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author | Pete Cooper <peter_cooper@apple.com> | 2016-05-27 03:42:17 +0000 |
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committer | Pete Cooper <peter_cooper@apple.com> | 2016-05-27 03:42:17 +0000 |
commit | 18e9102a852193adda32906270fc5fe0bfe73fcb (patch) | |
tree | 4875f01fdc8c340a07a955c1dff330cf49e060c7 /clang/lib/Frontend/CompilerInvocation.cpp | |
parent | 8c11fce7077a484530c7dfda2ddbe82417ae375c (diff) | |
download | bcm5719-llvm-18e9102a852193adda32906270fc5fe0bfe73fcb.tar.gz bcm5719-llvm-18e9102a852193adda32906270fc5fe0bfe73fcb.zip |
Don't allocate unnecessarily in APInt::operator[+-]. NFC.
APInt::operator+(uint64_t) just forwarded to operator+(const APInt&).
Constructing the APInt for the RHS takes an allocation which isn't
required. Also, for APInt's in the slow path, operator+ would
call add() internally which iterates over both arrays of values. Instead
we can use add_1 and sub_1 which only iterate while there is something to do.
Using the memory for 'opt -O2 verify-uselistorder.lto.opt.bc -o opt.bc'
(see r236629 for details), this reduces the number of allocations from
23.9M to 22.7M.
llvm-svn: 270959
Diffstat (limited to 'clang/lib/Frontend/CompilerInvocation.cpp')
0 files changed, 0 insertions, 0 deletions