bpf: add -mcpu=# support for bpf
-mcpu=# will support:
. generic: the default insn set
. v1: insn set version 1, the same as generic
. v2: insn set version 2, version 1 + additional jmp insns
. probe: the compiler will probe the underlying kernel to
decide proper version of insn set.
Examples:
$ clang -target bpf -mcpu=v1 -c t.c
$ clang -target bpf -mcpu=v2 -c t.c
$ clang -target bpf -mcpu=generic -c t.c
$ clang -target bpf -mcpu=probe -c t.c
$ clang -target bpf -mcpu=v3 -c t.c
error: unknown target CPU 'v3'
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
llvm-svn: 311523
diff --git a/clang/lib/Basic/Targets/BPF.h b/clang/lib/Basic/Targets/BPF.h
index 536f5c1..4dd9cbd 100644
--- a/clang/lib/Basic/Targets/BPF.h
+++ b/clang/lib/Basic/Targets/BPF.h
@@ -76,6 +76,18 @@
return CCCR_OK;
}
}
+
+ bool isValidCPUName(StringRef Name) const override {
+ if (Name == "generic" || Name == "v1" ||
+ Name == "v2" || Name == "probe")
+ return true;
+ return false;
+ }
+
+ bool setCPU(const std::string &Name) override {
+ StringRef CPUName(Name);
+ return isValidCPUName(CPUName);
+ }
};
} // namespace targets
} // namespace clang
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index f488118..690f3b3 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -320,6 +320,8 @@
return TargetCPUName;
}
+ case llvm::Triple::bpfel:
+ case llvm::Triple::bpfeb:
case llvm::Triple::sparc:
case llvm::Triple::sparcel:
case llvm::Triple::sparcv9: