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[mips] Add support for -m(no-)local-sdata 

Teach the driver to support -mlocal-sdata. The backend already matches GCC's
default behaviour.

Reviewers: atanasyan, slthakur

Differential Revision: https://reviews.llvm.org/D35549

llvm-svn: 308683
This commit is contained in:
Simon Dardis 2017-07-20 22:23:21 +00:00
parent c35c34a7f9
commit 9f1d5d8cd5
3 changed files with 32 additions and 0 deletions
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4
clang/include/clang/Driver/Options.td
View File

@ -2041,6 +2041,10 @@ def mgpopt : Flag<["-"], "mgpopt">, Group<m_Group>,
def mno_gpopt : Flag<["-"], "mno-gpopt">, Group<m_Group>,
HelpText<"Do not use GP relative accesses for symbols known to be in a small"
" data section (MIPS)">;
def mlocal_sdata : Flag<["-"], "mlocal-sdata">, Group<m_Group>,
HelpText<"Extend the -G behaviour to object local data (MIPS)">;
def mno_local_sdata : Flag<["-"], "mno-local-sdata">, Group<m_Group>,
HelpText<"Do not extend the -G behaviour to object local data (MIPS)">;
def mnan_EQ : Joined<["-"], "mnan=">, Group<m_Group>;
def mabicalls : Flag<["-"], "mabicalls">, Group<m_Group>,
HelpText<"Enable SVR4-style position-independent code (Mips only)">;

13
clang/lib/Driver/ToolChains/Clang.cpp
View File

@ -1480,6 +1480,19 @@ void Clang::AddMIPSTargetArgs(const ArgList &Args,
if (NoABICalls && (!GPOpt || WantGPOpt)) {
CmdArgs.push_back("-mllvm");
CmdArgs.push_back("-mgpopt");
Arg *LocalSData = Args.getLastArg(options::OPT_mlocal_sdata,
options::OPT_mno_local_sdata);
if (LocalSData) {
CmdArgs.push_back("-mllvm");
if (LocalSData->getOption().matches(options::OPT_mlocal_sdata)) {
CmdArgs.push_back("-mlocal-sdata=1");
} else {
CmdArgs.push_back("-mlocal-sdata=0");
}
LocalSData->claim();
}
} else if ((!ABICalls || (!NoABICalls && ABICalls)) && WantGPOpt)
D.Diag(diag::warn_drv_unsupported_gpopt) << (ABICalls ? 0 : 1);

15
clang/test/Driver/mips-features.c
View File

@ -35,6 +35,21 @@
// RUN: | FileCheck --check-prefix=CHECK-MGPOPTDEF %s
// CHECK-MGPOPTDEF: "-mllvm" "-mgpopt"
//
// -mgpopt -mno-abicalls -mlocal-sdata
// RUN: %clang -target mips-linux-gnu -### -c %s -mno-abicalls -mno-gpopt -mgpopt -mno-local-sdata -mlocal-sdata 2>&1 \
// RUN: | FileCheck --check-prefix=CHECK-MLOCALSDATA %s
// CHECK-MLOCALSDATA: "-mllvm" "-mlocal-sdata=1"
//
// -mgpopt -mno-abicalls -mno-local-sdata
// RUN: %clang -target mips-linux-gnu -### -c %s -mno-abicalls -mno-gpopt -mgpopt -mlocal-sdata -mno-local-sdata 2>&1 \
// RUN: | FileCheck --check-prefix=CHECK-MNOLOCALSDATA %s
// CHECK-MNOLOCALSDATA: "-mllvm" "-mlocal-sdata=0"
//
// -mgpopt -mno-abicalls
// RUN: %clang -target mips-linux-gnu -### -c %s -mno-abicalls -mgpopt 2>&1 \
// RUN: | FileCheck --check-prefix=CHECK-MLOCALSDATADEF %s
// CHECK-MLOCALSDATADEF-NOT: "-mllvm" "-mlocal-sdata"
//
// -mips16
// RUN: %clang -target mips-linux-gnu -### -c %s \
// RUN: -mno-mips16 -mips16 2>&1 \