https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119312
Bug ID: 119312
Summary: Constant array not allocated in read-only segment
Product: gcc
Version: 14.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: bruno at clisp dot org
Target Milestone: ---
Created attachment 60779
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60779&action=edit
test case foo.c
When constant data is allocated in a read-only segment, it is more efficient
than in the .data segment (namely, the OS does not need to copy such a memory
page to the swap when memory is tight).
When compiling this program, although the array 'html5' contains only constant
data (note that the struct has no holes and has alignment 1), gcc puts it in
the .data segment.
How to reproduce:
$ gcc -O2 -c foo.c
$ size foo.o
text data bss dec hex filename
270 230 0 500 1f4 foo.o
Only when I add an additional 'const' to the 'html5' array, does gcc put it
into the .rodata or .text segment.
