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MIPS: Utility functions for pretenure call new.

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Port r19998 (6b07a42)

Original commit message:
These functions aren't yet called in the tree but will be in the next days. AssertUndefinedOrAllocationSite is to be used in several places where AllocationSite feedback is optional.

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/196423018

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20014 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
plind44@gmail.com 2014-03-17 18:27:44 +00:00
parent 037e981939
commit 9337a45ab3
2 changed files with 21 additions and 0 deletions
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17
src/mips/macro-assembler-mips.cc
View File

@ -4817,6 +4817,23 @@ void MacroAssembler::AssertName(Register object) {
}
void MacroAssembler::AssertUndefinedOrAllocationSite(Register object,
Register scratch) {
if (emit_debug_code()) {
Label done_checking;
AssertNotSmi(object);
LoadRoot(scratch, Heap::kUndefinedValueRootIndex);
Branch(&done_checking, eq, object, Operand(scratch));
push(object);
lw(object, FieldMemOperand(object, HeapObject::kMapOffset));
LoadRoot(scratch, Heap::kAllocationSiteMapRootIndex);
Assert(eq, kExpectedUndefinedOrCell, object, Operand(scratch));
pop(object);
bind(&done_checking);
}
}
void MacroAssembler::AssertIsRoot(Register reg, Heap::RootListIndex index) {
if (emit_debug_code()) {
ASSERT(!reg.is(at));

4
src/mips/macro-assembler-mips.h
View File

@ -1432,6 +1432,10 @@ const Operand& rt = Operand(zero_reg), BranchDelaySlot bd = PROTECT
// Abort execution if argument is not a name, enabled via --debug-code.
void AssertName(Register object);
// Abort execution if argument is not undefined or an AllocationSite, enabled
// via --debug-code.
void AssertUndefinedOrAllocationSite(Register object, Register scratch);
// Abort execution if reg is not the root value with the given index,
// enabled via --debug-code.
void AssertIsRoot(Register reg, Heap::RootListIndex index);