ARM: Pass -mcpu to clang-cc based on -march= and -mcpu=.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@81429 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index c52ae96..ad335b3 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -200,6 +200,68 @@
options::OPT_Xpreprocessor);
}
+static llvm::StringRef getARMTargetCPU(const ArgList &Args) {
+ // FIXME: Check the relative priority of these options against gcc. Also, what
+ // happens if the -mcpu and -march mismatch?
+
+ // If we have -mcpu=, use that.
+ if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
+ return A->getValue(Args);
+
+ // Otherwise, if we have -march= choose the base CPU for that arch.
+ if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
+ llvm::StringRef MArch = A->getValue(Args);
+
+ if (MArch == "armv2" || MArch == "armv2a")
+ return "arm2";
+ if (MArch == "armv3")
+ return "arm6";
+ if (MArch == "armv3m")
+ return "arm7m";
+ if (MArch == "armv4" || MArch == "armv4t")
+ return "arm7tdmi";
+ if (MArch == "armv5" || MArch == "armv5t")
+ return "arm10tdmi";
+ if (MArch == "armv5e" || MArch == "armv5te")
+ return "arm1026ejs";
+ if (MArch == "armv5tej")
+ return "arm926ejs";
+ if (MArch == "armv6" || MArch == "armv6k")
+ return "arm1136jf-s";
+ if (MArch == "armv6j")
+ return "arm1136j-s";
+ if (MArch == "armv6z" || MArch == "armv6zk")
+ return "arm1176jzf-s";
+ if (MArch == "armv6t2")
+ return "arm1156t2-s";
+ if (MArch == "armv7" || MArch == "armv7a" || MArch == "armv7-a")
+ return "cortex-a8";
+ if (MArch == "armv7r" || MArch == "armv7-r")
+ return "cortex-r4";
+ if (MArch == "armv7m" || MArch == "armv7-m")
+ return "cortex-m3";
+ if (MArch == "ep9312")
+ return "ep9312";
+ if (MArch == "iwmmxt")
+ return "iwmmxt";
+ if (MArch == "xscale")
+ return "xscale";
+ }
+
+ // Otherwise return the most base CPU LLVM supports.
+ return "arm7tdmi";
+}
+
+void Clang::AddARMTargetArgs(const ArgList &Args,
+ ArgStringList &CmdArgs) const {
+ // Set the CPU based on -march= and -mcpu=.
+ CmdArgs.push_back(Args.MakeArgString("-mcpu=" + getARMTargetCPU(Args)));
+
+ // FIXME: Set the "neon" feature.
+ // FIXME: Set -soft-float.
+ // FIXME: Set -float-abi=hard.
+}
+
void Clang::AddX86TargetArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
@@ -427,6 +489,11 @@
default:
break;
+ case llvm::Triple::arm:
+ case llvm::Triple::thumb:
+ AddARMTargetArgs(Args, CmdArgs);
+ break;
+
case llvm::Triple::x86:
case llvm::Triple::x86_64:
AddX86TargetArgs(Args, CmdArgs);