When subtracting 0x1 from 0xE, the -0x1 is incorrectly parsed as a suffix. Subtracting 0x1 from other hex constants works fine.
$ cat bug.c int good = 0xD-0x1; int bad = 0xE-0x1; $ gcc -v -save-temps -c bug.c Using built-in specs. Target: i686-redhat-linux Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --enable-plugin --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre --enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic --with-arch=i686 --build=i686-redhat-linux Thread model: posix gcc version 4.4.2 20091027 (Red Hat 4.4.2-7) (GCC) COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-mtune=generic' '-march=i686' /usr/libexec/gcc/i686-redhat-linux/4.4.2/cc1 -E -quiet -v bug.c -mtune=generic -march=i686 -fpch-preprocess -o bug.i ignoring nonexistent directory "/usr/lib/gcc/i686-redhat-linux/4.4.2/include-fixed" ignoring nonexistent directory "/usr/lib/gcc/i686-redhat-linux/4.4.2/../../../../i686-redhat-linux/include" #include "..." search starts here: #include <...> search starts here: /usr/local/include /usr/lib/gcc/i686-redhat-linux/4.4.2/include /usr/include End of search list. COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-mtune=generic' '-march=i686' /usr/libexec/gcc/i686-redhat-linux/4.4.2/cc1 -fpreprocessed bug.i -quiet -dumpbase bug.c -mtune=generic -march=i686 -auxbase bug -version -o bug.s GNU C (GCC) version 4.4.2 20091027 (Red Hat 4.4.2-7) (i686-redhat-linux) compiled by GNU C version 4.4.2 20091027 (Red Hat 4.4.2-7), GMP version 4.3.1, MPFR version 2.4.1. GGC heuristics: --param ggc-min-expand=97 --param ggc-min-heapsize=127310 Compiler executable checksum: bba6b4235667b4e22536a25004e123c4 bug.c:2:11: error: invalid suffix "-0x1" on integer constant -- Summary: error: invalid suffix "-0x1" on integer constant when subtracting 0x1 from 0xE Product: gcc Version: 4.4.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: bradley at dunn dot org GCC build triplet: i686-redhat-linux GCC host triplet: i686-redhat-linux GCC target triplet: i686-redhat-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42421
