diff options
| author | Evan Cheng <evan.cheng@apple.com> | 2008-11-27 00:49:46 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-11-27 00:49:46 +0000 |
| commit | 5a424559e5509e61df7b1d1e124178f8073796dd (patch) | |
| tree | eea845867e8c466b91a3bf184a9c9c1df7049e2e /lib/CodeGen/LoopAligner.cpp | |
| parent | e7e5da3e66cf237a697dfb94bcbd0c99668a13e2 (diff) | |
| download | external_llvm-5a424559e5509e61df7b1d1e124178f8073796dd.zip external_llvm-5a424559e5509e61df7b1d1e124178f8073796dd.tar.gz external_llvm-5a424559e5509e61df7b1d1e124178f8073796dd.tar.bz2 | |
On x86 favors folding short immediate into some arithmetic operations (e.g. add, and, xor, etc.) because materializing an immediate in a register is expensive in turns of code size.
e.g.
movl 4(%esp), %eax
addl $4, %eax
is 2 bytes shorter than
movl $4, %eax
addl 4(%esp), %eax
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60139 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LoopAligner.cpp')
0 files changed, 0 insertions, 0 deletions