[intrinsics] Drop the now obsolete %_DoubleHi and %_DoubleLo intrinsics.

src/crankshaft/ia32/lithium-codegen-ia32.cc

Index: src/crankshaft/ia32/lithium-codegen-ia32.cc
diff --git a/src/crankshaft/ia32/lithium-codegen-ia32.cc b/src/crankshaft/ia32/lithium-codegen-ia32.cc
index f0af4dd56ce8b04deb063ae97cfbc0243423a591..7a7ae8a164a1fda73761fc0771fa6bed63571d93 100644
--- a/src/crankshaft/ia32/lithium-codegen-ia32.cc
+++ b/src/crankshaft/ia32/lithium-codegen-ia32.cc
@@ -4801,24 +4801,6 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
 }
 
 
-void LCodeGen::DoDoubleBits(LDoubleBits* instr) {
-  XMMRegister value_reg = ToDoubleRegister(instr->value());
-  Register result_reg = ToRegister(instr->result());
-  if (instr->hydrogen()->bits() == HDoubleBits::HIGH) {
-    if (CpuFeatures::IsSupported(SSE4_1)) {
-      CpuFeatureScope scope2(masm(), SSE4_1);
-      __ pextrd(result_reg, value_reg, 1);
-    } else {
-      XMMRegister xmm_scratch = double_scratch0();
-      __ pshufd(xmm_scratch, value_reg, 1);
-      __ movd(result_reg, xmm_scratch);
-    }
-  } else {
-    __ movd(result_reg, value_reg);
-  }
-}
-
-
 void LCodeGen::DoAllocate(LAllocate* instr) {
   class DeferredAllocate final : public LDeferredCode {
    public: