https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86027
Bug ID: 86027
Summary: string literals get corrupted with -O3 and gas on
solaris i386
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: subscribe at teskor dot de
Target Milestone: ---
Created attachment 44224
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44224&action=edit
source reproducing the error
GCC is Configured with: ../configure --with-cpu-32=i386 --prefix=/opt/gcc-7.3.0
--with-gnu-as --with-as=/opt/csw/bin/gas --without-gnu-ld
--with-ld=/usr/ccs/bin/ld --with-gmp=/opt/csw --with-mpfr=/opt/csw
--with-mpc=/opt/csw ABI=32
Target is: i386-pc-solaris2.10
In this configuration, the output of the test program is corrupted. What should
be 12\n3 becomes some random 3 bytes (depending heavily on the code layout,
they changed everytime I deleted some unneeded functions from the code).
If using -O0, the problems goes away.
Only strings literals which are used more than once in the code get garbled.
(the "\n" and and "12", while the "3" stays correct).
Reconfiguring the compiler to use the native assembler in /usr/ccs/bin/as fixed
the problem, but unfortunately there the -pipe option ceases to work (but
that's a different issue).
It seems to, that when configured with --with-gnu-as on solaris, the attributes
of the section containing the strings are wrongly generated in the assembler
code, but that's just a guess.
