Revert of Externalize deoptimization reasons.

src/ppc/lithium-codegen-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/hydrogen-osr.h"
@@ skipping 1047 matching lines @@
   Label dividend_is_not_negative, done;
   if (hmod->CheckFlag(HValue::kLeftCanBeNegative)) {
     __ cmpwi(dividend, Operand::Zero());
     __ bge(&dividend_is_not_negative);
     if (shift) {
       // Note that this is correct even for kMinInt operands.
       __ neg(dividend, dividend);
       __ ExtractBitRange(dividend, dividend, shift - 1, 0);
       __ neg(dividend, dividend, LeaveOE, SetRC);
       if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) {
-        DeoptimizeIf(eq, instr, Deoptimizer::kMinusZero, cr0);
+        DeoptimizeIf(eq, instr, "minus zero", cr0);
       }
     } else if (!hmod->CheckFlag(HValue::kBailoutOnMinusZero)) {
       __ li(dividend, Operand::Zero());
     } else {
-      DeoptimizeIf(al, instr, Deoptimizer::kMinusZero);
+      DeoptimizeIf(al, instr, "minus zero");
     }
     __ b(&done);
   }
 
   __ bind(&dividend_is_not_negative);
   if (shift) {
     __ ExtractBitRange(dividend, dividend, shift - 1, 0);
   } else {
     __ li(dividend, Operand::Zero());
   }
   __ bind(&done);
 }
 
 
 void LCodeGen::DoModByConstI(LModByConstI* instr) {
   Register dividend = ToRegister(instr->dividend());
   int32_t divisor = instr->divisor();
   Register result = ToRegister(instr->result());
   DCHECK(!dividend.is(result));
 
   if (divisor == 0) {
-    DeoptimizeIf(al, instr, Deoptimizer::kDivisionByZero);
+    DeoptimizeIf(al, instr, "division by zero");
     return;
   }
 
   __ TruncatingDiv(result, dividend, Abs(divisor));
   __ mov(ip, Operand(Abs(divisor)));
   __ mullw(result, result, ip);
   __ sub(result, dividend, result, LeaveOE, SetRC);
 
   // Check for negative zero.
   HMod* hmod = instr->hydrogen();
   if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) {
     Label remainder_not_zero;
     __ bne(&remainder_not_zero, cr0);
     __ cmpwi(dividend, Operand::Zero());
-    DeoptimizeIf(lt, instr, Deoptimizer::kMinusZero);
+    DeoptimizeIf(lt, instr, "minus zero");
     __ bind(&remainder_not_zero);
   }
 }
 
 
 void LCodeGen::DoModI(LModI* instr) {
   HMod* hmod = instr->hydrogen();
   Register left_reg = ToRegister(instr->left());
   Register right_reg = ToRegister(instr->right());
   Register result_reg = ToRegister(instr->result());
   Register scratch = scratch0();
   Label done;
 
   if (hmod->CheckFlag(HValue::kCanOverflow)) {
     __ li(r0, Operand::Zero());  // clear xer
     __ mtxer(r0);
   }
 
   __ divw(scratch, left_reg, right_reg, SetOE, SetRC);
 
   // Check for x % 0.
   if (hmod->CheckFlag(HValue::kCanBeDivByZero)) {
     __ cmpwi(right_reg, Operand::Zero());
-    DeoptimizeIf(eq, instr, Deoptimizer::kDivisionByZero);
+    DeoptimizeIf(eq, instr, "division by zero");
   }
 
   // Check for kMinInt % -1, divw will return undefined, which is not what we
   // want. We have to deopt if we care about -0, because we can't return that.
   if (hmod->CheckFlag(HValue::kCanOverflow)) {
     Label no_overflow_possible;
     if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) {
-      DeoptimizeIf(overflow, instr, Deoptimizer::kMinusZero, cr0);
+      DeoptimizeIf(overflow, instr, "minus zero", cr0);
     } else {
       __ bnooverflow(&no_overflow_possible, cr0);
       __ li(result_reg, Operand::Zero());
       __ b(&done);
     }
     __ bind(&no_overflow_possible);
   }
 
   __ mullw(scratch, right_reg, scratch);
   __ sub(result_reg, left_reg, scratch, LeaveOE, SetRC);
 
   // If we care about -0, test if the dividend is <0 and the result is 0.
   if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) {
     __ bne(&done, cr0);
     __ cmpwi(left_reg, Operand::Zero());
-    DeoptimizeIf(lt, instr, Deoptimizer::kMinusZero);
+    DeoptimizeIf(lt, instr, "minus zero");
   }
 
   __ bind(&done);
 }
 
 
 void LCodeGen::DoDivByPowerOf2I(LDivByPowerOf2I* instr) {
   Register dividend = ToRegister(instr->dividend());
   int32_t divisor = instr->divisor();
   Register result = ToRegister(instr->result());
   DCHECK(divisor == kMinInt || base::bits::IsPowerOfTwo32(Abs(divisor)));
   DCHECK(!result.is(dividend));
 
   // Check for (0 / -x) that will produce negative zero.
   HDiv* hdiv = instr->hydrogen();
   if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) {
     __ cmpwi(dividend, Operand::Zero());
-    DeoptimizeIf(eq, instr, Deoptimizer::kMinusZero);
+    DeoptimizeIf(eq, instr, "minus zero");
   }
   // Check for (kMinInt / -1).
   if (hdiv->CheckFlag(HValue::kCanOverflow) && divisor == -1) {
     __ lis(r0, Operand(SIGN_EXT_IMM16(0x8000)));
     __ cmpw(dividend, r0);
-    DeoptimizeIf(eq, instr, Deoptimizer::kOverflow);
+    DeoptimizeIf(eq, instr, "overflow");
   }
 
   int32_t shift = WhichPowerOf2Abs(divisor);
 
   // Deoptimize if remainder will not be 0.
   if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32) && shift) {
     __ TestBitRange(dividend, shift - 1, 0, r0);
-    DeoptimizeIf(ne, instr, Deoptimizer::kLostPrecision, cr0);
+    DeoptimizeIf(ne, instr, "lost precision", cr0);
   }
 
   if (divisor == -1) {  // Nice shortcut, not needed for correctness.
     __ neg(result, dividend);
     return;
   }
   if (shift == 0) {
     __ mr(result, dividend);
   } else {
     if (shift == 1) {
       __ srwi(result, dividend, Operand(31));
     } else {
       __ srawi(result, dividend, 31);
       __ srwi(result, result, Operand(32 - shift));
     }
     __ add(result, dividend, result);
     __ srawi(result, result, shift);
   }
   if (divisor < 0) __ neg(result, result);
 }
 
 
 void LCodeGen::DoDivByConstI(LDivByConstI* instr) {
   Register dividend = ToRegister(instr->dividend());
   int32_t divisor = instr->divisor();
   Register result = ToRegister(instr->result());
   DCHECK(!dividend.is(result));
 
   if (divisor == 0) {
-    DeoptimizeIf(al, instr, Deoptimizer::kDivisionByZero);
+    DeoptimizeIf(al, instr, "division by zero");
     return;
   }
 
   // Check for (0 / -x) that will produce negative zero.
   HDiv* hdiv = instr->hydrogen();
   if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) {
     __ cmpwi(dividend, Operand::Zero());
-    DeoptimizeIf(eq, instr, Deoptimizer::kMinusZero);
+    DeoptimizeIf(eq, instr, "minus zero");
   }
 
   __ TruncatingDiv(result, dividend, Abs(divisor));
   if (divisor < 0) __ neg(result, result);
 
   if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) {
     Register scratch = scratch0();
     __ mov(ip, Operand(divisor));
     __ mullw(scratch, result, ip);
     __ cmpw(scratch, dividend);
-    DeoptimizeIf(ne, instr, Deoptimizer::kLostPrecision);
+    DeoptimizeIf(ne, instr, "lost precision");
   }
 }
 
 
 // TODO(svenpanne) Refactor this to avoid code duplication with DoFlooringDivI.
 void LCodeGen::DoDivI(LDivI* instr) {
   HBinaryOperation* hdiv = instr->hydrogen();
   const Register dividend = ToRegister(instr->dividend());
   const Register divisor = ToRegister(instr->divisor());
   Register result = ToRegister(instr->result());
 
   DCHECK(!dividend.is(result));
   DCHECK(!divisor.is(result));
 
   if (hdiv->CheckFlag(HValue::kCanOverflow)) {
     __ li(r0, Operand::Zero());  // clear xer
     __ mtxer(r0);
   }
 
   __ divw(result, dividend, divisor, SetOE, SetRC);
 
   // Check for x / 0.
   if (hdiv->CheckFlag(HValue::kCanBeDivByZero)) {
     __ cmpwi(divisor, Operand::Zero());
-    DeoptimizeIf(eq, instr, Deoptimizer::kDivisionByZero);
+    DeoptimizeIf(eq, instr, "division by zero");
   }
 
   // Check for (0 / -x) that will produce negative zero.
   if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero)) {
     Label dividend_not_zero;
     __ cmpwi(dividend, Operand::Zero());
     __ bne(&dividend_not_zero);
     __ cmpwi(divisor, Operand::Zero());
-    DeoptimizeIf(lt, instr, Deoptimizer::kMinusZero);
+    DeoptimizeIf(lt, instr, "minus zero");
     __ bind(&dividend_not_zero);
   }
 
   // Check for (kMinInt / -1).
   if (hdiv->CheckFlag(HValue::kCanOverflow)) {
     Label no_overflow_possible;
     if (!hdiv->CheckFlag(HValue::kAllUsesTruncatingToInt32)) {
-      DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow, cr0);
+      DeoptimizeIf(overflow, instr, "overflow", cr0);
     } else {
       // When truncating, we want kMinInt / -1 = kMinInt.
       __ bnooverflow(&no_overflow_possible, cr0);
       __ mr(result, dividend);
     }
     __ bind(&no_overflow_possible);
   }
 
   if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) {
     // Deoptimize if remainder is not 0.
     Register scratch = scratch0();
     __ mullw(scratch, divisor, result);
     __ cmpw(dividend, scratch);
-    DeoptimizeIf(ne, instr, Deoptimizer::kLostPrecision);
+    DeoptimizeIf(ne, instr, "lost precision");
   }
 }
 
 
 void LCodeGen::DoFlooringDivByPowerOf2I(LFlooringDivByPowerOf2I* instr) {
   HBinaryOperation* hdiv = instr->hydrogen();
   Register dividend = ToRegister(instr->dividend());
   Register result = ToRegister(instr->result());
   int32_t divisor = instr->divisor();
 
   // If the divisor is positive, things are easy: There can be no deopts and we
   // can simply do an arithmetic right shift.
   int32_t shift = WhichPowerOf2Abs(divisor);
   if (divisor > 0) {
     if (shift || !result.is(dividend)) {
       __ srawi(result, dividend, shift);
     }
     return;
   }
 
   // If the divisor is negative, we have to negate and handle edge cases.
   OEBit oe = LeaveOE;
 #if V8_TARGET_ARCH_PPC64
   if (divisor == -1 && hdiv->CheckFlag(HValue::kLeftCanBeMinInt)) {
     __ lis(r0, Operand(SIGN_EXT_IMM16(0x8000)));
     __ cmpw(dividend, r0);
-    DeoptimizeIf(eq, instr, Deoptimizer::kOverflow);
+    DeoptimizeIf(eq, instr, "overflow");
   }
 #else
   if (hdiv->CheckFlag(HValue::kLeftCanBeMinInt)) {
     __ li(r0, Operand::Zero());  // clear xer
     __ mtxer(r0);
     oe = SetOE;
   }
 #endif
 
   __ neg(result, dividend, oe, SetRC);
   if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero)) {
-    DeoptimizeIf(eq, instr, Deoptimizer::kMinusZero, cr0);
+    DeoptimizeIf(eq, instr, "minus zero", cr0);
   }
 
 // If the negation could not overflow, simply shifting is OK.
 #if !V8_TARGET_ARCH_PPC64
   if (!instr->hydrogen()->CheckFlag(HValue::kLeftCanBeMinInt)) {
 #endif
     if (shift) {
       __ ShiftRightArithImm(result, result, shift);
     }
     return;
 #if !V8_TARGET_ARCH_PPC64
   }
 
   // Dividing by -1 is basically negation, unless we overflow.
   if (divisor == -1) {
-    DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow, cr0);
+    DeoptimizeIf(overflow, instr, "overflow", cr0);
     return;
   }
 
   Label overflow, done;
   __ boverflow(&overflow, cr0);
   __ srawi(result, result, shift);
   __ b(&done);
   __ bind(&overflow);
   __ mov(result, Operand(kMinInt / divisor));
   __ bind(&done);
 #endif
 }
 
 
 void LCodeGen::DoFlooringDivByConstI(LFlooringDivByConstI* instr) {
   Register dividend = ToRegister(instr->dividend());
   int32_t divisor = instr->divisor();
   Register result = ToRegister(instr->result());
   DCHECK(!dividend.is(result));
 
   if (divisor == 0) {
-    DeoptimizeIf(al, instr, Deoptimizer::kDivisionByZero);
+    DeoptimizeIf(al, instr, "division by zero");
     return;
   }
 
   // Check for (0 / -x) that will produce negative zero.
   HMathFloorOfDiv* hdiv = instr->hydrogen();
   if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) {
     __ cmpwi(dividend, Operand::Zero());
-    DeoptimizeIf(eq, instr, Deoptimizer::kMinusZero);
+    DeoptimizeIf(eq, instr, "minus zero");
   }
 
   // Easy case: We need no dynamic check for the dividend and the flooring
   // division is the same as the truncating division.
   if ((divisor > 0 && !hdiv->CheckFlag(HValue::kLeftCanBeNegative)) ||
       (divisor < 0 && !hdiv->CheckFlag(HValue::kLeftCanBePositive))) {
     __ TruncatingDiv(result, dividend, Abs(divisor));
     if (divisor < 0) __ neg(result, result);
     return;
   }
@@ skipping 30 matching lines @@
   if (hdiv->CheckFlag(HValue::kCanOverflow)) {
     __ li(r0, Operand::Zero());  // clear xer
     __ mtxer(r0);
   }
 
   __ divw(result, dividend, divisor, SetOE, SetRC);
 
   // Check for x / 0.
   if (hdiv->CheckFlag(HValue::kCanBeDivByZero)) {
     __ cmpwi(divisor, Operand::Zero());
-    DeoptimizeIf(eq, instr, Deoptimizer::kDivisionByZero);
+    DeoptimizeIf(eq, instr, "division by zero");
   }
 
   // Check for (0 / -x) that will produce negative zero.
   if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero)) {
     Label dividend_not_zero;
     __ cmpwi(dividend, Operand::Zero());
     __ bne(&dividend_not_zero);
     __ cmpwi(divisor, Operand::Zero());
-    DeoptimizeIf(lt, instr, Deoptimizer::kMinusZero);
+    DeoptimizeIf(lt, instr, "minus zero");
     __ bind(&dividend_not_zero);
   }
 
   // Check for (kMinInt / -1).
   if (hdiv->CheckFlag(HValue::kCanOverflow)) {
     Label no_overflow_possible;
     if (!hdiv->CheckFlag(HValue::kAllUsesTruncatingToInt32)) {
-      DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow, cr0);
+      DeoptimizeIf(overflow, instr, "overflow", cr0);
     } else {
       // When truncating, we want kMinInt / -1 = kMinInt.
       __ bnooverflow(&no_overflow_possible, cr0);
       __ mr(result, dividend);
     }
     __ bind(&no_overflow_possible);
   }
 
   Label done;
   Register scratch = scratch0();
@@ skipping 49 matching lines @@
       instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero);
   bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow);
 
   if (right_op->IsConstantOperand()) {
     int32_t constant = ToInteger32(LConstantOperand::cast(right_op));
 
     if (bailout_on_minus_zero && (constant < 0)) {
       // The case of a null constant will be handled separately.
       // If constant is negative and left is null, the result should be -0.
       __ cmpi(left, Operand::Zero());
-      DeoptimizeIf(eq, instr, Deoptimizer::kMinusZero);
+      DeoptimizeIf(eq, instr, "minus zero");
     }
 
     switch (constant) {
       case -1:
         if (can_overflow) {
 #if V8_TARGET_ARCH_PPC64
           if (instr->hydrogen()->representation().IsSmi()) {
 #endif
             __ li(r0, Operand::Zero());  // clear xer
             __ mtxer(r0);
             __ neg(result, left, SetOE, SetRC);
-            DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow, cr0);
+            DeoptimizeIf(overflow, instr, "overflow", cr0);
 #if V8_TARGET_ARCH_PPC64
           } else {
             __ neg(result, left);
             __ TestIfInt32(result, scratch, r0);
-            DeoptimizeIf(ne, instr, Deoptimizer::kOverflow);
+            DeoptimizeIf(ne, instr, "overflow");
           }
 #endif
         } else {
           __ neg(result, left);
         }
         break;
       case 0:
         if (bailout_on_minus_zero) {
 // If left is strictly negative and the constant is null, the
 // result is -0. Deoptimize if required, otherwise return 0.
 #if V8_TARGET_ARCH_PPC64
           if (instr->hydrogen()->representation().IsSmi()) {
 #endif
             __ cmpi(left, Operand::Zero());
 #if V8_TARGET_ARCH_PPC64
           } else {
             __ cmpwi(left, Operand::Zero());
           }
 #endif
-          DeoptimizeIf(lt, instr, Deoptimizer::kMinusZero);
+          DeoptimizeIf(lt, instr, "minus zero");
         }
         __ li(result, Operand::Zero());
         break;
       case 1:
         __ Move(result, left);
         break;
       default:
         // Multiplying by powers of two and powers of two plus or minus
         // one can be done faster with shifted operands.
         // For other constants we emit standard code.
@@ skipping 32 matching lines @@
 #if V8_TARGET_ARCH_PPC64
       // result = left * right.
       if (instr->hydrogen()->representation().IsSmi()) {
         __ SmiUntag(result, left);
         __ SmiUntag(scratch, right);
         __ Mul(result, result, scratch);
       } else {
         __ Mul(result, left, right);
       }
       __ TestIfInt32(result, scratch, r0);
-      DeoptimizeIf(ne, instr, Deoptimizer::kOverflow);
+      DeoptimizeIf(ne, instr, "overflow");
       if (instr->hydrogen()->representation().IsSmi()) {
         __ SmiTag(result);
       }
 #else
       // scratch:result = left * right.
       if (instr->hydrogen()->representation().IsSmi()) {
         __ SmiUntag(result, left);
         __ mulhw(scratch, result, right);
         __ mullw(result, result, right);
       } else {
         __ mulhw(scratch, left, right);
         __ mullw(result, left, right);
       }
       __ TestIfInt32(scratch, result, r0);
-      DeoptimizeIf(ne, instr, Deoptimizer::kOverflow);
+      DeoptimizeIf(ne, instr, "overflow");
 #endif
     } else {
       if (instr->hydrogen()->representation().IsSmi()) {
         __ SmiUntag(result, left);
         __ Mul(result, result, right);
       } else {
         __ Mul(result, left, right);
       }
     }
 
     if (bailout_on_minus_zero) {
       Label done;
 #if V8_TARGET_ARCH_PPC64
       if (instr->hydrogen()->representation().IsSmi()) {
 #endif
         __ xor_(r0, left, right, SetRC);
         __ bge(&done, cr0);
 #if V8_TARGET_ARCH_PPC64
       } else {
         __ xor_(r0, left, right);
         __ cmpwi(r0, Operand::Zero());
         __ bge(&done);
       }
 #endif
       // Bail out if the result is minus zero.
       __ cmpi(result, Operand::Zero());
-      DeoptimizeIf(eq, instr, Deoptimizer::kMinusZero);
+      DeoptimizeIf(eq, instr, "minus zero");
       __ bind(&done);
     }
   }
 }
 
 
 void LCodeGen::DoBitI(LBitI* instr) {
   LOperand* left_op = instr->left();
   LOperand* right_op = instr->right();
   DCHECK(left_op->IsRegister());
@@ skipping 65 matching lines @@
         break;
       case Token::SAR:
         __ sraw(result, left, scratch);
         break;
       case Token::SHR:
         if (instr->can_deopt()) {
           __ srw(result, left, scratch, SetRC);
 #if V8_TARGET_ARCH_PPC64
           __ extsw(result, result, SetRC);
 #endif
-          DeoptimizeIf(lt, instr, Deoptimizer::kNegativeValue, cr0);
+          DeoptimizeIf(lt, instr, "negative value", cr0);
         } else {
           __ srw(result, left, scratch);
         }
         break;
       case Token::SHL:
         __ slw(result, left, scratch);
 #if V8_TARGET_ARCH_PPC64
         __ extsw(result, result);
 #endif
         break;
@@ skipping 19 matching lines @@
         } else {
           __ Move(result, left);
         }
         break;
       case Token::SHR:
         if (shift_count != 0) {
           __ srwi(result, left, Operand(shift_count));
         } else {
           if (instr->can_deopt()) {
             __ cmpwi(left, Operand::Zero());
-            DeoptimizeIf(lt, instr, Deoptimizer::kNegativeValue);
+            DeoptimizeIf(lt, instr, "negative value");
           }
           __ Move(result, left);
         }
         break;
       case Token::SHL:
         if (shift_count != 0) {
 #if V8_TARGET_ARCH_PPC64
           if (instr->hydrogen_value()->representation().IsSmi()) {
             __ sldi(result, left, Operand(shift_count));
 #else
           if (instr->hydrogen_value()->representation().IsSmi() &&
               instr->can_deopt()) {
             if (shift_count != 1) {
               __ slwi(result, left, Operand(shift_count - 1));
               __ SmiTagCheckOverflow(result, result, scratch);
             } else {
               __ SmiTagCheckOverflow(result, left, scratch);
             }
-            DeoptimizeIf(lt, instr, Deoptimizer::kOverflow, cr0);
+            DeoptimizeIf(lt, instr, "overflow", cr0);
 #endif
           } else {
             __ slwi(result, left, Operand(shift_count));
 #if V8_TARGET_ARCH_PPC64
             __ extsw(result, result);
 #endif
           }
         } else {
           __ Move(result, left);
         }
@@ skipping 24 matching lines @@
     } else {
       __ SubAndCheckForOverflow(result, left, EmitLoadRegister(right, ip),
                                 scratch0(), r0);
     }
 // Doptimize on overflow
 #if V8_TARGET_ARCH_PPC64
     if (!instr->hydrogen()->representation().IsSmi()) {
       __ extsw(scratch0(), scratch0(), SetRC);
     }
 #endif
-    DeoptimizeIf(lt, instr, Deoptimizer::kOverflow, cr0);
+    DeoptimizeIf(lt, instr, "overflow", cr0);
   }
 
 #if V8_TARGET_ARCH_PPC64
   if (!instr->hydrogen()->representation().IsSmi()) {
     __ extsw(result, result);
   }
 #endif
 }
 
 
@@ skipping 59 matching lines @@
   Register result = ToRegister(instr->result());
   Register scratch = ToRegister(instr->temp());
   Smi* index = instr->index();
   Label runtime, done;
   DCHECK(object.is(result));
   DCHECK(object.is(r3));
   DCHECK(!scratch.is(scratch0()));
   DCHECK(!scratch.is(object));
 
   __ TestIfSmi(object, r0);
-  DeoptimizeIf(eq, instr, Deoptimizer::kSmi, cr0);
+  DeoptimizeIf(eq, instr, "Smi", cr0);
   __ CompareObjectType(object, scratch, scratch, JS_DATE_TYPE);
-  DeoptimizeIf(ne, instr, Deoptimizer::kNotADateObject);
+  DeoptimizeIf(ne, instr, "not a date object");
 
   if (index->value() == 0) {
     __ LoadP(result, FieldMemOperand(object, JSDate::kValueOffset));
   } else {
     if (index->value() < JSDate::kFirstUncachedField) {
       ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
       __ mov(scratch, Operand(stamp));
       __ LoadP(scratch, MemOperand(scratch));
       __ LoadP(scratch0(), FieldMemOperand(object, JSDate::kCacheStampOffset));
       __ cmp(scratch, scratch0());
@@ skipping 113 matching lines @@
     } else {
       __ AddAndCheckForOverflow(result, left, EmitLoadRegister(right, ip),
                                 scratch0(), r0);
     }
 // Doptimize on overflow
 #if V8_TARGET_ARCH_PPC64
     if (isInteger) {
       __ extsw(scratch0(), scratch0(), SetRC);
     }
 #endif
-    DeoptimizeIf(lt, instr, Deoptimizer::kOverflow, cr0);
+    DeoptimizeIf(lt, instr, "overflow", cr0);
   }
 
 #if V8_TARGET_ARCH_PPC64
   if (isInteger) {
     __ extsw(result, result);
   }
 #endif
 }
 
 
@@ skipping 221 matching lines @@
       }
 
       if (expected.Contains(ToBooleanStub::SMI)) {
         // Smis: 0 -> false, all other -> true.
         __ cmpi(reg, Operand::Zero());
         __ beq(instr->FalseLabel(chunk_));
         __ JumpIfSmi(reg, instr->TrueLabel(chunk_));
       } else if (expected.NeedsMap()) {
         // If we need a map later and have a Smi -> deopt.
         __ TestIfSmi(reg, r0);
-        DeoptimizeIf(eq, instr, Deoptimizer::kSmi, cr0);
+        DeoptimizeIf(eq, instr, "Smi", cr0);
       }
 
       const Register map = scratch0();
       if (expected.NeedsMap()) {
         __ LoadP(map, FieldMemOperand(reg, HeapObject::kMapOffset));
 
         if (expected.CanBeUndetectable()) {
           // Undetectable -> false.
           __ lbz(ip, FieldMemOperand(map, Map::kBitFieldOffset));
           __ TestBit(ip, Map::kIsUndetectable, r0);
@@ skipping 36 matching lines @@
         __ mfcr(r0);
         __ andi(r0, r0, Operand(crZOrNaNBits));
         __ bne(instr->FalseLabel(chunk_), cr0);
         __ b(instr->TrueLabel(chunk_));
         __ bind(&not_heap_number);
       }
 
       if (!expected.IsGeneric()) {
         // We've seen something for the first time -> deopt.
         // This can only happen if we are not generic already.
-        DeoptimizeIf(al, instr, Deoptimizer::kUnexpectedObject);
+        DeoptimizeIf(al, instr, "unexpected object");
       }
     }
   }
 }
 
 
 void LCodeGen::EmitGoto(int block) {
   if (!IsNextEmittedBlock(block)) {
     __ b(chunk_->GetAssemblyLabel(LookupDestination(block)));
   }
@@ skipping 638 matching lines @@
 }
 
 
 void LCodeGen::DoLoadGlobalCell(LLoadGlobalCell* instr) {
   Register result = ToRegister(instr->result());
   __ mov(ip, Operand(Handle<Object>(instr->hydrogen()->cell().handle())));
   __ LoadP(result, FieldMemOperand(ip, Cell::kValueOffset));
   if (instr->hydrogen()->RequiresHoleCheck()) {
     __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
     __ cmp(result, ip);
-    DeoptimizeIf(eq, instr, Deoptimizer::kHole);
+    DeoptimizeIf(eq, instr, "hole");
   }
 }
 
 
 template <class T>
 void LCodeGen::EmitVectorLoadICRegisters(T* instr) {
   DCHECK(FLAG_vector_ics);
   Register vector = ToRegister(instr->temp_vector());
   DCHECK(vector.is(VectorLoadICDescriptor::VectorRegister()));
   __ Move(vector, instr->hydrogen()->feedback_vector());
@@ skipping 29 matching lines @@
 
   // If the cell we are storing to contains the hole it could have
   // been deleted from the property dictionary. In that case, we need
   // to update the property details in the property dictionary to mark
   // it as no longer deleted.
   if (instr->hydrogen()->RequiresHoleCheck()) {
     // We use a temp to check the payload (CompareRoot might clobber ip).
     Register payload = ToRegister(instr->temp());
     __ LoadP(payload, FieldMemOperand(cell, Cell::kValueOffset));
     __ CompareRoot(payload, Heap::kTheHoleValueRootIndex);
-    DeoptimizeIf(eq, instr, Deoptimizer::kHole);
+    DeoptimizeIf(eq, instr, "hole");
   }
 
   // Store the value.
   __ StoreP(value, FieldMemOperand(cell, Cell::kValueOffset), r0);
   // Cells are always rescanned, so no write barrier here.
 }
 
 
 void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) {
   Register context = ToRegister(instr->context());
   Register result = ToRegister(instr->result());
   __ LoadP(result, ContextOperand(context, instr->slot_index()));
   if (instr->hydrogen()->RequiresHoleCheck()) {
     __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
     __ cmp(result, ip);
     if (instr->hydrogen()->DeoptimizesOnHole()) {
-      DeoptimizeIf(eq, instr, Deoptimizer::kHole);
+      DeoptimizeIf(eq, instr, "hole");
     } else {
       Label skip;
       __ bne(&skip);
       __ mov(result, Operand(factory()->undefined_value()));
       __ bind(&skip);
     }
   }
 }
 
 
 void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) {
   Register context = ToRegister(instr->context());
   Register value = ToRegister(instr->value());
   Register scratch = scratch0();
   MemOperand target = ContextOperand(context, instr->slot_index());
 
   Label skip_assignment;
 
   if (instr->hydrogen()->RequiresHoleCheck()) {
     __ LoadP(scratch, target);
     __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
     __ cmp(scratch, ip);
     if (instr->hydrogen()->DeoptimizesOnHole()) {
-      DeoptimizeIf(eq, instr, Deoptimizer::kHole);
+      DeoptimizeIf(eq, instr, "hole");
     } else {
       __ bne(&skip_assignment);
     }
   }
 
   __ StoreP(value, target, r0);
   if (instr->hydrogen()->NeedsWriteBarrier()) {
     SmiCheck check_needed = instr->hydrogen()->value()->type().IsHeapObject()
                                 ? OMIT_SMI_CHECK
                                 : INLINE_SMI_CHECK;
@@ skipping 71 matching lines @@
   Register function = ToRegister(instr->function());
   Register result = ToRegister(instr->result());
 
   // Get the prototype or initial map from the function.
   __ LoadP(result,
            FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset));
 
   // Check that the function has a prototype or an initial map.
   __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
   __ cmp(result, ip);
-  DeoptimizeIf(eq, instr, Deoptimizer::kHole);
+  DeoptimizeIf(eq, instr, "hole");
 
   // If the function does not have an initial map, we're done.
   Label done;
   __ CompareObjectType(result, scratch, scratch, MAP_TYPE);
   __ bne(&done);
 
   // Get the prototype from the initial map.
   __ LoadP(result, FieldMemOperand(result, Map::kPrototypeOffset));
 
   // All done.
@@ skipping 139 matching lines @@
       case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
         if (key_is_constant) {
           __ LoadWord(result, mem_operand, r0);
         } else {
           __ lwzx(result, mem_operand);
         }
         if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
           __ lis(r0, Operand(SIGN_EXT_IMM16(0x8000)));
           __ cmplw(result, r0);
-          DeoptimizeIf(ge, instr, Deoptimizer::kNegativeValue);
+          DeoptimizeIf(ge, instr, "negative value");
         }
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
       case EXTERNAL_FLOAT32_ELEMENTS:
       case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_HOLEY_DOUBLE_ELEMENTS:
       case FAST_HOLEY_ELEMENTS:
       case FAST_HOLEY_SMI_ELEMENTS:
       case FAST_DOUBLE_ELEMENTS:
@@ skipping 42 matching lines @@
 
   if (instr->hydrogen()->RequiresHoleCheck()) {
     if (is_int16(base_offset + Register::kExponentOffset)) {
       __ lwz(scratch,
              MemOperand(elements, base_offset + Register::kExponentOffset));
     } else {
       __ addi(scratch, elements, Operand(base_offset));
       __ lwz(scratch, MemOperand(scratch, Register::kExponentOffset));
     }
     __ Cmpi(scratch, Operand(kHoleNanUpper32), r0);
-    DeoptimizeIf(eq, instr, Deoptimizer::kHole);
+    DeoptimizeIf(eq, instr, "hole");
   }
 }
 
 
 void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
   HLoadKeyed* hinstr = instr->hydrogen();
   Register elements = ToRegister(instr->elements());
   Register result = ToRegister(instr->result());
   Register scratch = scratch0();
   Register store_base = scratch;
@@ skipping 34 matching lines @@
   }
 #endif
 
   __ LoadRepresentation(result, MemOperand(store_base, offset), representation,
                         r0);
 
   // Check for the hole value.
   if (requires_hole_check) {
     if (IsFastSmiElementsKind(hinstr->elements_kind())) {
       __ TestIfSmi(result, r0);
-      DeoptimizeIf(ne, instr, Deoptimizer::kNotASmi, cr0);
+      DeoptimizeIf(ne, instr, "not a Smi", cr0);
     } else {
       __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex);
       __ cmp(result, scratch);
-      DeoptimizeIf(eq, instr, Deoptimizer::kHole);
+      DeoptimizeIf(eq, instr, "hole");
     }
   }
 }
 
 
 void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
   if (instr->is_typed_elements()) {
     DoLoadKeyedExternalArray(instr);
   } else if (instr->hydrogen()->representation().IsDouble()) {
     DoLoadKeyedFixedDoubleArray(instr);
@@ skipping 138 matching lines @@
   // Normal function. Replace undefined or null with global receiver.
   __ LoadRoot(scratch, Heap::kNullValueRootIndex);
   __ cmp(receiver, scratch);
   __ beq(&global_object);
   __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex);
   __ cmp(receiver, scratch);
   __ beq(&global_object);
 
   // Deoptimize if the receiver is not a JS object.
   __ TestIfSmi(receiver, r0);
-  DeoptimizeIf(eq, instr, Deoptimizer::kSmi);
+  DeoptimizeIf(eq, instr, "Smi");
   __ CompareObjectType(receiver, scratch, scratch, FIRST_SPEC_OBJECT_TYPE);
-  DeoptimizeIf(lt, instr, Deoptimizer::kNotAJavaScriptObject);
+  DeoptimizeIf(lt, instr, "not a JavaScript object");
 
   __ b(&result_in_receiver);
   __ bind(&global_object);
   __ LoadP(result, FieldMemOperand(function, JSFunction::kContextOffset));
   __ LoadP(result, ContextOperand(result, Context::GLOBAL_OBJECT_INDEX));
   __ LoadP(result, FieldMemOperand(result, GlobalObject::kGlobalProxyOffset));
   if (result.is(receiver)) {
     __ bind(&result_in_receiver);
   } else {
     Label result_ok;
@@ skipping 12 matching lines @@
   Register elements = ToRegister(instr->elements());
   Register scratch = scratch0();
   DCHECK(receiver.is(r3));  // Used for parameter count.
   DCHECK(function.is(r4));  // Required by InvokeFunction.
   DCHECK(ToRegister(instr->result()).is(r3));
 
   // Copy the arguments to this function possibly from the
   // adaptor frame below it.
   const uint32_t kArgumentsLimit = 1 * KB;
   __ cmpli(length, Operand(kArgumentsLimit));
-  DeoptimizeIf(gt, instr, Deoptimizer::kTooManyArguments);
+  DeoptimizeIf(gt, instr, "too many arguments");
 
   // Push the receiver and use the register to keep the original
   // number of arguments.
   __ push(receiver);
   __ mr(receiver, length);
   // The arguments are at a one pointer size offset from elements.
   __ addi(elements, elements, Operand(1 * kPointerSize));
 
   // Loop through the arguments pushing them onto the execution
   // stack.
@@ skipping 112 matching lines @@
   DCHECK(instr->context() != NULL);
   DCHECK(ToRegister(instr->context()).is(cp));
   Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   Register scratch = scratch0();
 
   // Deoptimize if not a heap number.
   __ LoadP(scratch, FieldMemOperand(input, HeapObject::kMapOffset));
   __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex);
   __ cmp(scratch, ip);
-  DeoptimizeIf(ne, instr, Deoptimizer::kNotAHeapNumber);
+  DeoptimizeIf(ne, instr, "not a heap number");
 
   Label done;
   Register exponent = scratch0();
   scratch = no_reg;
   __ lwz(exponent, FieldMemOperand(input, HeapNumber::kExponentOffset));
   // Check the sign of the argument. If the argument is positive, just
   // return it.
   __ cmpwi(exponent, Operand::Zero());
   // Move the input to the result if necessary.
   __ Move(result, input);
@@ skipping 49 matching lines @@
   Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   Label done;
   __ cmpi(input, Operand::Zero());
   __ Move(result, input);
   __ bge(&done);
   __ li(r0, Operand::Zero());  // clear xer
   __ mtxer(r0);
   __ neg(result, result, SetOE, SetRC);
   // Deoptimize on overflow.
-  DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow, cr0);
+  DeoptimizeIf(overflow, instr, "overflow", cr0);
   __ bind(&done);
 }
 
 
 #if V8_TARGET_ARCH_PPC64
 void LCodeGen::EmitInteger32MathAbs(LMathAbs* instr) {
   Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   Label done;
   __ cmpwi(input, Operand::Zero());
   __ Move(result, input);
   __ bge(&done);
 
   // Deoptimize on overflow.
   __ lis(r0, Operand(SIGN_EXT_IMM16(0x8000)));
   __ cmpw(input, r0);
-  DeoptimizeIf(eq, instr, Deoptimizer::kOverflow);
+  DeoptimizeIf(eq, instr, "overflow");
 
   __ neg(result, result);
   __ bind(&done);
 }
 #endif
 
 
 void LCodeGen::DoMathAbs(LMathAbs* instr) {
   // Class for deferred case.
   class DeferredMathAbsTaggedHeapNumber FINAL : public LDeferredCode {
@@ skipping 38 matching lines @@
 
 void LCodeGen::DoMathFloor(LMathFloor* instr) {
   DoubleRegister input = ToDoubleRegister(instr->value());
   Register result = ToRegister(instr->result());
   Register input_high = scratch0();
   Register scratch = ip;
   Label done, exact;
 
   __ TryInt32Floor(result, input, input_high, scratch, double_scratch0(), &done,
                    &exact);
-  DeoptimizeIf(al, instr, Deoptimizer::kLostPrecisionOrNaN);
+  DeoptimizeIf(al, instr, "lost precision or NaN");
 
   __ bind(&exact);
   if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
     // Test for -0.
     __ cmpi(result, Operand::Zero());
     __ bne(&done);
     __ cmpwi(input_high, Operand::Zero());
-    DeoptimizeIf(lt, instr, Deoptimizer::kMinusZero);
+    DeoptimizeIf(lt, instr, "minus zero");
   }
   __ bind(&done);
 }
 
 
 void LCodeGen::DoMathRound(LMathRound* instr) {
   DoubleRegister input = ToDoubleRegister(instr->value());
   Register result = ToRegister(instr->result());
   DoubleRegister double_scratch1 = ToDoubleRegister(instr->temp());
   DoubleRegister input_plus_dot_five = double_scratch1;
   Register scratch1 = scratch0();
   Register scratch2 = ip;
   DoubleRegister dot_five = double_scratch0();
   Label convert, done;
 
   __ LoadDoubleLiteral(dot_five, 0.5, r0);
   __ fabs(double_scratch1, input);
   __ fcmpu(double_scratch1, dot_five);
-  DeoptimizeIf(unordered, instr, Deoptimizer::kLostPrecisionOrNaN);
+  DeoptimizeIf(unordered, instr, "lost precision or NaN");
   // If input is in [-0.5, -0], the result is -0.
   // If input is in [+0, +0.5[, the result is +0.
   // If the input is +0.5, the result is 1.
   __ bgt(&convert);  // Out of [-0.5, +0.5].
   if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
 #if V8_TARGET_ARCH_PPC64
     __ MovDoubleToInt64(scratch1, input);
 #else
     __ MovDoubleHighToInt(scratch1, input);
 #endif
     __ cmpi(scratch1, Operand::Zero());
     // [-0.5, -0].
-    DeoptimizeIf(lt, instr, Deoptimizer::kMinusZero);
+    DeoptimizeIf(lt, instr, "minus zero");
   }
   Label return_zero;
   __ fcmpu(input, dot_five);
   __ bne(&return_zero);
   __ li(result, Operand(1));  // +0.5.
   __ b(&done);
   // Remaining cases: [+0, +0.5[ or [-0.5, +0.5[, depending on
   // flag kBailoutOnMinusZero.
   __ bind(&return_zero);
   __ li(result, Operand::Zero());
   __ b(&done);
 
   __ bind(&convert);
   __ fadd(input_plus_dot_five, input, dot_five);
   // Reuse dot_five (double_scratch0) as we no longer need this value.
   __ TryInt32Floor(result, input_plus_dot_five, scratch1, scratch2,
                    double_scratch0(), &done, &done);
-  DeoptimizeIf(al, instr, Deoptimizer::kLostPrecisionOrNaN);
+  DeoptimizeIf(al, instr, "lost precision or NaN");
   __ bind(&done);
 }
 
 
 void LCodeGen::DoMathFround(LMathFround* instr) {
   DoubleRegister input_reg = ToDoubleRegister(instr->value());
   DoubleRegister output_reg = ToDoubleRegister(instr->result());
   __ frsp(output_reg, input_reg);
 }
 
@@ skipping 45 matching lines @@
 
   if (exponent_type.IsSmi()) {
     MathPowStub stub(isolate(), MathPowStub::TAGGED);
     __ CallStub(&stub);
   } else if (exponent_type.IsTagged()) {
     Label no_deopt;
     __ JumpIfSmi(r5, &no_deopt);
     __ LoadP(r10, FieldMemOperand(r5, HeapObject::kMapOffset));
     __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex);
     __ cmp(r10, ip);
-    DeoptimizeIf(ne, instr, Deoptimizer::kNotAHeapNumber);
+    DeoptimizeIf(ne, instr, "not a heap number");
     __ bind(&no_deopt);
     MathPowStub stub(isolate(), MathPowStub::TAGGED);
     __ CallStub(&stub);
   } else if (exponent_type.IsInteger32()) {
     MathPowStub stub(isolate(), MathPowStub::INTEGER);
     __ CallStub(&stub);
   } else {
     DCHECK(exponent_type.IsDouble());
     MathPowStub stub(isolate(), MathPowStub::DOUBLE);
     __ CallStub(&stub);
@@ skipping 358 matching lines @@
     } else {
       __ cmplw(length, index);
     }
   }
   if (FLAG_debug_code && instr->hydrogen()->skip_check()) {
     Label done;
     __ b(NegateCondition(cc), &done);
     __ stop("eliminated bounds check failed");
     __ bind(&done);
   } else {
-    DeoptimizeIf(cc, instr, Deoptimizer::kOutOfBounds);
+    DeoptimizeIf(cc, instr, "out of bounds");
   }
 }
 
 
 void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
   Register external_pointer = ToRegister(instr->elements());
   Register key = no_reg;
   ElementsKind elements_kind = instr->elements_kind();
   bool key_is_constant = instr->key()->IsConstantOperand();
   int constant_key = 0;
@@ skipping 252 matching lines @@
   }
   __ bind(&not_applicable);
 }
 
 
 void LCodeGen::DoTrapAllocationMemento(LTrapAllocationMemento* instr) {
   Register object = ToRegister(instr->object());
   Register temp = ToRegister(instr->temp());
   Label no_memento_found;
   __ TestJSArrayForAllocationMemento(object, temp, &no_memento_found);
-  DeoptimizeIf(eq, instr, Deoptimizer::kMementoFound);
+  DeoptimizeIf(eq, instr, "memento found");
   __ bind(&no_memento_found);
 }
 
 
 void LCodeGen::DoStringAdd(LStringAdd* instr) {
   DCHECK(ToRegister(instr->context()).is(cp));
   DCHECK(ToRegister(instr->left()).is(r4));
   DCHECK(ToRegister(instr->right()).is(r3));
   StringAddStub stub(isolate(), instr->hydrogen()->flags(),
                      instr->hydrogen()->pretenure_flag());
@@ skipping 294 matching lines @@
 }
 
 
 void LCodeGen::DoSmiTag(LSmiTag* instr) {
   HChange* hchange = instr->hydrogen();
   Register input = ToRegister(instr->value());
   Register output = ToRegister(instr->result());
   if (hchange->CheckFlag(HValue::kCanOverflow) &&
       hchange->value()->CheckFlag(HValue::kUint32)) {
     __ TestUnsignedSmiCandidate(input, r0);
-    DeoptimizeIf(ne, instr, Deoptimizer::kOverflow, cr0);
+    DeoptimizeIf(ne, instr, "overflow", cr0);
   }
 #if !V8_TARGET_ARCH_PPC64
   if (hchange->CheckFlag(HValue::kCanOverflow) &&
       !hchange->value()->CheckFlag(HValue::kUint32)) {
     __ SmiTagCheckOverflow(output, input, r0);
-    DeoptimizeIf(lt, instr, Deoptimizer::kOverflow, cr0);
+    DeoptimizeIf(lt, instr, "overflow", cr0);
   } else {
 #endif
     __ SmiTag(output, input);
 #if !V8_TARGET_ARCH_PPC64
   }
 #endif
 }
 
 
 void LCodeGen::DoSmiUntag(LSmiUntag* instr) {
   Register scratch = scratch0();
   Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   if (instr->needs_check()) {
     STATIC_ASSERT(kHeapObjectTag == 1);
     // If the input is a HeapObject, value of scratch won't be zero.
     __ andi(scratch, input, Operand(kHeapObjectTag));
     __ SmiUntag(result, input);
-    DeoptimizeIf(ne, instr, Deoptimizer::kNotASmi, cr0);
+    DeoptimizeIf(ne, instr, "not a Smi", cr0);
   } else {
     __ SmiUntag(result, input);
   }
 }
 
 
 void LCodeGen::EmitNumberUntagD(LNumberUntagD* instr, Register input_reg,
                                 DoubleRegister result_reg,
                                 NumberUntagDMode mode) {
   bool can_convert_undefined_to_nan =
       instr->hydrogen()->can_convert_undefined_to_nan();
   bool deoptimize_on_minus_zero = instr->hydrogen()->deoptimize_on_minus_zero();
 
   Register scratch = scratch0();
   DCHECK(!result_reg.is(double_scratch0()));
 
   Label convert, load_smi, done;
 
   if (mode == NUMBER_CANDIDATE_IS_ANY_TAGGED) {
     // Smi check.
     __ UntagAndJumpIfSmi(scratch, input_reg, &load_smi);
 
     // Heap number map check.
     __ LoadP(scratch, FieldMemOperand(input_reg, HeapObject::kMapOffset));
     __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex);
     __ cmp(scratch, ip);
     if (can_convert_undefined_to_nan) {
       __ bne(&convert);
     } else {
-      DeoptimizeIf(ne, instr, Deoptimizer::kNotAHeapNumber);
+      DeoptimizeIf(ne, instr, "not a heap number");
     }
     // load heap number
     __ lfd(result_reg, FieldMemOperand(input_reg, HeapNumber::kValueOffset));
     if (deoptimize_on_minus_zero) {
 #if V8_TARGET_ARCH_PPC64
       __ MovDoubleToInt64(scratch, result_reg);
       // rotate left by one for simple compare.
       __ rldicl(scratch, scratch, 1, 0);
       __ cmpi(scratch, Operand(1));
 #else
       __ MovDoubleToInt64(scratch, ip, result_reg);
       __ cmpi(ip, Operand::Zero());
       __ bne(&done);
       __ Cmpi(scratch, Operand(HeapNumber::kSignMask), r0);
 #endif
-      DeoptimizeIf(eq, instr, Deoptimizer::kMinusZero);
+      DeoptimizeIf(eq, instr, "minus zero");
     }
     __ b(&done);
     if (can_convert_undefined_to_nan) {
       __ bind(&convert);
       // Convert undefined (and hole) to NaN.
       __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
       __ cmp(input_reg, ip);
-      DeoptimizeIf(ne, instr, Deoptimizer::kNotAHeapNumberUndefined);
+      DeoptimizeIf(ne, instr, "not a heap number/undefined");
       __ LoadRoot(scratch, Heap::kNanValueRootIndex);
       __ lfd(result_reg, FieldMemOperand(scratch, HeapNumber::kValueOffset));
       __ b(&done);
     }
   } else {
     __ SmiUntag(scratch, input_reg);
     DCHECK(mode == NUMBER_CANDIDATE_IS_SMI);
   }
   // Smi to double register conversion
   __ bind(&load_smi);
@@ skipping 41 matching lines @@
     __ bind(&check_bools);
     __ LoadRoot(ip, Heap::kTrueValueRootIndex);
     __ cmp(input_reg, ip);
     __ bne(&check_false);
     __ li(input_reg, Operand(1));
     __ b(&done);
 
     __ bind(&check_false);
     __ LoadRoot(ip, Heap::kFalseValueRootIndex);
     __ cmp(input_reg, ip);
-    DeoptimizeIf(ne, instr, Deoptimizer::kNotAHeapNumberUndefinedTrueFalse,
-                 cr7);
+    DeoptimizeIf(ne, instr, "not a heap number/undefined/true/false", cr7);
     __ li(input_reg, Operand::Zero());
   } else {
-    DeoptimizeIf(ne, instr, Deoptimizer::kNotAHeapNumber, cr7);
+    DeoptimizeIf(ne, instr, "not a heap number", cr7);
 
     __ lfd(double_scratch2,
            FieldMemOperand(input_reg, HeapNumber::kValueOffset));
     if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
       // preserve heap number pointer in scratch2 for minus zero check below
       __ mr(scratch2, input_reg);
     }
     __ TryDoubleToInt32Exact(input_reg, double_scratch2, scratch1,
                              double_scratch);
-    DeoptimizeIf(ne, instr, Deoptimizer::kLostPrecisionOrNaN, cr7);
+    DeoptimizeIf(ne, instr, "lost precision or NaN", cr7);
 
     if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
       __ cmpi(input_reg, Operand::Zero());
       __ bne(&done);
       __ lwz(scratch1,
              FieldMemOperand(scratch2, HeapNumber::kValueOffset +
                                            Register::kExponentOffset));
       __ cmpwi(scratch1, Operand::Zero());
-      DeoptimizeIf(lt, instr, Deoptimizer::kMinusZero, cr7);
+      DeoptimizeIf(lt, instr, "minus zero", cr7);
     }
   }
   __ bind(&done);
 }
 
 
 void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
   class DeferredTaggedToI FINAL : public LDeferredCode {
    public:
     DeferredTaggedToI(LCodeGen* codegen, LTaggedToI* instr)
@@ skipping 48 matching lines @@
   Register scratch1 = scratch0();
   DoubleRegister double_input = ToDoubleRegister(instr->value());
   DoubleRegister double_scratch = double_scratch0();
 
   if (instr->truncating()) {
     __ TruncateDoubleToI(result_reg, double_input);
   } else {
     __ TryDoubleToInt32Exact(result_reg, double_input, scratch1,
                              double_scratch);
     // Deoptimize if the input wasn't a int32 (inside a double).
-    DeoptimizeIf(ne, instr, Deoptimizer::kLostPrecisionOrNaN);
+    DeoptimizeIf(ne, instr, "lost precision or NaN");
     if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
       Label done;
       __ cmpi(result_reg, Operand::Zero());
       __ bne(&done);
 #if V8_TARGET_ARCH_PPC64
       __ MovDoubleToInt64(scratch1, double_input);
 #else
       __ MovDoubleHighToInt(scratch1, double_input);
 #endif
       __ cmpi(scratch1, Operand::Zero());
-      DeoptimizeIf(lt, instr, Deoptimizer::kMinusZero);
+      DeoptimizeIf(lt, instr, "minus zero");
       __ bind(&done);
     }
   }
 }
 
 
 void LCodeGen::DoDoubleToSmi(LDoubleToSmi* instr) {
   Register result_reg = ToRegister(instr->result());
   Register scratch1 = scratch0();
   DoubleRegister double_input = ToDoubleRegister(instr->value());
   DoubleRegister double_scratch = double_scratch0();
 
   if (instr->truncating()) {
     __ TruncateDoubleToI(result_reg, double_input);
   } else {
     __ TryDoubleToInt32Exact(result_reg, double_input, scratch1,
                              double_scratch);
     // Deoptimize if the input wasn't a int32 (inside a double).
-    DeoptimizeIf(ne, instr, Deoptimizer::kLostPrecisionOrNaN);
+    DeoptimizeIf(ne, instr, "lost precision or NaN");
     if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
       Label done;
       __ cmpi(result_reg, Operand::Zero());
       __ bne(&done);
 #if V8_TARGET_ARCH_PPC64
       __ MovDoubleToInt64(scratch1, double_input);
 #else
       __ MovDoubleHighToInt(scratch1, double_input);
 #endif
       __ cmpi(scratch1, Operand::Zero());
-      DeoptimizeIf(lt, instr, Deoptimizer::kMinusZero);
+      DeoptimizeIf(lt, instr, "minus zero");
       __ bind(&done);
     }
   }
 #if V8_TARGET_ARCH_PPC64
   __ SmiTag(result_reg);
 #else
   __ SmiTagCheckOverflow(result_reg, r0);
-  DeoptimizeIf(lt, instr, Deoptimizer::kOverflow, cr0);
+  DeoptimizeIf(lt, instr, "overflow", cr0);
 #endif
 }
 
 
 void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
   LOperand* input = instr->value();
   __ TestIfSmi(ToRegister(input), r0);
-  DeoptimizeIf(ne, instr, Deoptimizer::kNotASmi, cr0);
+  DeoptimizeIf(ne, instr, "not a Smi", cr0);
 }
 
 
 void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) {
   if (!instr->hydrogen()->value()->type().IsHeapObject()) {
     LOperand* input = instr->value();
     __ TestIfSmi(ToRegister(input), r0);
-    DeoptimizeIf(eq, instr, Deoptimizer::kSmi, cr0);
+    DeoptimizeIf(eq, instr, "Smi", cr0);
   }
 }
 
 
 void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) {
   Register input = ToRegister(instr->value());
   Register scratch = scratch0();
 
   __ LoadP(scratch, FieldMemOperand(input, HeapObject::kMapOffset));
   __ lbz(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset));
 
   if (instr->hydrogen()->is_interval_check()) {
     InstanceType first;
     InstanceType last;
     instr->hydrogen()->GetCheckInterval(&first, &last);
 
     __ cmpli(scratch, Operand(first));
 
     // If there is only one type in the interval check for equality.
     if (first == last) {
-      DeoptimizeIf(ne, instr, Deoptimizer::kWrongInstanceType);
+      DeoptimizeIf(ne, instr, "wrong instance type");
     } else {
-      DeoptimizeIf(lt, instr, Deoptimizer::kWrongInstanceType);
+      DeoptimizeIf(lt, instr, "wrong instance type");
       // Omit check for the last type.
       if (last != LAST_TYPE) {
         __ cmpli(scratch, Operand(last));
-        DeoptimizeIf(gt, instr, Deoptimizer::kWrongInstanceType);
+        DeoptimizeIf(gt, instr, "wrong instance type");
       }
     }
   } else {
     uint8_t mask;
     uint8_t tag;
     instr->hydrogen()->GetCheckMaskAndTag(&mask, &tag);
 
     if (base::bits::IsPowerOfTwo32(mask)) {
       DCHECK(tag == 0 || base::bits::IsPowerOfTwo32(tag));
       __ andi(r0, scratch, Operand(mask));
-      DeoptimizeIf(tag == 0 ? ne : eq, instr, Deoptimizer::kWrongInstanceType,
-                   cr0);
+      DeoptimizeIf(tag == 0 ? ne : eq, instr, "wrong instance type", cr0);
     } else {
       __ andi(scratch, scratch, Operand(mask));
       __ cmpi(scratch, Operand(tag));
-      DeoptimizeIf(ne, instr, Deoptimizer::kWrongInstanceType);
+      DeoptimizeIf(ne, instr, "wrong instance type");
     }
   }
 }
 
 
 void LCodeGen::DoCheckValue(LCheckValue* instr) {
   Register reg = ToRegister(instr->value());
   Handle<HeapObject> object = instr->hydrogen()->object().handle();
   AllowDeferredHandleDereference smi_check;
   if (isolate()->heap()->InNewSpace(*object)) {
     Register reg = ToRegister(instr->value());
     Handle<Cell> cell = isolate()->factory()->NewCell(object);
     __ mov(ip, Operand(Handle<Object>(cell)));
     __ LoadP(ip, FieldMemOperand(ip, Cell::kValueOffset));
     __ cmp(reg, ip);
   } else {
     __ Cmpi(reg, Operand(object), r0);
   }
-  DeoptimizeIf(ne, instr, Deoptimizer::kValueMismatch);
+  DeoptimizeIf(ne, instr, "value mismatch");
 }
 
 
 void LCodeGen::DoDeferredInstanceMigration(LCheckMaps* instr, Register object) {
   {
     PushSafepointRegistersScope scope(this);
     __ push(object);
     __ li(cp, Operand::Zero());
     __ CallRuntimeSaveDoubles(Runtime::kTryMigrateInstance);
     RecordSafepointWithRegisters(instr->pointer_map(), 1,
                                  Safepoint::kNoLazyDeopt);
     __ StoreToSafepointRegisterSlot(r3, scratch0());
   }
   __ TestIfSmi(scratch0(), r0);
-  DeoptimizeIf(eq, instr, Deoptimizer::kInstanceMigrationFailed, cr0);
+  DeoptimizeIf(eq, instr, "instance migration failed", cr0);
 }
 
 
 void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
   class DeferredCheckMaps FINAL : public LDeferredCode {
    public:
     DeferredCheckMaps(LCodeGen* codegen, LCheckMaps* instr, Register object)
         : LDeferredCode(codegen), instr_(instr), object_(object) {
       SetExit(check_maps());
     }
@@ skipping 37 matching lines @@
     Handle<Map> map = maps->at(i).handle();
     __ CompareMap(map_reg, map, &success);
     __ beq(&success);
   }
 
   Handle<Map> map = maps->at(maps->size() - 1).handle();
   __ CompareMap(map_reg, map, &success);
   if (instr->hydrogen()->HasMigrationTarget()) {
     __ bne(deferred->entry());
   } else {
-    DeoptimizeIf(ne, instr, Deoptimizer::kWrongMap);
+    DeoptimizeIf(ne, instr, "wrong map");
   }
 
   __ bind(&success);
 }
 
 
 void LCodeGen::DoClampDToUint8(LClampDToUint8* instr) {
   DoubleRegister value_reg = ToDoubleRegister(instr->unclamped());
   Register result_reg = ToRegister(instr->result());
   __ ClampDoubleToUint8(result_reg, value_reg, double_scratch0());
@@ skipping 18 matching lines @@
   __ UntagAndJumpIfSmi(result_reg, input_reg, &is_smi);
 
   // Check for heap number
   __ LoadP(scratch, FieldMemOperand(input_reg, HeapObject::kMapOffset));
   __ Cmpi(scratch, Operand(factory()->heap_number_map()), r0);
   __ beq(&heap_number);
 
   // Check for undefined. Undefined is converted to zero for clamping
   // conversions.
   __ Cmpi(input_reg, Operand(factory()->undefined_value()), r0);
-  DeoptimizeIf(ne, instr, Deoptimizer::kNotAHeapNumberUndefined);
+  DeoptimizeIf(ne, instr, "not a heap number/undefined");
   __ li(result_reg, Operand::Zero());
   __ b(&done);
 
   // Heap number
   __ bind(&heap_number);
   __ lfd(temp_reg, FieldMemOperand(input_reg, HeapNumber::kValueOffset));
   __ ClampDoubleToUint8(result_reg, temp_reg, double_scratch0());
   __ b(&done);
 
   // smi
@@ skipping 451 matching lines @@
   DCHECK(!environment->HasBeenRegistered());
   RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt);
 
   GenerateOsrPrologue();
 }
 
 
 void LCodeGen::DoForInPrepareMap(LForInPrepareMap* instr) {
   __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
   __ cmp(r3, ip);
-  DeoptimizeIf(eq, instr, Deoptimizer::kUndefined);
+  DeoptimizeIf(eq, instr, "undefined");
 
   Register null_value = r8;
   __ LoadRoot(null_value, Heap::kNullValueRootIndex);
   __ cmp(r3, null_value);
-  DeoptimizeIf(eq, instr, Deoptimizer::kNull);
+  DeoptimizeIf(eq, instr, "null");
 
   __ TestIfSmi(r3, r0);
-  DeoptimizeIf(eq, instr, Deoptimizer::kSmi, cr0);
+  DeoptimizeIf(eq, instr, "Smi", cr0);
 
   STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE);
   __ CompareObjectType(r3, r4, r4, LAST_JS_PROXY_TYPE);
-  DeoptimizeIf(le, instr, Deoptimizer::kWrongInstanceType);
+  DeoptimizeIf(le, instr, "wrong instance type");
 
   Label use_cache, call_runtime;
   __ CheckEnumCache(null_value, &call_runtime);
 
   __ LoadP(r3, FieldMemOperand(r3, HeapObject::kMapOffset));
   __ b(&use_cache);
 
   // Get the set of properties to enumerate.
   __ bind(&call_runtime);
   __ push(r3);
   CallRuntime(Runtime::kGetPropertyNamesFast, 1, instr);
 
   __ LoadP(r4, FieldMemOperand(r3, HeapObject::kMapOffset));
   __ LoadRoot(ip, Heap::kMetaMapRootIndex);
   __ cmp(r4, ip);
-  DeoptimizeIf(ne, instr, Deoptimizer::kWrongMap);
+  DeoptimizeIf(ne, instr, "wrong map");
   __ bind(&use_cache);
 }
 
 
 void LCodeGen::DoForInCacheArray(LForInCacheArray* instr) {
   Register map = ToRegister(instr->map());
   Register result = ToRegister(instr->result());
   Label load_cache, done;
   __ EnumLength(result, map);
   __ CmpSmiLiteral(result, Smi::FromInt(0), r0);
   __ bne(&load_cache);
   __ mov(result, Operand(isolate()->factory()->empty_fixed_array()));
   __ b(&done);
 
   __ bind(&load_cache);
   __ LoadInstanceDescriptors(map, result);
   __ LoadP(result, FieldMemOperand(result, DescriptorArray::kEnumCacheOffset));
   __ LoadP(result, FieldMemOperand(result, FixedArray::SizeFor(instr->idx())));
   __ cmpi(result, Operand::Zero());
-  DeoptimizeIf(eq, instr, Deoptimizer::kNoCache);
+  DeoptimizeIf(eq, instr, "no cache");
 
   __ bind(&done);
 }
 
 
 void LCodeGen::DoCheckMapValue(LCheckMapValue* instr) {
   Register object = ToRegister(instr->value());
   Register map = ToRegister(instr->map());
   __ LoadP(scratch0(), FieldMemOperand(object, HeapObject::kMapOffset));
   __ cmp(map, scratch0());
-  DeoptimizeIf(ne, instr, Deoptimizer::kWrongMap);
+  DeoptimizeIf(ne, instr, "wrong map");
 }
 
 
 void LCodeGen::DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr,
                                            Register result, Register object,
                                            Register index) {
   PushSafepointRegistersScope scope(this);
   __ Push(object, index);
   __ li(cp, Operand::Zero());
   __ CallRuntimeSaveDoubles(Runtime::kLoadMutableDouble);
@@ skipping 72 matching lines @@
   __ Push(scope_info);
   __ push(ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 }
 }  // namespace v8::internal