# REQUIRES: ld.lld,llvm-ar,tempshortpaths

# Check that any short 8.3 form paths (containing '~' characters) in ThinLTO
# Module IDs are expanded prior to being passed to the distributor.
#
# This test is Windows-specific, as enforced by `tempshortpaths`.

RUN: rm -rf %t && split-file %s %t && cd %t

# Create an archive and a thin archive to confirm member paths are expanded.
RUN: %clang --target=x86_64-linux-gnu -c foo.c moo.c start.c -flto=thin -O2
RUN: llvm-ar rcs foo.a foo.o
RUN: llvm-ar --thin rcs moo.a moo.o

# Build with DTLTO.
RUN: %python in-83-dir.py \
RUN:   %clang --target=x86_64-linux-gnu -flto=thin -fuse-ld=lld -nostdlib \
RUN:     foo.a moo.a start.o -Wl,--save-temps \
RUN:     -fthinlto-distributor=%python \
RUN:     -Xthinlto-distributor=%llvm_src_root/utils/dtlto/local.py

# Check that all short 8.3 form paths have been expanded.
RUN: FileCheck --input-file a.*.dist-file.json %s --check-prefix=TILDE
TILDE-NOT: ~

# It is important that cross-module inlining occurs for this test to show that
# Clang can successfully load the bitcode file dependencies recorded in the
# summary indices. Explicitly check that the expected importing has occurred.
RUN: llvm-dis *.1.*.thinlto.bc -o - | \
RUN:   FileCheck %s --check-prefixes=FOO,MOO,START
RUN: llvm-dis *.2.*.thinlto.bc -o - | \
RUN:   FileCheck %s --check-prefixes=FOO,MOO,START
RUN: llvm-dis *.3.*.thinlto.bc -o - | \
RUN:   FileCheck %s --check-prefixes=FOO,MOO,START
FOO-DAG:   foo.o
MOO-DAG:   moo.o
START-DAG: start.o

#--- foo.c
extern int moo(int), _start(int);
__attribute__((retain)) int foo(int x) { return x + moo(x) + _start(x); }

#--- moo.c
extern int foo(int), _start(int);
__attribute__((retain)) int moo(int x) { return x + foo(x) + _start(x); }

#--- start.c
extern int foo(int), moo(int);
__attribute__((retain)) int _start(int x) { return x + foo(x) + moo(x); }

#--- in-83-dir.py
import os, shutil, sys, uuid, subprocess
from pathlib import Path
import ctypes
from ctypes import wintypes


def get_short_path(p):
    g = ctypes.windll.kernel32.GetShortPathNameW
    g.argtypes = [wintypes.LPCWSTR, wintypes.LPWSTR, wintypes.DWORD]
    g.restype = wintypes.DWORD
    n = g(os.path.abspath(p), None, 0)  # First call gets required buffer size.
    b = ctypes.create_unicode_buffer(n)
    if g(os.path.abspath(p), b, n):  # Second call fills buffer.
        return b.value
    raise ctypes.WinError()


temp = Path(os.environ["TEMP"])
assert temp.is_dir()

# Copy the CWD to a unique directory inside TEMP and ensure that one of the path
# components is long enough to have a distinct short 8.3 form.
# TEMP is likely to be on a drive that supports short 8.3 form paths.
d = (temp / str(uuid.uuid4()) / "veryverylong").resolve()
d.parent.mkdir(parents=True)
try:
    shutil.copytree(Path.cwd(), d)

    # Replace the arguments of the command that name files with equivalents in
    # our temp directory, prefixed with the short 8.3 form.
    cmd = [
        a if Path(a).is_absolute() or not (d / a).is_file() else get_short_path(d / a)
        for a in sys.argv[1:]
    ]

    print(cmd)

    sys.exit(subprocess.run(cmd).returncode)

finally:
    shutil.rmtree(d.parent)