Attached sample (reduced from glibc cvs) caused gcc built from latest gcc-4_3-branch to ICE on arm. It worked ok with gcc 4.2.2. If I removed -frename-registers then the ICE would not happen.
Steps to reproduce Compile as follows arm-none-linux-gnueabi-gcc -c -O2 sample.c -frename-registers sample.c: In function foo: sample.c:10: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. /* sample.c */ int foo () { const unsigned char *inptr = 0; unsigned char *outptr = 0; unsigned int inval = (__extension__ ({ register unsigned int __bsx = (*(const unsigned int *) inptr); ((((__bsx) & 0xff000000u) >> 24) | (((__bsx) & 0x00ff0000u) >> 8) | (((__bsx) & 0x0000ff00u) << 8) | (((__bsx) & 0x000000ffu) << 24)); })); if (__builtin_expect (inval > 0x7fffffff, 0)) { *((unsigned int *) outptr) = inval; } return 0; } -- Summary: GCC ICE with -frename-registers Product: gcc Version: 4.3.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: raj dot khem at gmail dot com GCC build triplet: i686-linux GCC host triplet: i686-linux GCC target triplet: arm-none-linux-gnueabi http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36350
