1 files changed, 65 insertions, 13 deletions

diff --git a/lib/Driver/ToolChains/Arch/Mips.cpp b/lib/Driver/ToolChains/Arch/Mips.cpp
index 61481a92d0b7..6d814631d05f 100644
--- a/lib/Driver/ToolChains/Arch/Mips.cpp
+++ b/lib/Driver/ToolChains/Arch/Mips.cpp
@@ -20,11 +20,6 @@ using namespace clang::driver::tools;
 using namespace clang;
 using namespace llvm::opt;
 
-bool tools::isMipsArch(llvm::Triple::ArchType Arch) {
-  return Arch == llvm::Triple::mips || Arch == llvm::Triple::mipsel ||
-         Arch == llvm::Triple::mips64 || Arch == llvm::Triple::mips64el;
-}
-
 // Get CPU and ABI names. They are not independent
 // so we have to calculate them together.
 void mips::getMipsCPUAndABI(const ArgList &Args, const llvm::Triple &Triple,
@@ -50,6 +45,13 @@ void mips::getMipsCPUAndABI(const ArgList &Args, const llvm::Triple &Triple,
   if (Triple.getOS() == llvm::Triple::OpenBSD)
     DefMips64CPU = "mips3";
 
+  // MIPS2 is the default for mips(el)?-unknown-freebsd.
+  // MIPS3 is the default for mips64(el)?-unknown-freebsd.
+  if (Triple.getOS() == llvm::Triple::FreeBSD) {
+    DefMips32CPU = "mips2";
+    DefMips64CPU = "mips3";
+  }
+
   if (Arg *A = Args.getLastArg(clang::driver::options::OPT_march_EQ,
                                options::OPT_mcpu_EQ))
     CPUName = A->getValue();
@@ -106,11 +108,7 @@ void mips::getMipsCPUAndABI(const ArgList &Args, const llvm::Triple &Triple,
 
   if (ABIName.empty()) {
     // Deduce ABI name from the target triple.
-    if (Triple.getArch() == llvm::Triple::mips ||
-        Triple.getArch() == llvm::Triple::mipsel)
-      ABIName = "o32";
-    else
-      ABIName = "n64";
+    ABIName = Triple.isMIPS32() ? "o32" : "n64";
   }
 
   if (CPUName.empty()) {
@@ -214,6 +212,7 @@ void mips::getMIPSTargetFeatures(const Driver &D, const llvm::Triple &Triple,
   // For case (a) we need to add +noabicalls for N64.
 
   bool IsN64 = ABIName == "64";
+  bool IsPIC = false;
   bool NonPIC = false;
 
   Arg *LastPICArg = Args.getLastArg(options::OPT_fPIC, options::OPT_fno_PIC,
@@ -225,6 +224,9 @@ void mips::getMIPSTargetFeatures(const Driver &D, const llvm::Triple &Triple,
     NonPIC =
         (O.matches(options::OPT_fno_PIC) || O.matches(options::OPT_fno_pic) ||
          O.matches(options::OPT_fno_PIE) || O.matches(options::OPT_fno_pie));
+    IsPIC =
+        (O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic) ||
+         O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie));
   }
 
   bool UseAbiCalls = false;
@@ -234,9 +236,14 @@ void mips::getMIPSTargetFeatures(const Driver &D, const llvm::Triple &Triple,
   UseAbiCalls =
       !ABICallsArg || ABICallsArg->getOption().matches(options::OPT_mabicalls);
 
-  if (UseAbiCalls && IsN64 && NonPIC) {
-    D.Diag(diag::warn_drv_unsupported_abicalls);
-    UseAbiCalls = false;
+  if (IsN64 && NonPIC && (!ABICallsArg || UseAbiCalls)) {
+    D.Diag(diag::warn_drv_unsupported_pic_with_mabicalls)
+        << LastPICArg->getAsString(Args) << (!ABICallsArg ? 0 : 1);
+    NonPIC = false;
+  }
+
+  if (ABICallsArg && !UseAbiCalls && IsPIC) {
+    D.Diag(diag::err_drv_unsupported_noabicalls_pic);
   }
 
   if (!UseAbiCalls)
@@ -343,6 +350,34 @@ void mips::getMIPSTargetFeatures(const Driver &D, const llvm::Triple &Triple,
   AddTargetFeature(Args, Features, options::OPT_mno_madd4, options::OPT_mmadd4,
                    "nomadd4");
   AddTargetFeature(Args, Features, options::OPT_mmt, options::OPT_mno_mt, "mt");
+  AddTargetFeature(Args, Features, options::OPT_mcrc, options::OPT_mno_crc,
+                   "crc");
+  AddTargetFeature(Args, Features, options::OPT_mvirt, options::OPT_mno_virt,
+                   "virt");
+  AddTargetFeature(Args, Features, options::OPT_mginv, options::OPT_mno_ginv,
+                   "ginv");
+
+  if (Arg *A = Args.getLastArg(options::OPT_mindirect_jump_EQ)) {
+    StringRef Val = StringRef(A->getValue());
+    if (Val == "hazard") {
+      Arg *B =
+          Args.getLastArg(options::OPT_mmicromips, options::OPT_mno_micromips);
+      Arg *C = Args.getLastArg(options::OPT_mips16, options::OPT_mno_mips16);
+
+      if (B && B->getOption().matches(options::OPT_mmicromips))
+        D.Diag(diag::err_drv_unsupported_indirect_jump_opt)
+            << "hazard" << "micromips";
+      else if (C && C->getOption().matches(options::OPT_mips16))
+        D.Diag(diag::err_drv_unsupported_indirect_jump_opt)
+            << "hazard" << "mips16";
+      else if (mips::supportsIndirectJumpHazardBarrier(CPUName))
+        Features.push_back("+use-indirect-jump-hazard");
+      else
+        D.Diag(diag::err_drv_unsupported_indirect_jump_opt)
+            << "hazard" << CPUName;
+    } else
+      D.Diag(diag::err_drv_unknown_indirect_jump_opt) << Val;
+  }
 }
 
 mips::IEEE754Standard mips::getIEEE754Standard(StringRef &CPU) {
@@ -447,3 +482,20 @@ bool mips::shouldUseFPXX(const ArgList &Args, const llvm::Triple &Triple,
 
   return UseFPXX;
 }
+
+bool mips::supportsIndirectJumpHazardBarrier(StringRef &CPU) {
+  // Supporting the hazard barrier method of dealing with indirect
+  // jumps requires MIPSR2 support.
+  return llvm::StringSwitch<bool>(CPU)
+      .Case("mips32r2", true)
+      .Case("mips32r3", true)
+      .Case("mips32r5", true)
+      .Case("mips32r6", true)
+      .Case("mips64r2", true)
+      .Case("mips64r3", true)
+      .Case("mips64r5", true)
+      .Case("mips64r6", true)
+      .Case("octeon", true)
+      .Case("p5600", true)
+      .Default(false);
+}