void @llvm.lifetime.start.p0(i64, ptr nocapture)
declare void @llvm.lifetime.end.p0(i64, ptr nocapture)