[LLVMdev] question about the alignment of the .text section

[Romanova, Katya]

Is there a reason why the alignment of the .text section should be 4 when we are optimizing for size (-Os or -Oz)? Note that when are optimizing for size, the symbols inside .text section don't have any alignment constraints. Alignment=4 for .text  with the unaligned symbols inside this section prevent our linker from de-duplicating functions. Could the alignment of the .text section be changed to 1? Could it cause any potential problems (correctness/performance)?

clang -c -Os test.cpp -o test.o
readelf -S test.o
  [ 1] .text             PROGBITS         0000000000000000  00000040
       0000000000000052  0000000000000000  AX       0     0     4

Thanks!
Katya.


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