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Unified Diff: src/compiler/ia32/code-generator-ia32.cc

Issue 562033003: [Turbofan] Insert nops for lazy bailout patching, fix translation of literals. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Address review comments Created 6 years, 3 months ago
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Index: src/compiler/ia32/code-generator-ia32.cc
diff --git a/src/compiler/ia32/code-generator-ia32.cc b/src/compiler/ia32/code-generator-ia32.cc
index 034068789abb06b6b77b4564237cf8d906c7b060..200dcb66053fcd7de01c51274ffc44108c3a136b 100644
--- a/src/compiler/ia32/code-generator-ia32.cc
+++ b/src/compiler/ia32/code-generator-ia32.cc
@@ -112,6 +112,7 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
switch (ArchOpcodeField::decode(instr->opcode())) {
case kArchCallCodeObject: {
+ EnsureSpaceForLazyDeopt();
if (HasImmediateInput(instr, 0)) {
Handle<Code> code = Handle<Code>::cast(i.InputHeapObject(0));
__ call(code, RelocInfo::CODE_TARGET);
@@ -123,6 +124,7 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
break;
}
case kArchCallJSFunction: {
+ EnsureSpaceForLazyDeopt();
Register func = i.InputRegister(0);
if (FLAG_debug_code) {
// Check the function's context matches the context argument.
@@ -932,6 +934,21 @@ void CodeGenerator::AssembleSwap(InstructionOperand* source,
void CodeGenerator::AddNopForSmiCodeInlining() { __ nop(); }
+
+void CodeGenerator::EnsureSpaceForLazyDeopt() {
+ int space_needed = Deoptimizer::patch_size();
+ if (!linkage()->info()->IsStub()) {
+ // Ensure that we have enough space after the previous lazy-bailout
+ // instruction for patching the code here.
+ int current_pc = masm()->pc_offset();
+ if (current_pc < last_lazy_deopt_pc_ + space_needed) {
+ int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
+ __ Nop(padding_size);
+ }
+ }
+ MarkLazyDeoptSite();
+}
+
#undef __
} // namespace compiler
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