Vendor import of clang 6.0.1 release r335540:vendor/clang/clang-release_601-r335540vendor/clang-60

https://llvm.org/svn/llvm-project/cfe/tags/RELEASE_601/final@335540

5 files changed, 57 insertions, 17 deletions

diff --git a/lib/Driver/ToolChains/Arch/Mips.cpp b/lib/Driver/ToolChains/Arch/Mips.cpp
index 61481a92d0b7..e72754d5ad53 100644
--- a/lib/Driver/ToolChains/Arch/Mips.cpp
+++ b/lib/Driver/ToolChains/Arch/Mips.cpp
@@ -343,6 +343,28 @@ 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");
+
+  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 +469,20 @@ 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);
+}
diff --git a/lib/Driver/ToolChains/Arch/Mips.h b/lib/Driver/ToolChains/Arch/Mips.h
index 89eea9a1514c..7e90488363a5 100644
--- a/lib/Driver/ToolChains/Arch/Mips.h
+++ b/lib/Driver/ToolChains/Arch/Mips.h
@@ -53,6 +53,7 @@ bool isFPXXDefault(const llvm::Triple &Triple, StringRef CPUName,
 bool shouldUseFPXX(const llvm::opt::ArgList &Args, const llvm::Triple &Triple,
                    StringRef CPUName, StringRef ABIName,
                    mips::FloatABI FloatABI);
+bool supportsIndirectJumpHazardBarrier(StringRef &CPU);
 
 } // end namespace mips
 } // end namespace target
diff --git a/lib/Driver/ToolChains/Clang.cpp b/lib/Driver/ToolChains/Clang.cpp
index 484df520012c..a2821b70d716 100644
--- a/lib/Driver/ToolChains/Clang.cpp
+++ b/lib/Driver/ToolChains/Clang.cpp
@@ -3288,9 +3288,9 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
 
   Args.AddLastArg(CmdArgs, options::OPT_fveclib);
 
-  if (!Args.hasFlag(options::OPT_fmerge_all_constants,
-                    options::OPT_fno_merge_all_constants))
-    CmdArgs.push_back("-fno-merge-all-constants");
+  if (Args.hasFlag(options::OPT_fmerge_all_constants,
+                   options::OPT_fno_merge_all_constants, false))
+    CmdArgs.push_back("-fmerge-all-constants");
 
   // LLVM Code Generator Options.
 
diff --git a/lib/Driver/ToolChains/CrossWindows.cpp b/lib/Driver/ToolChains/CrossWindows.cpp
index 5049033c4137..6ca04a8a3abb 100644
--- a/lib/Driver/ToolChains/CrossWindows.cpp
+++ b/lib/Driver/ToolChains/CrossWindows.cpp
@@ -127,7 +127,8 @@ void tools::CrossWindows::Linker::ConstructJob(
     }
 
     CmdArgs.push_back("-shared");
-    CmdArgs.push_back("-Bdynamic");
+    CmdArgs.push_back(Args.hasArg(options::OPT_static) ? "-Bstatic"
+                                                       : "-Bdynamic");
 
     CmdArgs.push_back("--enable-auto-image-base");
 
diff --git a/lib/Driver/ToolChains/MinGW.cpp b/lib/Driver/ToolChains/MinGW.cpp
index 572ea803f2dc..db83ac6fa7a2 100644
--- a/lib/Driver/ToolChains/MinGW.cpp
+++ b/lib/Driver/ToolChains/MinGW.cpp
@@ -141,22 +141,21 @@ void tools::MinGW::Linker::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back("console");
   }
 
+  if (Args.hasArg(options::OPT_mdll))
+    CmdArgs.push_back("--dll");
+  else if (Args.hasArg(options::OPT_shared))
+    CmdArgs.push_back("--shared");
   if (Args.hasArg(options::OPT_static))
     CmdArgs.push_back("-Bstatic");
-  else {
-    if (Args.hasArg(options::OPT_mdll))
-      CmdArgs.push_back("--dll");
-    else if (Args.hasArg(options::OPT_shared))
-      CmdArgs.push_back("--shared");
+  else
     CmdArgs.push_back("-Bdynamic");
-    if (Args.hasArg(options::OPT_mdll) || Args.hasArg(options::OPT_shared)) {
-      CmdArgs.push_back("-e");
-      if (TC.getArch() == llvm::Triple::x86)
-        CmdArgs.push_back("_DllMainCRTStartup@12");
-      else
-        CmdArgs.push_back("DllMainCRTStartup");
-      CmdArgs.push_back("--enable-auto-image-base");
-    }
+  if (Args.hasArg(options::OPT_mdll) || Args.hasArg(options::OPT_shared)) {
+    CmdArgs.push_back("-e");
+    if (TC.getArch() == llvm::Triple::x86)
+      CmdArgs.push_back("_DllMainCRTStartup@12");
+    else
+      CmdArgs.push_back("DllMainCRTStartup");
+    CmdArgs.push_back("--enable-auto-image-base");
   }
 
   CmdArgs.push_back("-o");