Version 1.1.0-dev.5.2

dart/runtime/vm/intermediate_language_ia32.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 80 matching lines @@
     __ movl(EDI, ESP);
     __ subl(EDI, EBP);
     __ cmpl(EDI, Immediate(fp_sp_dist));
     __ j(EQUAL, &done, Assembler::kNearJump);
     __ int3();
     __ Bind(&done);
   }
 #endif
   __ LeaveFrame();
   __ ret();
-
-  // Generate 1 byte NOP so that the debugger can patch the
-  // return pattern with a call to the debug stub.
-  __ nop(1);
-  compiler->AddCurrentDescriptor(PcDescriptors::kReturn,
-                                 Isolate::kNoDeoptId,
-                                 token_pos());
 }
 
 
 LocationSummary* LoadLocalInstr::MakeLocationSummary(bool opt) const {
   const intptr_t kNumInputs = 0;
   return LocationSummary::Make(kNumInputs,
                                Location::RequiresRegister(),
                                LocationSummary::kNoCall);
 }
 
@@ skipping 617 matching lines @@
   Register result = locs()->out().reg();
   __ movl(result,
           Immediate(reinterpret_cast<uword>(Symbols::PredefinedAddress())));
   __ movl(result, Address(result,
                           char_code,
                           TIMES_HALF_WORD_SIZE,  // Char code is a smi.
                           Symbols::kNullCharCodeSymbolOffset * kWordSize));
 }
 
 
+LocationSummary* StringToCharCodeInstr::MakeLocationSummary(bool opt) const {
+  const intptr_t kNumInputs = 1;
+  return LocationSummary::Make(kNumInputs,
+                               Location::RequiresRegister(),
+                               LocationSummary::kNoCall);
+}
+
+
+void StringToCharCodeInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
+  ASSERT(cid_ == kOneByteStringCid);
+  Register str = locs()->in(0).reg();
+  Register result = locs()->out().reg();
+  Label is_one, done;
+  __ movl(result, FieldAddress(str, String::length_offset()));
+  __ cmpl(result, Immediate(Smi::RawValue(1)));
+  __ j(EQUAL, &is_one, Assembler::kNearJump);
+  __ movl(result, Immediate(Smi::RawValue(-1)));
+  __ jmp(&done);
+  __ Bind(&is_one);
+  __ movzxb(result, FieldAddress(str, OneByteString::data_offset()));
+  __ SmiTag(result);
+  __ Bind(&done);
+}
+
+
 LocationSummary* StringInterpolateInstr::MakeLocationSummary(bool opt) const {
   const intptr_t kNumInputs = 1;
   const intptr_t kNumTemps = 0;
   LocationSummary* summary =
       new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
   summary->set_in(0, Location::RegisterLocation(EAX));
   summary->set_out(Location::RegisterLocation(EAX));
   return summary;
 }
 
@@ skipping 3706 matching lines @@
 
 void CheckSmiInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register value = locs()->in(0).reg();
   Label* deopt = compiler->AddDeoptStub(deopt_id(),
                                         kDeoptCheckSmi);
   __ testl(value, Immediate(kSmiTagMask));
   __ j(NOT_ZERO, deopt);
 }
 
 
+// Length: register or constant.
+// Index: register, constant or stack slot.
 LocationSummary* CheckArrayBoundInstr::MakeLocationSummary(bool opt) const {
   const intptr_t kNumInputs = 2;
   const intptr_t kNumTemps = 0;
   LocationSummary* locs =
       new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kNoCall);
   locs->set_in(kLengthPos, Location::RegisterOrSmiConstant(length()));
-  locs->set_in(kIndexPos, Location::RegisterOrSmiConstant(index()));
+  ConstantInstr* index_constant = index()->definition()->AsConstant();
+  if (index_constant != NULL) {
+    locs->set_in(kIndexPos, Location::RegisterOrSmiConstant(index()));
+  } else {
+    locs->set_in(kIndexPos, Location::PrefersRegister());
+  }
   return locs;
 }
 
 
 void CheckArrayBoundInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Label* deopt = compiler->AddDeoptStub(deopt_id(), kDeoptCheckArrayBound);
 
   Location length_loc = locs()->in(kLengthPos);
   Location index_loc = locs()->in(kIndexPos);
 
@@ skipping 14 matching lines @@
     return;
   }
 
   if (index_loc.IsConstant()) {
     Register length = length_loc.reg();
     const Object& index = Smi::Cast(index_loc.constant());
     __ cmpl(length, Immediate(reinterpret_cast<int32_t>(index.raw())));
     __ j(BELOW_EQUAL, deopt);
   } else if (length_loc.IsConstant()) {
     const Smi& length = Smi::Cast(length_loc.constant());
-    Register index = index_loc.reg();
-    __ cmpl(index, Immediate(reinterpret_cast<int32_t>(length.raw())));
+    if (index_loc.IsStackSlot()) {
+      const Address& index = index_loc.ToStackSlotAddress();
+      __ cmpl(index, Immediate(reinterpret_cast<int32_t>(length.raw())));
+    } else {
+      Register index = index_loc.reg();
+      __ cmpl(index, Immediate(reinterpret_cast<int32_t>(length.raw())));
+    }
     __ j(ABOVE_EQUAL, deopt);
+  } else if (index_loc.IsStackSlot()) {
+    Register length = length_loc.reg();
+    const Address& index = index_loc.ToStackSlotAddress();
+    __ cmpl(length, index);
+    __ j(BELOW_EQUAL, deopt);
   } else {
     Register length = length_loc.reg();
     Register index = index_loc.reg();
     __ cmpl(index, length);
     __ j(ABOVE_EQUAL, deopt);
   }
 }
 
 
 LocationSummary* UnboxIntegerInstr::MakeLocationSummary(bool opt) const {
@@ skipping 677 matching lines @@
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_IA32