https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127482
Bug ID: 127482
Summary: [avr] wrong code for IPA + -mcall-prologues + varargs
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: gjl at gcc dot gnu.org
Target Milestone: ---
Created attachment 65631
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65631&action=edit
bug.c : C test case
This test case fails when compiled with
$ avr-gcc -mmcu=atmega128 -Os -o bug.elf -mcall-prologues bug.c
Target: avr
Configured with: .../configure --target=avr --disable-nls --with-dwarf2
--with-gnu-as --with-gnu-ld --with-long-double=64 --enable-languages=c,c++
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 17.0.0 20260912 (experimental) (GCC)
The bug goes away when
* error() is attribute noipa, or
* error() doesn't terminate with exit(0), or
* Compiled without -mcall-prologues.
