File: weak-undefined.ll

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb11u2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,634,820 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 (31 lines) | stat: -rw-r--r-- 894 bytes parent folder | download | duplicates (12) 
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
 
; RUN: llvm-as %s -o %t.o
; RUN: wasm-ld %t.o -o %t.wasm
; RUN: obj2yaml %t.wasm | FileCheck %s

; Test that undefined weak external functions are handled in the LTO case
; We had a bug where stub function generation was failing because functions
; that are in bitcode (pre-LTO) don't have signatures assigned.

target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"

declare extern_weak i32 @foo()

declare extern_weak i32 @bar()

; The reference to bar here will exist in the LTO file, but the LTO process will
; remove it, so it will never be referenced by an normal object file, and
; therefore never have a signature.
define void @unused_function() #0 {
entry:
    %call2 = call i32 @bar()
    ret void
}

define void @_start() #0 {
entry:
    %call2 = call i32 @foo()
    ret void
}

; CHECK: Name:            'undefined_weak:foo'