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Unified Diff: src/x64/full-codegen-x64.cc

Issue 3431010: Clean up the insertion of nops (signalling non-inlined loads and... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 10 years, 3 months ago
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Index: src/x64/full-codegen-x64.cc
===================================================================
--- src/x64/full-codegen-x64.cc (revision 5467)
+++ src/x64/full-codegen-x64.cc (working copy)
@@ -625,10 +625,7 @@
__ pop(rdx);
Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // Absence of a test rax instruction following the call
- // indicates that none of the load was inlined.
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
}
}
}
@@ -941,8 +938,7 @@
RelocInfo::Mode mode = (typeof_state == INSIDE_TYPEOF)
? RelocInfo::CODE_TARGET
: RelocInfo::CODE_TARGET_CONTEXT;
- __ call(ic, mode);
- __ nop(); // Signal no inlined code.
+ EmitCallIC(ic, mode);
}
@@ -1019,7 +1015,7 @@
slow));
__ Move(rax, key_literal->handle());
Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
__ jmp(done);
}
}
@@ -1043,11 +1039,7 @@
__ Move(rcx, var->name());
__ movq(rax, CodeGenerator::GlobalObject());
Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
- __ Call(ic, RelocInfo::CODE_TARGET_CONTEXT);
- // A test rax instruction following the call is used by the IC to
- // indicate that the inobject property case was inlined. Ensure there
- // is no test rax instruction here.
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET_CONTEXT);
Apply(context, rax);
} else if (slot != NULL && slot->type() == Slot::LOOKUP) {
@@ -1110,10 +1102,7 @@
// Do a keyed property load.
Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // Notice: We must not have a "test rax, ..." instruction after the
- // call. It is treated specially by the LoadIC code.
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
Apply(context, rax);
}
}
@@ -1212,8 +1201,7 @@
__ Move(rcx, key->handle());
__ movq(rdx, Operand(rsp, 0));
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
break;
}
// Fall through.
@@ -1425,16 +1413,14 @@
Literal* key = prop->key()->AsLiteral();
__ Move(rcx, key->handle());
Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
- __ Call(ic, RelocInfo::CODE_TARGET);
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
}
void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) {
SetSourcePosition(prop->position());
Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
- __ Call(ic, RelocInfo::CODE_TARGET);
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
}
@@ -1553,8 +1539,7 @@
__ pop(rax); // Restore value.
__ Move(rcx, prop->key()->AsLiteral()->handle());
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- __ nop(); // Signal no inlined code.
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
break;
}
case KEYED_PROPERTY: {
@@ -1565,8 +1550,7 @@
__ pop(rdx);
__ pop(rax);
Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- __ nop(); // Signal no inlined code.
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
break;
}
}
@@ -1589,8 +1573,7 @@
__ Move(rcx, var->name());
__ movq(rdx, CodeGenerator::GlobalObject());
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
- __ Call(ic, RelocInfo::CODE_TARGET);
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
} else if (var->mode() != Variable::CONST || op == Token::INIT_CONST) {
// Perform the assignment for non-const variables and for initialization
@@ -1674,8 +1657,7 @@
__ pop(rdx);
}
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
- __ Call(ic, RelocInfo::CODE_TARGET);
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
// If the assignment ends an initialization block, revert to fast case.
if (expr->ends_initialization_block()) {
@@ -1713,10 +1695,7 @@
// Record source code position before IC call.
SetSourcePosition(expr->position());
Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize));
- __ Call(ic, RelocInfo::CODE_TARGET);
- // This nop signals to the IC that there is no inlined code at the call
- // site for it to patch.
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
// If the assignment ends an initialization block, revert to fast case.
if (expr->ends_initialization_block()) {
@@ -1765,7 +1744,7 @@
InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP;
Handle<Code> ic = CodeGenerator::ComputeCallInitialize(arg_count,
in_loop);
- __ Call(ic, mode);
+ EmitCallIC(ic, mode);
// Restore context register.
__ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
Apply(context_, rax);
@@ -1789,7 +1768,7 @@
InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP;
Handle<Code> ic = CodeGenerator::ComputeKeyedCallInitialize(arg_count,
in_loop);
- __ Call(ic, mode);
+ EmitCallIC(ic, mode);
// Restore context register.
__ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
Apply(context_, rax);
@@ -1924,11 +1903,7 @@
// Record source code position for IC call.
SetSourcePosition(prop->position());
Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // By emitting a nop we make sure that we do not have a "test rax,..."
- // instruction after the call as it is treated specially
- // by the LoadIC code.
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
// Pop receiver.
__ pop(rbx);
// Push result (function).
@@ -2841,7 +2816,7 @@
__ Move(rcx, expr->name());
InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP;
Handle<Code> ic = CodeGenerator::ComputeCallInitialize(arg_count, in_loop);
- __ call(ic, RelocInfo::CODE_TARGET);
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
// Restore context register.
__ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
} else {
@@ -3139,10 +3114,7 @@
__ Move(rcx, prop->key()->AsLiteral()->handle());
__ pop(rdx);
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // This nop signals to the IC that there is no inlined code at the call
- // site for it to patch.
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
if (expr->is_postfix()) {
if (context_ != Expression::kEffect) {
ApplyTOS(context_);
@@ -3156,10 +3128,7 @@
__ pop(rcx);
__ pop(rdx);
Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // This nop signals to the IC that there is no inlined code at the call
- // site for it to patch.
- __ nop();
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
if (expr->is_postfix()) {
if (context_ != Expression::kEffect) {
ApplyTOS(context_);
@@ -3182,8 +3151,7 @@
Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
// Use a regular load, not a contextual load, to avoid a reference
// error.
- __ Call(ic, RelocInfo::CODE_TARGET);
- __ nop(); // Signal no inlined code.
+ EmitCallIC(ic, RelocInfo::CODE_TARGET);
if (where == kStack) __ push(rax);
} else if (proxy != NULL &&
proxy->var()->slot() != NULL &&
@@ -3431,12 +3399,38 @@
}
-Register FullCodeGenerator::result_register() { return rax; }
+Register FullCodeGenerator::result_register() {
+ return rax;
+}
-Register FullCodeGenerator::context_register() { return rsi; }
+Register FullCodeGenerator::context_register() {
+ return rsi;
+}
+void FullCodeGenerator::EmitCallIC(Handle<Code> ic, RelocInfo::Mode mode) {
+ ASSERT(mode == RelocInfo::CODE_TARGET ||
+ mode == RelocInfo::CODE_TARGET_CONTEXT);
+ __ call(ic, mode);
+
+ // If we're calling a (keyed) load or store stub, we have to mark
+ // the call as containing no inlined code so we will not attempt to
+ // patch it.
+ switch (ic->kind()) {
+ case Code::LOAD_IC:
+ case Code::KEYED_LOAD_IC:
+ case Code::STORE_IC:
+ case Code::KEYED_STORE_IC:
+ __ nop(); // Signals no inlined code.
+ break;
+ default:
+ // Do nothing.
+ break;
+ }
+}
+
+
void FullCodeGenerator::StoreToFrameField(int frame_offset, Register value) {
ASSERT(IsAligned(frame_offset, kPointerSize));
__ movq(Operand(rbp, frame_offset), value);
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