implement support for __builtin_eh_return_data_regno on x86-32 and x86-64.

This implements PR5034 and rdar://6836445.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82614 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/AST/ExprConstant.cpp b/lib/AST/ExprConstant.cpp
index 9c34547db1..5123aaa7ca 100644
--- a/lib/AST/ExprConstant.cpp
+++ b/lib/AST/ExprConstant.cpp
@@ -870,6 +870,12 @@ bool IntExprEvaluator::VisitCallExpr(const CallExpr *E) {
     // __builtin_constant_p always has one operand: it returns true if that
     // operand can be folded, false otherwise.
     return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E);
+      
+  case Builtin::BI__builtin_eh_return_data_regno: {
+    int Operand = E->getArg(0)->EvaluateAsInt(Info.Ctx).getZExtValue();
+    Operand = Info.Ctx.Target.getEHDataRegisterNumber(Operand);
+    return Success(Operand, E);
+  }
   }
 }