[PATCH] Add support for v8fp to -mfpu

[Joey Gouly]

This adds support for -mfpu=fp=armv8 and neon-fp-armv8. These are the same options as GCC.

http://llvm-reviews.chandlerc.com/D1054

Files:
  lib/Basic/Targets.cpp
  lib/Driver/Tools.cpp
  test/Driver/arm-mfpu.c

Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp
+++ lib/Basic/Targets.cpp
@@ -3681,7 +3681,7 @@
                                  bool Enabled) const {
     if (Name == "soft-float" || Name == "soft-float-abi" ||
         Name == "vfp2" || Name == "vfp3" || Name == "vfp4" || Name == "neon" ||
-        Name == "d16" || Name == "neonfp") {
+        Name == "d16" || Name == "neonfp" || Name == "v8fp") {
       Features[Name] = Enabled;
     } else
       return false;
Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp
+++ lib/Driver/Tools.cpp
@@ -590,6 +590,14 @@
     CmdArgs.push_back("+vfp3");
     CmdArgs.push_back("-target-feature");
     CmdArgs.push_back("-neon");
+  } else if (FPU == "fp-armv8") {
+    CmdArgs.push_back("-target-feature");
+    CmdArgs.push_back("+v8fp");
+  } else if (FPU == "neon-fp-armv8") {
+    CmdArgs.push_back("-target-feature");
+    CmdArgs.push_back("+v8fp");
+    CmdArgs.push_back("-target-feature");
+    CmdArgs.push_back("+neon");
   } else if (FPU == "neon") {
     CmdArgs.push_back("-target-feature");
     CmdArgs.push_back("+neon");
Index: test/Driver/arm-mfpu.c
===================================================================
--- test/Driver/arm-mfpu.c
+++ test/Driver/arm-mfpu.c
@@ -46,3 +46,12 @@
 // RUN: %clang -target arm-linux-eabi -msoft-float %s -### -o %t.o 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-SOFT-FLOAT %s
 // CHECK-SOFT-FLOAT: "-target-feature" "-neon"
+
+// RUN: %clang -target armv8-linux-gnueabihf -mfpu=fp-armv8 %s -### 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-FP-ARMV8 %s
+// CHECK-FP-ARMV8: "-target-feature" "+v8fp"
+
+// RUN: %clang -target armv8-linux-gnueabihf -mfpu=neon-fp-armv8 %s -### 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-NEON-FP-ARMV8 %s
+// CHECK-NEON-FP-ARMV8: "-target-feature" "+v8fp"
+// CHECK-NEON-FP-ARMV8: "-target-feature" "+neon"
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