Move vldr in DoLoadKeyedFastDoubleElement before the hole check

This reschedules instructions to better absorb VFP load latency.
BUG=none
TEST=none

Review URL: https://codereview.chromium.org/11363086
Patch from Rajeev Krithivasan <rkrithiv@codeaurora.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12890 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/lithium-codegen-arm.cc

@@ -3040,13 +3040,12 @@ void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) {
                    (instr->additional_index() << element_size_shift)));
   }
 
+  __ vldr(result, elements, 0);
   if (instr->hydrogen()->RequiresHoleCheck()) {
     __ ldr(scratch, MemOperand(elements, sizeof(kHoleNanLower32)));
     __ cmp(scratch, Operand(kHoleNanUpper32));
     DeoptimizeIf(eq, instr->environment());
   }
-
-  __ vldr(result, elements, 0);
 }