Port 9846f386

Original commit message:
    The literal index is being pushed onto the stack while evaluating
    the non-constant subexpressions, but never used in fullcodegen (and
    hence not used in the optimizing compilers).

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1468273005

Cr-Commit-Position: refs/heads/master@{#32229}