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author | Evan Cheng <evan.cheng@apple.com> | 2009-01-21 02:09:05 +0000 |
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committer | Evan Cheng <evan.cheng@apple.com> | 2009-01-21 02:09:05 +0000 |
commit | 201501995f3fc4ac74939fe82b55d9f8d1bad756 (patch) | |
tree | d49fe994bbb9b9f402161470edcbfb4af11edc5e /llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | |
parent | 287b4bc44ef5c39346e01efb8e763dca8dec1960 (diff) | |
download | bcm5719-llvm-201501995f3fc4ac74939fe82b55d9f8d1bad756.tar.gz bcm5719-llvm-201501995f3fc4ac74939fe82b55d9f8d1bad756.zip |
Favors generating "not" over "xor -1". For example.
unsigned test(unsigned a) {
return ~a;
}
llvm used to generate:
movl $4294967295, %eax
xorl 4(%esp), %eax
Now it generates:
movl 4(%esp), %eax
notl %eax
It's 3 bytes shorter.
llvm-svn: 62661
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp')
0 files changed, 0 insertions, 0 deletions