Examples with SsaInsn com.android.dx.ssa.SsaInsn used on opensource projects

Example 16 with SsaInsn

use of com.android.dx.ssa.SsaInsn in project J2ME-Loader by nikita36078.

the class LivenessAnalyzer method coInterferePhis.

/**
 * Ensures that all the phi result registers for all the phis in the
 * same basic block interfere with each other. This is needed since
 * the dead code remover has allowed through "dead-end phis" whose
 * results are not used except as local assignments. Without this step,
 * a the result of a dead-end phi might be assigned the same register
 * as the result of another phi, and the phi removal move scheduler may
 * generate moves that over-write the live result.
 *
 * @param ssaMeth {@code non-null;} method to pricess
 * @param interference {@code non-null;} interference graph
 */
private static void coInterferePhis(SsaMethod ssaMeth, InterferenceGraph interference) {
    for (SsaBasicBlock b : ssaMeth.getBlocks()) {
        List<SsaInsn> phis = b.getPhiInsns();
        int szPhis = phis.size();
        for (int i = 0; i < szPhis; i++) {
            for (int j = 0; j < szPhis; j++) {
                if (i == j) {
                    continue;
                }
                interference.add(phis.get(i).getResult().getReg(), phis.get(j).getResult().getReg());
            }
        }
    }
}

Example 17 with SsaInsn

use of com.android.dx.ssa.SsaInsn in project J2ME-Loader by nikita36078.

the class SsaToRop method verifyValidExitPredecessor.

/**
 * Validates that a basic block is a valid end predecessor. It must
 * end in a RETURN or a THROW. Throws a runtime exception on error.
 *
 * @param b {@code non-null;} block to validate
 * @throws RuntimeException on error
 */
private void verifyValidExitPredecessor(SsaBasicBlock b) {
    ArrayList<SsaInsn> insns = b.getInsns();
    SsaInsn lastInsn = insns.get(insns.size() - 1);
    Rop opcode = lastInsn.getOpcode();
    if (opcode.getBranchingness() != Rop.BRANCH_RETURN && opcode != Rops.THROW) {
        throw new RuntimeException("Exit predecessor must end" + " in valid exit statement.");
    }
}