Support inlining and crankshaft optimization of Math.random.

src/ia32/lithium-ia32.cc

-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
@@ skipping 1450 matching lines @@
   LOperand* left = UseFixedDouble(instr->left(), xmm2);
   LOperand* right = exponent_type.IsDouble() ?
       UseFixedDouble(instr->right(), xmm1) :
       UseFixed(instr->right(), eax);
   LPower* result = new(zone()) LPower(left, right);
   return MarkAsCall(DefineFixedDouble(result, xmm3), instr,
                     CAN_DEOPTIMIZE_EAGERLY);
 }
 
 
+LInstruction* LChunkBuilder::DoRandom(HRandom* instr) {
+  ASSERT(instr->representation().IsDouble());
+  ASSERT(instr->global_object()->representation().IsTagged());
+  LOperand* global_object = UseFixed(instr->global_object(), eax);
+  LRandom* result = new(zone()) LRandom(global_object);
+  return MarkAsCall(DefineFixedDouble(result, xmm1),
+                    instr,
+                    CAN_DEOPTIMIZE_EAGERLY);

[fschneider, 2012/01/11 09:16:28]

Since you don't have a DeoptimizeIf in the generated code, you  need
CANNOT_DEOPTIMIZE_EAGERLY here (which is the default).

[Mads Ager (chromium), 2012/01/11 10:24:46]

Good catch! Thanks Florian. Done.

+}
+
+
 LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
   ASSERT(instr->left()->representation().IsTagged());
   ASSERT(instr->right()->representation().IsTagged());
   LOperand* context = UseFixed(instr->context(), esi);
   LOperand* left = UseFixed(instr->left(), edx);
   LOperand* right = UseFixed(instr->right(), eax);
   LCmpT* result = new(zone()) LCmpT(context, left, right);
   return MarkAsCall(DefineFixed(result, eax), instr);
 }
 
@@ skipping 906 matching lines @@
   LOperand* key = UseOrConstantAtStart(instr->key());
   LOperand* object = UseOrConstantAtStart(instr->object());
   LIn* result = new(zone()) LIn(context, key, object);
   return MarkAsCall(DefineFixed(result, eax), instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32