[Mips] Finetuning MIPS32 Android default variants

MIPS32 Android defaults to FPXX ("-fpxx").
MIPS32R6 Android defaults to FP64A ("-mfp64 -mno-odd-spreg").

Differential Revision: http://reviews.llvm.org/D20345

llvm-svn: 269914

3 files changed, 30 insertions, 3 deletions

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index f3d2ef4ebd3..bcc2af8fc00 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -1359,8 +1359,9 @@ static void getMIPSTargetFeatures(const Driver &D, const llvm::Triple &Triple,
   AddTargetFeature(Args, Features, options::OPT_mmsa, options::OPT_mno_msa,
                    "msa");
 
-  // Add the last -mfp32/-mfpxx/-mfp64 or if none are given and the ABI is O32
-  // pass -mfpxx
+  // Add the last -mfp32/-mfpxx/-mfp64, if none are given and the ABI is O32
+  // pass -mfpxx, or if none are given and fp64a is default, pass fp64 and
+  // nooddspreg.
   if (Arg *A = Args.getLastArg(options::OPT_mfp32, options::OPT_mfpxx,
                                options::OPT_mfp64)) {
     if (A->getOption().matches(options::OPT_mfp32))
@@ -1373,6 +1374,9 @@ static void getMIPSTargetFeatures(const Driver &D, const llvm::Triple &Triple,
   } else if (mips::shouldUseFPXX(Args, Triple, CPUName, ABIName, FloatABI)) {
     Features.push_back(Args.MakeArgString("+fpxx"));
     Features.push_back(Args.MakeArgString("+nooddspreg"));
+  } else if (mips::isFP64ADefault(Triple, CPUName)) {
+    Features.push_back(Args.MakeArgString("+fp64"));
+    Features.push_back(Args.MakeArgString("+nooddspreg"));
   }
 
   AddTargetFeature(Args, Features, options::OPT_mno_odd_spreg,
@@ -7039,10 +7043,21 @@ bool mips::isNaN2008(const ArgList &Args, const llvm::Triple &Triple) {
   return false;
 }
 
+bool mips::isFP64ADefault(const llvm::Triple &Triple, StringRef CPUName) {
+  if (!Triple.isAndroid())
+    return false;
+
+  // Android MIPS32R6 defaults to FP64A.
+  return llvm::StringSwitch<bool>(CPUName)
+      .Case("mips32r6", true)
+      .Default(false);
+}
+
 bool mips::isFPXXDefault(const llvm::Triple &Triple, StringRef CPUName,
                          StringRef ABIName, mips::FloatABI FloatABI) {
   if (Triple.getVendor() != llvm::Triple::ImaginationTechnologies &&
-      Triple.getVendor() != llvm::Triple::MipsTechnologies)
+      Triple.getVendor() != llvm::Triple::MipsTechnologies &&
+      !Triple.isAndroid())
     return false;
 
   if (ABIName != "32")
diff --git a/clang/lib/Driver/Tools.h b/clang/lib/Driver/Tools.h
index 723b1dcfa9b..514abf82f22 100644
--- a/clang/lib/Driver/Tools.h
+++ b/clang/lib/Driver/Tools.h
@@ -299,6 +299,7 @@ std::string getMipsABILibSuffix(const llvm::opt::ArgList &Args,
 bool hasMipsAbiArg(const llvm::opt::ArgList &Args, const char *Value);
 bool isUCLibc(const llvm::opt::ArgList &Args);
 bool isNaN2008(const llvm::opt::ArgList &Args, const llvm::Triple &Triple);
+bool isFP64ADefault(const llvm::Triple &Triple, StringRef CPUName);
 bool isFPXXDefault(const llvm::Triple &Triple, StringRef CPUName,
                    StringRef ABIName, mips::FloatABI FloatABI);
 bool shouldUseFPXX(const llvm::opt::ArgList &Args, const llvm::Triple &Triple,
diff --git a/clang/test/Driver/clang-translation.c b/clang/test/Driver/clang-translation.c
index fe1ec484761..cc3cd1b58b1 100644
--- a/clang/test/Driver/clang-translation.c
+++ b/clang/test/Driver/clang-translation.c
@@ -246,8 +246,19 @@
 // MIPSEL-ANDROID: clang
 // MIPSEL-ANDROID: "-cc1"
 // MIPSEL-ANDROID: "-target-cpu" "mips32"
+// MIPSEL-ANDROID: "-target-feature" "+fpxx"
+// MIPSEL-ANDROID: "-target-feature" "+nooddspreg"
 // MIPSEL-ANDROID: "-mfloat-abi" "hard"
 
+// RUN: %clang -target mipsel-linux-android -### -S %s -mcpu=mips32r6 2>&1 | \
+// RUN: FileCheck -check-prefix=MIPSEL-ANDROID-R6 %s
+// MIPSEL-ANDROID-R6: clang
+// MIPSEL-ANDROID-R6: "-cc1"
+// MIPSEL-ANDROID-R6: "-target-cpu" "mips32r6"
+// MIPSEL-ANDROID-R6: "-target-feature" "+fp64"
+// MIPSEL-ANDROID-R6: "-target-feature" "+nooddspreg"
+// MIPSEL-ANDROID-R6: "-mfloat-abi" "hard"
+
 // RUN: %clang -target mips64-linux-gnu -### -S %s 2>&1 | \
 // RUN: FileCheck -check-prefix=MIPS64 %s
 // MIPS64: clang