LLVM doesn't store data initialized with zero in BSS

[EdSchouten]

Bugzilla Link	3722
Resolution	FIXED
Resolved on	Mar 04, 2009 13:17
Version	unspecified
OS	FreeBSD
Attachments	Testcase
CC	@asl,@pwo

Extended Description

The attached application is only 6 KB when compiled with GCC, but 104 KB when compiled with Clang. This is because the array at the top is initialized with zeroes. GCC puts it in BSS, while Clang does not.

[lattner]

This is most likely a x86 backend bug or asmprinter bug. Can you please include the .bc file that you get for that (clang -emit-llvm) as well as the .s file you get from GCC and clang? Thanks!

[EdSchouten]

ccc -emit-llvm

[EdSchouten]

ccc -S

[EdSchouten]

gcc -S

[EdSchouten]

Maybe it's .section .bss that's missing?

[llvmbot]

Driver bug; fixed here: http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20090302/013434.html