https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66930
Bug ID: 66930
Summary: [5 Regression]: gengtype.c is miscompiled during
stage2
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: glaubitz at physik dot fu-berlin.de
CC: doko at gcc dot gnu.org, kkojima at gcc dot gnu.org,
olegendo at gcc dot gnu.org
Target Milestone: ---
Target: sh*-*-*
Hello!
As previously discussed in private mail, I am now filing a bug report for the
regression in gcc-5 that was introduced somewhere between r222550 and r225710
which leads to the miscompilation of gcc/gengtype.c when building a native
compiler on SH [1]:
/«PKGBUILDDIR»/build/./prev-gcc/xg++ -B/«PKGBUILDDIR»/build/./prev-gcc/
-B/usr/sh4-linux-gnu/bin/ -nostdinc++
-B/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/src/.libs
-B/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/include/sh4-linux-gnu
-I/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/include
-I/«PKGBUILDDIR»/src/libstdc++-v3/libsupc++
-L/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/src/.libs
-L/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/libsupc++/.libs -c
-DIN_GCC_FRONTEND -g -O1 -gtoggle -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-I. -Ic -I../../src/gcc -I../../src/gcc/c -I../../src/gcc/../include
-I../../src/gcc/../libcpp/include -I../../src/gcc/../libdecnumber
-I../../src/gcc/../libdecnumber/dpd -I../libdecnumber
-I../../src/gcc/../libbacktrace -o c/c-objc-common.o -MT c/c-objc-common.o
-MMD -MP -MF c/.deps/c-objc-common.TPo ../../src/gcc/c/c-objc-common.c
/«PKGBUILDDIR»/build/./prev-gcc/xg++ -B/«PKGBUILDDIR»/build/./prev-gcc/
-B/usr/sh4-linux-gnu/bin/ -nostdinc++
-B/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/src/.libs
-B/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/include/sh4-linux-gnu
-I/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/include
-I/«PKGBUILDDIR»/src/libstdc++-v3/libsupc++
-L/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/src/.libs
-L/«PKGBUILDDIR»/build/prev-sh4-linux-gnu/libstdc++-v3/libsupc++/.libs -c
-DIN_GCC_FRONTEND -g -O1 -gtoggle -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-I. -Ic -I../../src/gcc -I../../src/gcc/c -I../../src/gcc/../include
-I../../src/gcc/../libcpp/include -I../../src/gcc/../libdecnumber
-I../../src/gcc/../libdecnumber/dpd -I../libdecnumber
-I../../src/gcc/../libbacktrace -o c/c-parser.o -MT c/c-parser.o -MMD -MP -MF
c/.deps/c-parser.TPo ../../src/gcc/c/c-parser.c
In file included from ../../src/gcc/c/c-parser.c:15558:0:
./gt-c-c-parser.h: In function 'void gt_ggc_mx_c_parser(void*)':
./gt-c-c-parser.h:41:7: error: break statement not within loop or switch
break;
^
./gt-c-c-parser.h:42:9: error: break statement not within loop or switch
break;
^
(...)
I am currently trying to pinpoint in which SVN snapshot the issue was
introduced since previous snapshots did not suffer from this bug [2]. To make
sure it's not an issue with the host compiler, I am currently doing testbuilds
on my SH7785LCR board of various SVN snapshots to gather more build logs which
should hopefully help to identify the change responsible for the regression.
These logs are collected in [3].
Cheers,
Adrian
> [1]
> http://buildd.debian-ports.org/status/fetch.php?pkg=gcc-5&arch=sh4&ver=5.1.1-2&stamp=1430520056
> [2]
> http://buildd.debian-ports.org/status/fetch.php?pkg=gcc-5&arch=sh4&ver=5.1.1-14&stamp=1436979741
> [3] https://people.debian.org/~glaubitz/sh4-gcc-5-tests/
