#!/usr/bin/perl -w


# Need perl > 5.10 to use logic-defined or
use 5.006; use v5.10.1;
use File::Basename;

# HIP compiler driver
# Will call NVCC or HCC (depending on target) and pass the appropriate include and library options for
# the target compiler and HIP infrastructure.

# Will pass-through options to the target compiler.  The tools calling HIPCC must ensure the compiler
# options are appropriate for the target compiler.

# Environment variable HIP_PLATFORM control compilation path:
# HIP_PLATFORM='nvcc' or HIP_PLATFORM='hcc'.
# If HIP_PLATFORM is not set hipcc will attempt auto-detect based on if nvcc is found.
#
# Other environment variable controls:
# HIP_PATH  : Path to HIP directory, default is one dir level above location of this script
# CUDA_PATH : Path to CUDA SDK (default /usr/local/cuda). Used on NVIDIA platforms only.
# HCC_HOME  : Path to HCC SDK (default /opt/rocm/hcc).  Used on AMD platforms only.
# HSA_PATH  : Path to HSA dir (default /opt/rocm/hsa).  Used on AMD platforms only.

if(scalar @ARGV == 0){
print "No Arguments passed, exiting ...\n";
exit(-1);
}

#---
# Function to parse config file
sub parse_config_file {
    my ($file, $config) = @_;
    if (open (CONFIG, "$file")) {
        while (<CONFIG>) {
            my $config_line=$_;
            chop ($config_line);
            $config_line =~ s/^\s*//;
            $config_line =~ s/\s*$//;
            if (($config_line !~ /^#/) && ($config_line ne "")) {
                my ($name, $value) = split (/=/, $config_line);
                $$config{$name} = $value;
            }
        }
        close(CONFIG);
    }
}

$verbose = $ENV{'HIPCC_VERBOSE'} // 0;
# Verbose: 0x1=commands, 0x2=paths, 0x4=hippc args

$HIP_PATH=$ENV{'HIP_PATH'} // dirname (dirname $0); # use parent directory of hipcc

#---
# Read .hipInfo
my %hipConfig = ();
parse_config_file("$HIP_PATH/lib/.hipInfo", \%hipConfig);

#---
#HIP_PLATFORM controls whether to use NVCC or HCC for compilation:
$HIP_PLATFORM= `$HIP_PATH/bin/hipconfig --platform` // "hcc";
$HIP_VERSION= `$HIP_PATH/bin/hipconfig --version`;
($HIP_VERSION_MAJOR, $HIP_VERSION_MINOR, $HIP_VERSION_PATCH) = split(/\./, $HIP_VERSION);

if ($verbose & 0x2) {
    print ("HIP_PATH=$HIP_PATH\n");
    print ("HIP_PLATFORM=$HIP_PLATFORM\n");
}

# set if user explicitly requests -stdlib=libc++. (else we default to libstdc++ for better interop with g++):
$setStdLib = 0;  # TODO - set to 0

if ($HIP_PLATFORM eq "hcc") {
    $HSA_PATH=$ENV{'HSA_PATH'} // "/opt/rocm/hsa";

    $HCC_HOME=$ENV{'HCC_HOME'} // $hipConfig{'HCC_HOME'} // "/opt/rocm/hcc";

    $HCC_VERSION=`${HCC_HOME}/bin/hcc --version | cut -d" " -f9 | tr -d "\n"`;

    $ROCM_PATH=$ENV{'ROCM_PATH'} // "/opt/rocm";

    $HIP_ATP_MARKER=$ENV{'HIP_ATP_MARKER'};
    $marker_path = "$ROCM_PATH/profiler/CXLActivityLogger";

    $ROCM_TARGET=$ENV{'ROCM_TARGET'} // "fiji";

    # HCC* may be used to compile src/hip_hcc.o (and also feed the HIPCXXFLAGS below)
    $HCC = "$HCC_HOME/bin/hcc";
    $HCCFLAGS = "-hc -I$HCC_HOME/include ";

    $HIPCC=$HCC;
    $HIPCXXFLAGS = $HCCFLAGS;

    $HIPCXXFLAGS .= " -I$HIP_PATH/include/hip/hcc_detail/cuda";
    $HIPCXXFLAGS .= " -I$HSA_PATH/include";
    $HIPCXXFLAGS .= " -Wno-deprecated-register";
    $HIPLDFLAGS =  "-hc -L$HCC_HOME/lib -Wl,--rpath=$HCC_HOME/lib -lc++ -ldl -lpthread -Wl,--whole-archive -lmcwamp -Wl,--no-whole-archive";

    # Suppress linker warnings in case HCC distribution contains OpenCL/SPIR symbols
    $HOST_OSNAME= `cat /etc/os-release | grep "^ID\=" | cut -d= -f2 | tr -d '\n'`;
    $HOST_OSVER= `cat /etc/os-release | grep "^VERSION_ID\=" | cut -d= -f2 | tr -d '\n'`;
    if ($HOST_OSNAME eq "ubuntu" and $HOST_OSVER eq "\"16.04\"") {
        # No additional flags required
    } else {
        $HIPLDFLAGS .= " -Wl,--defsym=_binary_kernel_spir_end=1 -Wl,--defsym=_binary_kernel_spir_start=1 -Wl,--defsym=_binary_kernel_cl_start=1 -Wl,--defsym=_binary_kernel_cl_end=1";
    }

    # Satisfy HCC dependencies
    $HIPLDFLAGS .= " -lc++abi -lsupc++";
    $HIPLDFLAGS .= " -L$HSA_PATH/lib -L$ROCM_PATH/lib -lhsa-runtime64 -lhc_am -lhsakmt";

    # Handle ROCm target platform
    if ($ROCM_TARGET eq "fiji") {
        $HIPLDFLAGS .= " -amdgpu-target=AMD:AMDGPU:8:0:3";
    }
    if ($ROCM_TARGET eq "carrizo") {
        $HIPLDFLAGS .= " -amdgpu-target=AMD:AMDGPU:8:0:1";
    }
    if ($ROCM_TARGET eq "hawaii") {
        $HIPLDFLAGS .= " -amdgpu-target=AMD:AMDGPU:7:0:1";
    }

    # Add trace marker library:
    # TODO - once we cleanly separate the HIP API headers from HIP library headers this logic should move to CMakebuild option - apps do not need to see the marker library.
    if ($HIP_ATP_MARKER) {
        $marker_inc_path = "$marker_path/include";
        if (-e $marker_inc_path) {
            $HIPCXXFLAGS .= " -I$marker_inc_path";
        }
    }

    $marker_lib_path = "$marker_path/bin/x86_64";
    if (-e $marker_lib_path) {
        $HIPLDFLAGS .= " -L$marker_lib_path -lCXLActivityLogger -Wl,--rpath=$marker_lib_path";
    }

    # Add C++ libs for GCC.
    $HIPLDFLAGS .= " -lstdc++";
    $HIPLDFLAGS .= " -lm";

    if ($verbose & 0x2) {
        print ("HSA_PATH=$HSA_PATH\n");
        print ("HCC_HOME=$HCC_HOME\n");
    }

} elsif ($HIP_PLATFORM eq "nvcc") {
    if ($verbose & 0x2) {
        print ("CUDA_PATH=$CUDA_PATH\n");
    }
    $CUDA_PATH=$ENV{'CUDA_PATH'} // '/usr/local/cuda';

    $HIPCC="$CUDA_PATH/bin/nvcc";
    $HIPCXXFLAGS .= " -I$CUDA_PATH/include";

    $HIPLDFLAGS = "-lcuda -lcudart -L$CUDA_PATH/lib64";
} else {
    printf ("error: unknown HIP_PLATFORM = '$HIP_PLATFORM'");
    exit (-1);
}

# Add paths to common HIP includes:
$HIPCXXFLAGS .= " -I$HIP_PATH/include -DHIP_VERSION_MAJOR=$HIP_VERSION_MAJOR -DHIP_VERSION_MINOR=$HIP_VERSION_MINOR -DHIP_VERSION_PATCH=$HIP_VERSION_PATCH" ;

my $compileOnly = 0;
my $needCXXFLAGS = 0;  # need to add CXX flags to compile step
my $needLDFLAGS = 1;   # need to add LDFLAGS to compile step.
my $hasC = 0;          # options contain a c-style file (NVCC must force recognition as GPU file)
my $hasCU = 0;         # options contain a cu-style file (HCC must force recognition as GPU file)
my $needHipHcc = ($HIP_PLATFORM eq 'hcc');      # set if we need to link hip_hcc.o from src tree. (some builds, ie cmake, provide their own)
my $printHipVersion = 0;    # print HIP version
my $runCmd = 1;
my $buildDeps = 0;


my @options = ();
my @inputs  = ();

if ($verbose & 0x4) {
    print "hipcc-args: ", join (" ", @ARGV), "\n";
}

# Handle code object generation
my $ISACMD="";
if($HIP_PLATFORM eq "hcc"){
  $ISACMD .= "set ROCM_PATH=$ROCM_PATH && set ROCM_TARGET=$ROCM_TARGET && $HIP_PATH/bin/hccgenco.sh ";
  if($ARGV[0] eq "--genco"){
    foreach $isaarg (@ARGV[1..$#ARGV]){
      $ISACMD .= " ";
      $ISACMD .= $isaarg;
    }
    if ($verbose & 0x1) {
      print "hipcc-cmd: ", $ISACMD, "\n";
    }
    system($ISACMD) and die();
    exit(0);
  }
}

if($HIP_PLATFORM eq "hcc"){
    $EXPORT_LL=" ";
    $ENV{HCC_EXTRA_LIBRARIES}="$HIP_PATH/lib/hip_ir.ll\n";
}

if($HIP_PLATFORM eq "nvcc"){
  $ISACMD .= "$HIP_PATH/bin/hipcc -ptx ";
  if($ARGV[0] eq "--genco"){
    foreach $isaarg (@ARGV[1..$#ARGV]){
      $ISACMD .= " ";
      $ISACMD .= $isaarg;
    }
    if ($verbose & 0x1) {
      print "hipcc-cmd: ", $ISACMD, "\n";
    }
    system($ISACMD) and die();
    exit(0);
  }
}

my $toolArgs = "";  # arguments to pass to the hcc or nvcc tool

foreach $arg (@ARGV)
{
    my $swallowArg = 0;
    if ($arg eq '-c') {
        $compileOnly = 1;
        $needCXXFLAGS = 1;
        $needLDFLAGS  = 0;
    }
    if ($arg eq '-o') {
        $needLDFLAGS = 1;
    }

    if(($arg eq '-stdlib=libc++') and ($setStdLib eq 0))
    {
        $HIPCXXFLAGS .= " -stdlib=libc++";
        $setStdLib = 1;
    }
    if(($arg eq '-stdlib=libstdc++') and ($setStdLib eq 0))
    {
        $HIPCXXFLAGS .= " -stdlib=libstdc++";
        $setStdLib = 1;
    }
    if($arg eq '--version') {
        $printHipVersion = 1;
    }
    if($arg eq '--short-version') {
        $printHipVersion = 1;
        $runCmd = 0;
    }
    if($arg eq '-M') {
        $compileOnly = 1;
        $buildDeps = 1;
    }

    if ($arg =~ m/^-/) {
        # options start with -

        # Process HIPCC options here:
        if ($arg =~ m/^--hipcc/) {
            $swallowArg = 1;
            if ($arg eq "--hipcc_explicit_lib") {
                # Some environments (ie cmake tests) already link their own hip_hcc.o, so don't add here:
                $needHipHcc = 0;
            }
        } else {
            push (@options, $arg);
        }
        #print "O: <$arg>\n";
    } else  {
        # input files and libraries
        if (($arg =~ /\.cpp$/) or ($arg =~ /\.c$/) or ($arg =~ /\.cc$/) ) {
            $hasC = 1;
            $needCXXFLAGS = 1;
        }
        if (($arg =~ /\.cu$/) or ($arg =~ /\.cuh$/)) {
            $hasCU = 1;
            $needCXXFLAGS = 1;
        }

        push (@inputs, $arg);
        #print "I: <$arg>\n";
    }
    $toolArgs .= " $arg" unless $swallowArg;
}

if ($hasC and $HIP_PLATFORM eq 'nvcc') {
    $HIPCXXFLAGS .= " -x cu";
}
if ($hasCU and $HIP_PLATFORM eq 'hcc') {
    $HIPCXXFLAGS .= " -x c++";
}
if ($buildDeps and $HIP_PLATFORM eq 'nvcc') {
    $HIPCXXFLAGS .= " -M -D__CUDACC__";
}

if ($setStdLib eq 0 and $HIP_PLATFORM eq 'hcc')
{
    $HIPCXXFLAGS .= " -stdlib=libstdc++";
}

if ($needHipHcc) {
    $HIP_LIB_TYPE = $hipConfig{'HIP_LIB_TYPE'} // 0;

    if ($HIP_LIB_TYPE eq 0) {
        $HIPLDFLAGS .= " $HIP_PATH/lib/device_util.cpp.o $HIP_PATH/lib/hip_device.cpp.o $HIP_PATH/lib/hip_error.cpp.o $HIP_PATH/lib/hip_event.cpp.o $HIP_PATH/lib/hip_hcc.cpp.o $HIP_PATH/lib/hip_memory.cpp.o $HIP_PATH/lib/hip_peer.cpp.o $HIP_PATH/lib/hip_stream.cpp.o $HIP_PATH/lib/hip_ldg.cpp.o $HIP_PATH/lib/hip_fp16.cpp.o $HIP_PATH/lib/hip_context.cpp.o $HIP_PATH/lib/hip_module.cpp.o";
    } elsif ($HIP_LIB_TYPE eq 1) {
        $HIPLDFLAGS .= " -L$HIP_PATH/lib -lhip_hcc" ;
    } else {
        $HIPLDFLAGS .= " -L$HIP_PATH/lib -Wl,--rpath=$HIP_PATH/lib -lhip_hcc";
    }
}

# hipcc currrently requires separate compilation of source files, ie it is not possible to pass
# CPP files combined with .O files
# Reason is that NVCC uses the file extension to determine whether to compile in CUDA mode or
# pass-through CPP mode.



my $CMD="$HIPCC";
if ($needCXXFLAGS) {
    $CMD .= " $HIPCXXFLAGS";
}
if ($needLDFLAGS and not $compileOnly) {
    $CMD .= " $HIPLDFLAGS";
}
$CMD .= " $toolArgs";

if ($verbose & 0x1) {
    print "hipcc-cmd: ", $CMD, "\n";
}

if ($printHipVersion) {
    if ($runCmd) {
        print "HIP version: "
    }
    print $HIP_VERSION, "\n";
}
if ($runCmd) {
    if ($HIP_PLATFORM eq "hcc" and exists($hipConfig{'HCC_VERSION'}) and $HCC_VERSION ne $hipConfig{'HCC_VERSION'}) {
        print ("HIP ($HIP_PATH) was built using hcc $hipConfig{'HCC_VERSION'}, but you are using hcc $HCC_VERSION. Please rebuild HIP including cmake.\n") && die ();
    }
    system ("$CMD") and die ();
}