Don't assign safepoint at the definition to the definition's live-range.

runtime/vm/intermediate_language_ia32.cc

Index: runtime/vm/intermediate_language_ia32.cc
diff --git a/runtime/vm/intermediate_language_ia32.cc b/runtime/vm/intermediate_language_ia32.cc
index d292f311245c1522d3d839ab164fe8fd32dbab1d..39fc4756017f48e58c4ea28236828943276b4b32 100644
--- a/runtime/vm/intermediate_language_ia32.cc
+++ b/runtime/vm/intermediate_language_ia32.cc
@@ -1714,7 +1714,8 @@ class StoreInstanceFieldSlowPath : public SlowPathCode {
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
-    locs->live_registers()->Remove(locs->out(0));
+    locs->live_registers()->Remove(locs->temp(0));
+
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
                            &label,
@@ -2206,8 +2207,7 @@ class BoxDoubleSlowPath : public SlowPathCode {
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
-    locs->live_registers()->Remove(locs->out(0));
-
+    ASSERT(!locs->live_registers()->Contains(locs->out(0)));
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
                            &label,
@@ -2238,7 +2238,7 @@ class BoxFloat32x4SlowPath : public SlowPathCode {
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
-    locs->live_registers()->Remove(locs->out(0));
+    ASSERT(!locs->live_registers()->Contains(locs->out(0)));
 
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
@@ -2270,7 +2270,7 @@ class BoxFloat64x2SlowPath : public SlowPathCode {
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
-    locs->live_registers()->Remove(locs->out(0));
+    ASSERT(!locs->live_registers()->Contains(locs->out(0)));
 
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
@@ -2573,7 +2573,7 @@ class AllocateContextSlowPath : public SlowPathCode {
     __ Bind(entry_label());
 
     LocationSummary* locs = instruction_->locs();
-    locs->live_registers()->Remove(locs->out(0));
+    ASSERT(!locs->live_registers()->Contains(locs->out(0)));
 
     compiler->SaveLiveRegisters(locs);
 
@@ -3613,7 +3613,7 @@ class BoxInt32x4SlowPath : public SlowPathCode {
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
-    locs->live_registers()->Remove(locs->out(0));
+    ASSERT(!locs->live_registers()->Contains(locs->out(0)));
 
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
@@ -5695,7 +5695,7 @@ class BoxIntegerSlowPath : public SlowPathCode {
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
-    locs->live_registers()->Remove(locs->out(0));
+    ASSERT(!locs->live_registers()->Contains(locs->out(0)));
 
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.