[Qemu-devel] [PATCH 0/8] Improve TCG optimizer

[Aurelien Jarno]

This patch series improves the TCG optimizer, based on patterns found
while executing various guest. The brcond ad setcond constant folding
are useful especially useful when they are used to avoid some argument
values (e.g. division by 0), and thus can be optimized when this argument
is a constant.

This bring around 0.5% improvement on openssl like benchmarks.

Aurelien Jarno (8):
  tcg: improve profiler
  tcg/optimize: split expression simplification
  tcg/optimize: simplify or/xor r, a, 0 cases
  tcg/optimize: simplify and r, a, 0 cases
  tcg/optimize: simplify shift/rot r, 0, a => movi r, 0 cases
  tcg/optimize: swap brcond/setcond arguments when possible
  tcg/optimize: add constant folding for setcond
  tcg/optimize: add constant folding for brcond

 tcg/optimize.c |  161 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 tcg/tcg.c      |   18 ++++---
 tcg/tcg.h      |    2 +-
 3 files changed, 170 insertions(+), 11 deletions(-)

-- 
1.7.10.4