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Bug 901273 - IonMonkey: Reduce the size of IC calls on x86/x64 by two bytes per call by putting ICEntry's firstStub_ and ICStub's stubCode_ at beginnings of their respective classes, so that they don't need non-zero displacements. r=kvijayan

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This commit is contained in:
Dan Gohman 2013-08-06 10:18:41 -07:00
parent 095c30f22a
commit 855cce6fed
1 changed files with 21 additions and 21 deletions
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42
js/src/ion/BaselineIC.h
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@ -200,6 +200,9 @@ class ICFallbackStub;
class ICEntry
{
private:
// A pointer to the baseline IC stub for this instruction.
ICStub *firstStub_;
// Offset from the start of the JIT code where the IC
// load and call instructions are.
uint32_t returnOffset_;
@ -210,12 +213,9 @@ class ICEntry
// Whether this IC is for a bytecode op.
uint32_t isForOp_ : 1;
// A pointer to the baseline IC stub for this instruction.
ICStub *firstStub_;
public:
ICEntry(uint32_t pcOffset, bool isForOp)
: returnOffset_(), pcOffset_(pcOffset), isForOp_(isForOp), firstStub_(NULL)
: firstStub_(NULL), returnOffset_(), pcOffset_(pcOffset), isForOp_(isForOp)
{}
CodeOffsetLabel returnOffset() const {
@ -561,15 +561,6 @@ class ICStub
void trace(JSTracer *trc);
protected:
// The kind of the stub.
// High bit is 'isFallback' flag.
// Second high bit is 'isMonitored' flag.
Trait trait_ : 3;
Kind kind_ : 13;
// A 16-bit field usable by subtypes of ICStub for subtype-specific small-info
uint16_t extra_;
// The raw jitcode to call for this stub.
uint8_t *stubCode_;
@ -577,22 +568,31 @@ class ICStub
// either be a fallback or inert IC stub.
ICStub *next_;
// A 16-bit field usable by subtypes of ICStub for subtype-specific small-info
uint16_t extra_;
// The kind of the stub.
// High bit is 'isFallback' flag.
// Second high bit is 'isMonitored' flag.
Trait trait_ : 3;
Kind kind_ : 13;
inline ICStub(Kind kind, IonCode *stubCode)
: trait_(Regular),
kind_(kind),
: stubCode_(stubCode->raw()),
next_(NULL),
extra_(0),
stubCode_(stubCode->raw()),
next_(NULL)
trait_(Regular),
kind_(kind)
{
JS_ASSERT(stubCode != NULL);
}
inline ICStub(Kind kind, Trait trait, IonCode *stubCode)
: trait_(trait),
kind_(kind),
: stubCode_(stubCode->raw()),
next_(NULL),
extra_(0),
stubCode_(stubCode->raw()),
next_(NULL)
trait_(trait),
kind_(kind)
{
JS_ASSERT(stubCode != NULL);
}