https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71932
Bug ID: 71932
Summary: internal compiler error: in push_reload, at
reload.c:1360
Product: gcc
Version: 4.9.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: RichardFalk at comcast dot net
Target Milestone: ---
Created attachment 38934
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38934&action=edit
Pre-processed C file with the minimum amount of code to generate this bug.
The push_reload error is very sensitive to any changes to the source code. The
minimum subset to reproduce the error is attached.
The error with the attached pre-processed C file is as follows:
reload_bug.c: In function 'push_reload_error':
reload_bug.c:96:1: internal compiler error: in push_reload, at reload.c:1360
and is generated with the following minimum call where the -Os optimization is
required and is the only optimization setting that fails:
avr-gcc -Os -S reload_bug_pre.c
The details of the avr-gcc build are as follows:
Using built-in specs.
COLLECT_GCC=avr-gcc
COLLECT_LTO_WRAPPER=/usr/local/Cellar/avr-gcc/4.9.3/libexec/gcc/avr/4.9.3/lto-wrapper
Target: avr
Configured with: ../configure --target=avr
--prefix=/usr/local/Cellar/avr-gcc/4.9.3 --enable-languages=c,c++ --with-gnu-as
--with-gnu-ld --with-ld=/usr/local/opt/avr-binutils/bin/avr-ld
--with-as=/usr/local/opt/avr-binutils/bin/avr-as --disable-nls --disable-shared
--disable-threads --disable-libssp --disable-libstdcxx-pch --disable-libgomp
--with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr
--with-mpc=/usr/local/opt/libmpc --with-system-zlib
Thread model: single
gcc version 4.9.3 (GCC)
Note that the following construct seen (and required) in the file:
(__extension__({static const char __c[] = (""); &__c[0];}))
comes from the macro PSTR defined in the AVR header pgmspace.h
