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Make branch instructions traceable using a new primitive guard_boolean_is_true.

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This commit is contained in:
Andreas Gal 2008-05-26 23:33:23 -07:00
parent 32908d0e2f
commit e0a5de51b2
1 changed files with 22 additions and 18 deletions
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40
js/src/jsinterp.cpp
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@ -2754,6 +2754,10 @@ static inline void prim_ursh(uint32& a, jsint& b, uint32& r) {
r = a >> (b & 31);
}
static inline bool guard_boolean_is_true(JSBool& cond) {
return cond;
}
/*
* The monitor observers backward branches and triggers the trace recorder. This
* is the only part of the tracing system that is always enabled and thus incurs
@ -3376,80 +3380,80 @@ js_Interpret(JSContext *cx)
CHECK_BRANCH(len);
END_VARLEN_CASE
BEGIN_CASE(JSOP_IFEQ)
TRACE_CASE(JSOP_IFEQ)
POP_BOOLEAN(cx, rval, cond);
if (cond == JS_FALSE) {
if (!guard_boolean_is_true(cond)) {
len = GET_JUMP_OFFSET(regs.pc);
CHECK_BRANCH(len);
DO_NEXT_OP(len);
}
END_CASE(JSOP_IFEQ)
BEGIN_CASE(JSOP_IFNE)
TRACE_CASE(JSOP_IFNE)
POP_BOOLEAN(cx, rval, cond);
if (cond != JS_FALSE) {
if (guard_boolean_is_true(cond)) {
len = GET_JUMP_OFFSET(regs.pc);
CHECK_BRANCH(len);
DO_NEXT_OP(len);
}
END_CASE(JSOP_IFNE)
BEGIN_CASE(JSOP_OR)
TRACE_CASE(JSOP_OR)
POP_BOOLEAN(cx, rval, cond);
if (cond == JS_TRUE) {
if (guard_boolean_is_true(cond)) {
len = GET_JUMP_OFFSET(regs.pc);
PUSH_STACK(rval);
DO_NEXT_OP(len);
}
END_CASE(JSOP_OR)
BEGIN_CASE(JSOP_AND)
TRACE_CASE(JSOP_AND)
POP_BOOLEAN(cx, rval, cond);
if (cond == JS_FALSE) {
if (!guard_boolean_is_true(cond)) {
len = GET_JUMP_OFFSET(regs.pc);
PUSH_STACK(rval);
DO_NEXT_OP(len);
}
END_CASE(JSOP_AND)
BEGIN_CASE(JSOP_DEFAULTX)
TRACE_CASE(JSOP_DEFAULTX)
ADJUST_STACK(-1);
/* FALL THROUGH */
BEGIN_CASE(JSOP_GOTOX)
TRACE_CASE(JSOP_GOTOX)
len = GET_JUMPX_OFFSET(regs.pc);
CHECK_BRANCH(len);
END_VARLEN_CASE
BEGIN_CASE(JSOP_IFEQX)
TRACE_CASE(JSOP_IFEQX)
POP_BOOLEAN(cx, rval, cond);
if (cond == JS_FALSE) {
if (!guard_boolean_is_true(cond)) {
len = GET_JUMPX_OFFSET(regs.pc);
CHECK_BRANCH(len);
DO_NEXT_OP(len);
}
END_CASE(JSOP_IFEQX)
BEGIN_CASE(JSOP_IFNEX)
TRACE_CASE(JSOP_IFNEX)
POP_BOOLEAN(cx, rval, cond);
if (cond != JS_FALSE) {
if (guard_boolean_is_true(cond)) {
len = GET_JUMPX_OFFSET(regs.pc);
CHECK_BRANCH(len);
DO_NEXT_OP(len);
}
END_CASE(JSOP_IFNEX)
BEGIN_CASE(JSOP_ORX)
TRACE_CASE(JSOP_ORX)
POP_BOOLEAN(cx, rval, cond);
if (cond == JS_TRUE) {
if (guard_boolean_is_true(cond)) {
len = GET_JUMPX_OFFSET(regs.pc);
PUSH_STACK(rval);
DO_NEXT_OP(len);
}
END_CASE(JSOP_ORX)
BEGIN_CASE(JSOP_ANDX)
TRACE_CASE(JSOP_ANDX)
POP_BOOLEAN(cx, rval, cond);
if (cond == JS_FALSE) {
if (!guard_boolean_is_true(cond)) {
len = GET_JUMPX_OFFSET(regs.pc);
PUSH_STACK(rval);
DO_NEXT_OP(len);