Il 03/09/2013 08:27, Aurelien Jarno ha scritto: > This patchset first fixes known-zero bits optimization so that it is > actually used, and does some further optimizations for 32-bit ops and > unsigned loads. > > Aurelien Jarno (4): > tcg/optimize: fix know-zero bits optimization > tcg/optimize: fix known-zero bits for right shift ops > tcg/optimize: improve known-zero bits for 32-bit ops > tcg/optimize: add known-zero bits compute for load ops > > tcg/optimize.c | 48 +++++++++++++++++++++++++++++++++++++++++++----- > 1 file changed, 43 insertions(+), 5 deletions(-) >
Commit message 1 is a bit misleading, because the optimization still works for quite a few cases involving constant and copy propagation. However, I had the same patch in my queue, so I can't deny that there is a problem. :) Two questions: 1) should patch 2 be CCed to qemu-stable? 2) should patches 1 and 2 be inverted to avoid triggering bugs? Paolo
