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author | Michael Forney <mforney@mforney.org> | 2019-07-02 20:32:09 -0700 |
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committer | Quentin Carbonneaux <quentin@c9x.me> | 2021-11-10 23:08:53 +0100 |
commit | 6838496e5c990339755577eb16b949fe2f47790e (patch) | |
tree | 91e13641873c6133b0540916ea1fd9f1fd5ee9ad /test/mem2.ssa | |
parent | ae8803cbe655f64a2ef1739c8dfc5c12af99bdfb (diff) | |
download | roux-6838496e5c990339755577eb16b949fe2f47790e.tar.gz |
fold: Don't fold invalid addition/subtraction rather than failing
This may happen in a branch QBE doesn't realize is unreachable, for example (simplified from real code found in ncurses) data $str = { b "abcdef", b 0 } function l $f(w %x) { @start %.1 =w ceqw %x, 0 jnz %.1, @logic_join, @logic_right @logic_right %p =l call $strchr(l $str, w %x) %.2 =w ceql %p, 0 @logic_join %.3 =w phi @start %.1, @logic_right %.2 jnz %.3, @fail, @return @fail ret 0 @return %.4 =l sub %p, $str ret %.4 }
Diffstat (limited to 'test/mem2.ssa')
0 files changed, 0 insertions, 0 deletions