[lld][ELF][test] test LTO-removed symbols are not in symtab

Differential Revision: https://reviews.llvm.org/D90680

Author: Edd Dawson

lld/test/ELF/lto/internalize-basic.ll

@@ -2,6 +2,7 @@
 ; RUN: llvm-as %s -o %t.o
 ; RUN: ld.lld %t.o -o %t2 -save-temps
 ; RUN: llvm-dis < %t2.0.2.internalize.bc | FileCheck %s
+; RUN: llvm-readelf --syms %t2 | FileCheck --check-prefix=SYMTAB %s
 
 target triple = "x86_64-unknown-linux-gnu"
 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
@@ -25,3 +26,10 @@ define hidden void @foo() {
 ; Check that the foo and bar functions are correctly internalized.
 ; CHECK: define internal void @bar()
 ; CHECK: define internal void @foo()
+
+; Check foo and bar are not emitted to the .symtab
+; SYMTAB:      Symbol table '.symtab' contains 3 entries:
+; SYMTAB-NEXT: Num: Value  Size Type   Bind   Vis     Ndx    Name
+; SYMTAB-NEXT: 0:   {{.+}} 0    NOTYPE
+; SYMTAB-NEXT: 1:   {{.+}} 0    FILE
+; SYMTAB-NEXT: 2:   {{.+}} 1    FUNC   GLOBAL DEFAULT {{.+}} _start