[OPENMP]Fix the float point semantics handling on the device.

The device should use the same float point representation as the host.
Previous patch fixed the handling of the sizes of the float point types,
but did not fixed the fp semantics. This patch makes target device to
use the host fp semantics. this is required for the correct data
transfer between host and device and correct codegen.

llvm-svn: 365485

1 files changed, 10 insertions, 2 deletions

diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index cf0221542f2..ea13dcb6506 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -1524,8 +1524,16 @@ const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const {
     return Target->getHalfFormat();
   case BuiltinType::Float:      return Target->getFloatFormat();
   case BuiltinType::Double:     return Target->getDoubleFormat();
-  case BuiltinType::LongDouble: return Target->getLongDoubleFormat();
-  case BuiltinType::Float128:   return Target->getFloat128Format();
+  case BuiltinType::LongDouble:
+    if (getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice &&
+        &Target->getLongDoubleFormat() != &AuxTarget->getLongDoubleFormat())
+      return AuxTarget->getLongDoubleFormat();
+    return Target->getLongDoubleFormat();
+  case BuiltinType::Float128:
+    if (getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice &&
+        &Target->getFloat128Format() != &AuxTarget->getFloat128Format())
+      return AuxTarget->getFloat128Format();
+    return Target->getFloat128Format();
   }
 }