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I compile a C++ program, using for example the following.

clang++ -O4 -emit-llvm file1.cpp -c -o file1.bc 
clang++ -O4 -emit-llvm file2.cpp -c -o file2.bc 

llvm-link file1.bc file2.bc

How can I perform link time optimization here?

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1 に答える 1

10

使用opt:

clang++ -O4 -emit-llvm file1.cpp -c -o file1.bc 
clang++ -O4 -emit-llvm file2.cpp -c -o file2.bc 
llvm-link file1.bc file2.bc -o all.bc
opt -std-compile-opts -std-link-opts -O3 all.bc -o optimized.bc
于 2012-08-03T01:08:55.733 に答える