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[SystemZ] Enable `-mtune=` option in clang. 

https://reviews.llvm.org/D128910 enabled handling of
attribute "tune-cpu" in LLVM. This PR now enables
option `-mtune` in clang, which then generates the
new attribute.

Reviewed By: uweigand

Differential Revision: https://reviews.llvm.org/D129562
This commit is contained in:
Kai Nacke 2022-07-13 10:08:44 -04:00
parent 6589729206
commit 880eb839e6
4 changed files with 27 additions and 4 deletions
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2
clang/docs/ClangCommandLineReference.rst
View File

@ -3325,7 +3325,7 @@ Specify bit size of immediate TLS offsets (AArch64 ELF only): 12 (for 4KB) \| 24
.. option:: -mtune=<arg>
.. program:: clang
Only supported on X86 and RISC-V. Otherwise accepted for compatibility with GCC.
Only supported on X86, RISC-V and SystemZ. Otherwise accepted for compatibility with GCC.
.. option:: -mtvos-version-min=<arg>, -mappletvos-version-min=<arg>

2
clang/include/clang/Driver/Options.td
View File

@ -3950,7 +3950,7 @@ def module_file_info : Flag<["-"], "module-file-info">, Flags<[NoXarchOption,CC1
HelpText<"Provide information about a particular module file">;
def mthumb : Flag<["-"], "mthumb">, Group<m_Group>;
def mtune_EQ : Joined<["-"], "mtune=">, Group<m_Group>,
HelpText<"Only supported on X86 and RISC-V. Otherwise accepted for compatibility with GCC.">;
HelpText<"Only supported on X86, RISC-V and SystemZ. Otherwise accepted for compatibility with GCC.">;
def multi__module : Flag<["-"], "multi_module">;
def multiply__defined__unused : Separate<["-"], "multiply_defined_unused">;
def multiply__defined : Separate<["-"], "multiply_defined">;

8
clang/lib/Basic/Targets/SystemZ.h
View File

@ -123,6 +123,14 @@ public:
void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
bool isValidTuneCPUName(StringRef Name) const override {
return isValidCPUName(Name);
}
void fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values) const override {
fillValidCPUList(Values);
}
bool setCPU(const std::string &Name) override {
CPU = Name;
ISARevision = getISARevision(CPU);

19
clang/lib/Driver/ToolChains/Clang.cpp
View File

@ -2228,8 +2228,23 @@ void Clang::AddSparcTargetArgs(const ArgList &Args,
void Clang::AddSystemZTargetArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
bool HasBackchain = Args.hasFlag(options::OPT_mbackchain,
options::OPT_mno_backchain, false);
if (const Arg *A = Args.getLastArg(clang::driver::options::OPT_mtune_EQ)) {
StringRef Name = A->getValue();
std::string TuneCPU;
if (Name == "native")
TuneCPU = std::string(llvm::sys::getHostCPUName());
else
TuneCPU = std::string(Name);
if (!TuneCPU.empty()) {
CmdArgs.push_back("-tune-cpu");
CmdArgs.push_back(Args.MakeArgString(TuneCPU));
}
}
bool HasBackchain =
Args.hasFlag(options::OPT_mbackchain, options::OPT_mno_backchain, false);
bool HasPackedStack = Args.hasFlag(options::OPT_mpacked_stack,
options::OPT_mno_packed_stack, false);
systemz::FloatABI FloatABI =