[PATCH] Make global aliases have symbol size equal to their type
John Brawn
john.brawn at arm.com
Tue Jun 30 07:31:32 PDT 2015
In http://reviews.llvm.org/D10837#197109, @rafael wrote:
> Why do you need to print the .size in the assembly? The assembler
> itself (MC/gas) propagates the size.
Yes, but it propagates it from the aliasee. In global-merge-2.ll, for example, if you generate object output then inspect the symbol table it says
0000000000000000 g .bss 0000000c x
0000000000000004 g .bss 0000000c y
0000000000000008 g .bss 0000000c z
which says that x is 12-bytes in size starting at offset 8 inside the .bss section. As x was originally (before GlobalMerge) a 4-byte variable this is slightly surprising, plus the .bss section is 12 bytes long so z apparently extends past the end of the .bss section.
REPOSITORY
rL LLVM
http://reviews.llvm.org/D10837
EMAIL PREFERENCES
http://reviews.llvm.org/settings/panel/emailpreferences/
More information about the llvm-commits
mailing list