| commit | b4cb76e6208cf6b5bb39404c6d44a6514eb6842a | |
| author | Richard Henderson <richard.henderson@linaro.org> | |
| Thu, 8 Oct 2020 20:21:43 +0000 (8 15:21 -0500) | ||
| committer | Richard Henderson <richard.henderson@linaro.org> | |
| Tue, 27 Oct 2020 16:48:07 +0000 (27 09:48 -0700) | ||
| tree | 829655e4134d425e6c12ef42f2350f184a930635 | treesnapshot (tar.gz zip) |
| parent | 4a74626970ab4ea475263d155b10fb75c9af0b33 | commitdiff |
tcg: Do not kill globals at conditional branches
We can easily register allocate the entire extended basic block
(in this case, the set of blocks connected by fallthru), simply
by not discarding the register state at the branch.
This does not help blocks starting with a label, as they are
reached via a taken branch, and that would require saving the
complete register state at the branch.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We can easily register allocate the entire extended basic block
(in this case, the set of blocks connected by fallthru), simply
by not discarding the register state at the branch.
This does not help blocks starting with a label, as they are
reached via a taken branch, and that would require saving the
complete register state at the branch.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
| include/tcg/tcg-opc.h | diffblobblamehistory | |
| include/tcg/tcg.h | diffblobblamehistory | |
| tcg/tcg.c | diffblobblamehistory |