diff options
| author | Duncan Sands <baldrick@free.fr> | 2011-01-14 15:26:10 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2011-01-14 15:26:10 +0000 |
| commit | d6f1a9584d72d11e652adc34fc9f5d911eee8e8c (patch) | |
| tree | f859e4dab89d939437f97f2c62d9679ab1c3a5fc /llvm/test/CodeGen/Generic/add-with-overflow.ll | |
| parent | 571fd9a60652c793c8bdcd7163cd8ee207dc2a84 (diff) | |
| download | bcm5719-llvm-d6f1a9584d72d11e652adc34fc9f5d911eee8e8c.tar.gz bcm5719-llvm-d6f1a9584d72d11e652adc34fc9f5d911eee8e8c.zip | |
Turn X-(X-Y) into Y. According to my auto-simplifier this is the most common
simplification present in fully optimized code (I think instcombine fails to
transform some of these when "X-Y" has more than one use). Fires here and
there all over the test-suite, for example it eliminates 8 subtractions in
the final IR for 445.gobmk, 2 subs in 447.dealII, 2 in paq8p etc.
llvm-svn: 123442
Diffstat (limited to 'llvm/test/CodeGen/Generic/add-with-overflow.ll')
0 files changed, 0 insertions, 0 deletions
