[PATCH 0/2] tcg: optimize across branches

[Richard Henderson]

In several cases, it's easy to optimize across a non-taken branch
simply by *not* flushing the relevant tables.  This is true both
for value propagation and register allocation.

This comes up in quite a number of cases with arm, most simply in
how conditional execution is implemented.  But it also came up in
discussion of how to implement low-overhead looping for v8.1m.


r~


Richard Henderson (2):
  tcg: Do not kill globals at conditional branches
  tcg/optimize: Flush data at labels not TCG_OPF_BB_END

 include/tcg/tcg-opc.h |  7 +++---
 include/tcg/tcg.h     |  4 +++-
 tcg/optimize.c        | 35 ++++++++++++++-------------
 tcg/tcg.c             | 55 +++++++++++++++++++++++++++++++++++++++++--
 4 files changed, 78 insertions(+), 23 deletions(-)

-- 
2.25.1