REQUIRES: ld.lld,llvm-ar

## Test that a DTLTO link succeeds and outputs the expected set of files
## correctly when thin archives are present.

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

## Compile bitcode. -O2 is required for cross-module importing.
RUN: %clang -O2 --target=x86_64-linux-gnu -flto=thin -c \
RUN:   foo.c bar.c dog.c cat.c start.c

## Generate thin archives.
RUN: llvm-ar rcs foo.a foo.o --thin
## Create this bitcode thin archive in a subdirectory to test the expansion of
## the path to a bitcode file that is referenced using "..", e.g., in this case
## "../bar.o".
RUN: mkdir lib
RUN: llvm-ar rcs lib/bar.a bar.o --thin
## Create this bitcode thin archive with an absolute path entry containing "..".
RUN: llvm-ar rcs dog.a %t/lib/../dog.o --thin
## The bitcode member of cat.a will not be used in the link.
RUN: llvm-ar rcs cat.a cat.o --thin
RUN: llvm-ar rcs start.a start.o --thin

## Link from a different directory to ensure that thin archive member paths are
## resolved correctly relative to the archive locations.
RUN: mkdir %t/out && cd %t/out

RUN: %clang --target=x86_64-linux-gnu -flto=thin -fuse-ld=lld %t/foo.a %t/lib/bar.a ../start.a %t/cat.a \
RUN:   -Wl,--whole-archive ../dog.a \
RUN:   -fthinlto-distributor=%python \
RUN:   -Xthinlto-distributor=%llvm_src_root/utils/dtlto/local.py \
RUN:   -Wl,--save-temps -nostdlib -Werror

## Check that the required output files have been created.
RUN: ls | sort | FileCheck %s

## No files are expected before.
CHECK-NOT: {{.}}

## JSON jobs description.
CHECK: {{^}}a.[[PID:[a-zA-Z0-9_]+]].dist-file.json{{$}}

## Native output object files and individual summary index files.
CHECK: {{^}}bar.3.[[PID]].native.o{{$}}
CHECK: {{^}}bar.3.[[PID]].native.o.thinlto.bc{{$}}
CHECK: {{^}}dog.1.[[PID]].native.o{{$}}
CHECK: {{^}}dog.1.[[PID]].native.o.thinlto.bc{{$}}
CHECK: {{^}}foo.2.[[PID]].native.o{{$}}
CHECK: {{^}}foo.2.[[PID]].native.o.thinlto.bc{{$}}
CHECK: {{^}}start.4.[[PID]].native.o{{$}}
CHECK: {{^}}start.4.[[PID]].native.o.thinlto.bc{{$}}

## No files are expected after.
CHECK-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 start.4.*.native.o.thinlto.bc -o - | \
RUN:   FileCheck %s --check-prefixes=FOO,BAR,START

RUN: llvm-dis dog.1.*.native.o.thinlto.bc -o - | \
RUN:   FileCheck %s --check-prefixes=FOO,BAR,DOG,START

RUN: llvm-dis foo.2.*.native.o.thinlto.bc -o - | \
RUN:   FileCheck %s --check-prefixes=FOO,BAR,START

RUN: llvm-dis bar.3.*.native.o.thinlto.bc -o - | \
RUN:   FileCheck %s --check-prefixes=FOO,BAR,START

FOO-DAG:   foo.o
BAR-DAG:   bar.o
DOG-DAG:   dog.o
START-DAG: start.o


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

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

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

#--- cat.c
__attribute__((retain)) void cat(int x) {}

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