hanchenye-llvm-project/lld/test/COFF/icf-executable.s

# RUN: llvm-mc -triple=x86_64-windows-msvc %s -filetype=obj -o %t.obj
# RUN: lld-link -entry:main %t.obj -out:%t.exe -verbose 2>&1 | FileCheck %s

# CHECK: Selected internal
# CHECK:   Removed f2

.section .text,"xr",one_only,internal
internal:
.globl main
main:
call f2
ret

.section .text,"xr",one_only,f2
.globl f2
f2:
call main
ret
COFF: Stop requiring comdat sections to have an external leader to participate in ICF. This requirement was added in r254578 to fix pr25686. However, it appears to have originated from a misdiagnosis of the problem: link.exe refused to merge the two sections because they are non-executable, not because they have internal leaders. If I set up a similar scenario with functions instead of globals I see that link.exe merges them. Differential Revision: https://reviews.llvm.org/D40236 llvm-svn: 318682 2017-11-21 02:51:29 +08:00			`# RUN: llvm-mc -triple=x86_64-windows-msvc %s -filetype=obj -o %t.obj`
			`# RUN: lld-link -entry:main %t.obj -out:%t.exe -verbose 2>&1 \| FileCheck %s`

			`# CHECK: Selected internal`
			`# CHECK: Removed f2`

			`.section .text,"xr",one_only,internal`
			`internal:`
			`.globl main`
			`main:`
			`call f2`
			`ret`

			`.section .text,"xr",one_only,f2`
			`.globl f2`
			`f2:`
			`call main`
			`ret`