X87: initialize the FPU state for X87 in prologue.

src/x87/lithium-codegen-x87.cc

Index: src/x87/lithium-codegen-x87.cc
diff --git a/src/x87/lithium-codegen-x87.cc b/src/x87/lithium-codegen-x87.cc
index d9e5169fdec0dc6f60efaa20d55c1045e707daf8..1b5b176be134ad9034a0d0a9032ed05bc7e2c6a3 100644
--- a/src/x87/lithium-codegen-x87.cc
+++ b/src/x87/lithium-codegen-x87.cc
@@ -215,6 +215,10 @@ bool LCodeGen::GeneratePrologue() {
       }
     }
   }
+
+  // Initailize FPU state.
+  __ fninit();
+
   return !is_aborted();
 }
 
@@ -278,9 +282,6 @@ void LCodeGen::DoPrologue(LPrologue* instr) {
     Comment(";;; End allocate local context");
   }
 
-  // Initailize FPU state.
-  __ fninit();
-
   Comment(";;; Prologue end");
 }