tree 0f89b799e967d8118e51dfc33a1d9c47b60f8ea6
parent 8835576bd0dce5c2076478d6688762d267babf35
author Jim Stichnoth <stichnot@chromium.org> 1414861818 -0700
committer Jim Stichnoth <stichnot@chromium.org> 1414861818 -0700

Subzero: Decorate the text asm output with register availability info.

The -asm-verbose flag adds comments to the text asm output about register availability.  Specifically, it prints the registers in use at the beginning and end of each block, and it prints which registers' live ranges end at each instruction.

This is extremely helpful when studying the output to find opportunities to improve the code quality.

BUG= none
R=jvoung@chromium.org

Review URL: https://codereview.chromium.org/682983004