long double should be 64 bits on FreeBSD/MIPS64. It possibly should be on

Linux too, as I think we inherited it from there.  The ABI spec says 128-bit,
although I think SGI's compiler on IRIX may be the only thing ever to support
this.

llvm-svn: 169674

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index c917f4f..9cfa278 100644 (file)
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -4222,6 +4222,10 @@ public:
     PointerWidth = PointerAlign = 64;
     LongDoubleWidth = LongDoubleAlign = 128;
     LongDoubleFormat = &llvm::APFloat::IEEEquad;
+    if (getTriple().getOS() == llvm::Triple::FreeBSD) {
+      LongDoubleWidth = LongDoubleAlign = 64;
+      LongDoubleFormat = &llvm::APFloat::IEEEdouble;
+    }
     SuitableAlign = 128;
   }
   virtual bool setABI(const std::string &Name) {

diff --git a/clang/test/Driver/mips-long-double.c b/clang/test/Driver/mips-long-double.c
new file mode 100644 (file)
index 0000000..12eb159
--- /dev/null
+++ b/clang/test/Driver/mips-long-double.c
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -triple mips64-unknown-freebsd -std=c11 -verify %s
+// RUN: %clang_cc1 -triple mips-unknown-freebsd -std=c11 -verify %s
+// RUN: %clang_cc1 -triple mips-unknown-linux-std=c11 -verify %s
+// RUN: %clang_cc1 -triple mips64-unknown-linux-std=c11 -verify %s
+// expected-no-diagnostics
+
+#ifdef _ABI64
+#  ifdef __FreeBSD__
+_Static_assert(sizeof(long double) == 8, "sizeof long double is wrong");
+_Static_assert(_Alignof(long double) == 8, "alignof long double is wrong");
+#  else
+_Static_assert(sizeof(long double) == 16, "sizeof long double is wrong");
+_Static_assert(_Alignof(long double) == 16, "alignof long double is wrong");
+#  endif
+#else
+_Static_assert(sizeof(long double) == 8, "sizeof long double is wrong");
+_Static_assert(_Alignof(long double) == 8, "alignof long double is wrong");
+#endif
+