C++ (Cpp) MInstruction::toTest Examples

Example #1

MTest *
MBasicBlock::immediateDominatorBranch(BranchDirection *pdirection)
{
    *pdirection = FALSE_BRANCH;

    if (numPredecessors() != 1)
        return NULL;

    MBasicBlock *dom = immediateDominator();
    if (dom != getPredecessor(0))
        return NULL;

    // Look for a trailing MTest branching to this block.
    MInstruction *ins = dom->lastIns();
    if (ins->isTest()) {
        MTest *test = ins->toTest();

        JS_ASSERT(test->ifTrue() == this || test->ifFalse() == this);
        if (test->ifTrue() == this && test->ifFalse() == this)
            return NULL;

        *pdirection = (test->ifTrue() == this) ? TRUE_BRANCH : FALSE_BRANCH;
        return test;
    }

    return NULL;
}