[lld/ELF] Add tests for start-lib / end-lib with eager loads (#120294)

Contains tests for the scenarios fixed in lld/COFF in #120292. They pass
without code changes, but I didn't see existing tests for this.

Author: nico

lld/test/ELF/Inputs/eager.s

@@ -0,0 +1,7 @@
+.globl eager
+eager:
+  retq
+
+.globl ogre
+ogre:
+  retq

lld/test/ELF/lto/Inputs/eager.ll

@@ -0,0 +1,10 @@
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @eager() {
+  ret void
+}
+
+define void @ogre() {
+  ret void
+}

lld/test/ELF/lto/start-lib.ll

@@ -3,25 +3,29 @@
 ; RUN: llvm-as %s -o %t1.o
 ; RUN: llvm-as %p/Inputs/start-lib1.ll -o %t2.o
 ; RUN: llvm-as %p/Inputs/start-lib2.ll -o %t3.o
+; RUN: llvm-as %p/Inputs/eager.ll -o %t-eager.o
 ;
-; RUN: ld.lld -shared -o %t3 %t1.o %t2.o %t3.o
+; RUN: ld.lld -shared -o %t3 %t1.o %t2.o %t3.o %t-eager.o
 ; RUN: llvm-readobj --symbols %t3 | FileCheck --check-prefix=TEST1 %s
 ; TEST1: Name: foo
 ; TEST1: Name: bar
 ;
-; RUN: ld.lld -shared -o %t3 -u bar %t1.o --start-lib %t2.o %t3.o
+; RUN: ld.lld -shared -o %t3 -u bar %t1.o --start-lib %t2.o %t3.o %t-eager.o
 ; RUN: llvm-readobj --symbols %t3 | FileCheck --check-prefix=TEST2 %s
 ; TEST2-NOT: Name: foo
 ; TEST2: Name: bar
 ;
-; RUN: ld.lld -shared -o %t3 %t1.o --start-lib %t2.o %t3.o
+; RUN: ld.lld -shared -o %t3 %t1.o --start-lib %t2.o %t3.o %t-eager.o
 ; RUN: llvm-readobj --symbols %t3 | FileCheck --check-prefix=TEST3 %s
 ; TEST3-NOT: Name: foo
 ; TEST3-NOT: Name: bar
 
 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
+declare void @eager()
+
 define void @_start() {
+  call void @eager()
   ret void
 }

lld/test/ELF/start-lib.s

@@ -5,18 +5,20 @@
 // RUN:   %p/Inputs/start-lib1.s -o %t2.o
 // RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux \
 // RUN:   %p/Inputs/start-lib2.s -o %t3.o
+// RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux \
+// RUN:   %p/Inputs/eager.s -o %t-eager.o
 
-// RUN: ld.lld -o %t3 %t1.o %t2.o %t3.o
+// RUN: ld.lld -o %t3 %t1.o %t2.o %t3.o %t-eager.o
 // RUN: llvm-readobj --symbols %t3 | FileCheck --check-prefix=TEST1 %s
 // TEST1: Name: foo
 // TEST1: Name: bar
 
-// RUN: ld.lld -o %t3 %t1.o -u bar --start-lib %t2.o %t3.o
+// RUN: ld.lld -o %t3 %t1.o -u bar --start-lib %t2.o %t3.o %t-eager.o
 // RUN: llvm-readobj --symbols %t3 | FileCheck --check-prefix=TEST2 %s
 // TEST2-NOT: Name: foo
 // TEST2: Name: bar
 
-// RUN: ld.lld -o %t3 %t1.o --start-lib %t2.o %t3.o
+// RUN: ld.lld -o %t3 %t1.o --start-lib %t2.o %t3.o %t-eager.o
 // RUN: llvm-readobj --symbols %t3 | FileCheck --check-prefix=TEST3 %s
 // TEST3-NOT: Name: foo
 // TEST3-NOT: Name: bar
@@ -32,3 +34,4 @@
 
 .globl _start
 _start:
+  callq eager