1 //===--- VE.cpp - VE ToolChain Implementations ------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "VEToolchain.h"
10 #include "CommonArgs.h"
11 #include "clang/Driver/Compilation.h"
12 #include "clang/Driver/Driver.h"
13 #include "clang/Driver/Options.h"
14 #include "llvm/Option/ArgList.h"
15 #include "llvm/Support/FileSystem.h"
16 #include "llvm/Support/Path.h"
17 #include <cstdlib> // ::getenv
18 
19 using namespace clang::driver;
20 using namespace clang::driver::toolchains;
21 using namespace clang;
22 using namespace llvm::opt;
23 
24 /// VE tool chain
25 VEToolChain::VEToolChain(const Driver &D, const llvm::Triple &Triple,
26                          const ArgList &Args)
27     : Linux(D, Triple, Args) {
28   getProgramPaths().push_back("/opt/nec/ve/bin");
29   // ProgramPaths are found via 'PATH' environment variable.
30 
31   // Default library paths are following:
32   //   ${RESOURCEDIR}/lib/ve-unknown-linux-gnu,
33   // These are OK.
34 
35   // Default file paths are following:
36   //   ${RESOURCEDIR}/lib/linux/ve, (== getArchSpecificLibPath)
37   //   /lib/../lib64,
38   //   /usr/lib/../lib64,
39   //   ${BINPATH}/../lib,
40   //   /lib,
41   //   /usr/lib,
42   // These are OK for host, but no go for VE.
43 
44   // Define file paths from scratch here.
45   getFilePaths().clear();
46 
47   // Add library directories:
48   //   ${BINPATH}/../lib/ve-unknown-linux-gnu, (== getStdlibPath)
49   //   ${RESOURCEDIR}/lib/linux/ve, (== getArchSpecificLibPath)
50   //   ${SYSROOT}/opt/nec/ve/lib,
51   getFilePaths().push_back(getStdlibPath());
52   getFilePaths().push_back(getArchSpecificLibPath());
53   getFilePaths().push_back(computeSysRoot() + "/opt/nec/ve/lib");
54 }
55 
56 Tool *VEToolChain::buildAssembler() const {
57   return new tools::gnutools::Assembler(*this);
58 }
59 
60 Tool *VEToolChain::buildLinker() const {
61   return new tools::gnutools::Linker(*this);
62 }
63 
64 bool VEToolChain::isPICDefault() const { return false; }
65 
66 bool VEToolChain::isPIEDefault(const llvm::opt::ArgList &Args) const {
67   return false;
68 }
69 
70 bool VEToolChain::isPICDefaultForced() const { return false; }
71 
72 bool VEToolChain::SupportsProfiling() const { return false; }
73 
74 bool VEToolChain::hasBlocksRuntime() const { return false; }
75 
76 void VEToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
77                                             ArgStringList &CC1Args) const {
78   if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
79     return;
80 
81   if (DriverArgs.hasArg(options::OPT_nobuiltininc) &&
82       DriverArgs.hasArg(options::OPT_nostdlibinc))
83     return;
84 
85   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
86     SmallString<128> P(getDriver().ResourceDir);
87     llvm::sys::path::append(P, "include");
88     addSystemInclude(DriverArgs, CC1Args, P);
89   }
90 
91   if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) {
92     if (const char *cl_include_dir = getenv("NCC_C_INCLUDE_PATH")) {
93       SmallVector<StringRef, 4> Dirs;
94       const char EnvPathSeparatorStr[] = {llvm::sys::EnvPathSeparator, '\0'};
95       StringRef(cl_include_dir).split(Dirs, StringRef(EnvPathSeparatorStr));
96       ArrayRef<StringRef> DirVec(Dirs);
97       addSystemIncludes(DriverArgs, CC1Args, DirVec);
98     } else {
99       addSystemInclude(DriverArgs, CC1Args,
100                        getDriver().SysRoot + "/opt/nec/ve/include");
101     }
102   }
103 }
104 
105 void VEToolChain::addClangTargetOptions(const ArgList &DriverArgs,
106                                         ArgStringList &CC1Args,
107                                         Action::OffloadKind) const {
108   CC1Args.push_back("-nostdsysteminc");
109   bool UseInitArrayDefault = true;
110   if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
111                           options::OPT_fno_use_init_array, UseInitArrayDefault))
112     CC1Args.push_back("-fno-use-init-array");
113 }
114 
115 void VEToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
116                                                ArgStringList &CC1Args) const {
117   if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc) ||
118       DriverArgs.hasArg(options::OPT_nostdlibinc) ||
119       DriverArgs.hasArg(options::OPT_nostdincxx))
120     return;
121   if (const char *cl_include_dir = getenv("NCC_CPLUS_INCLUDE_PATH")) {
122     SmallVector<StringRef, 4> Dirs;
123     const char EnvPathSeparatorStr[] = {llvm::sys::EnvPathSeparator, '\0'};
124     StringRef(cl_include_dir).split(Dirs, StringRef(EnvPathSeparatorStr));
125     ArrayRef<StringRef> DirVec(Dirs);
126     addSystemIncludes(DriverArgs, CC1Args, DirVec);
127   } else {
128     // Add following paths for multiple target installation.
129     //   ${INSTALLDIR}/include/ve-unknown-linux-gnu/c++/v1,
130     //   ${INSTALLDIR}/include/c++/v1,
131     addLibCxxIncludePaths(DriverArgs, CC1Args);
132   }
133 }
134 
135 void VEToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
136                                       ArgStringList &CmdArgs) const {
137   assert((GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) &&
138          "Only -lc++ (aka libxx) is supported in this toolchain.");
139 
140   tools::addArchSpecificRPath(*this, Args, CmdArgs);
141 
142   CmdArgs.push_back("-lc++");
143   CmdArgs.push_back("-lc++abi");
144   CmdArgs.push_back("-lunwind");
145   // libc++ requires -lpthread under glibc environment
146   CmdArgs.push_back("-lpthread");
147   // libunwind requires -ldl under glibc environment
148   CmdArgs.push_back("-ldl");
149 }
150 
151 llvm::ExceptionHandling
152 VEToolChain::GetExceptionModel(const ArgList &Args) const {
153   // VE uses SjLj exceptions.
154   return llvm::ExceptionHandling::SjLj;
155 }
156