Observe with [gcc-4_3-branch revision 142454], --target=cris-axis-elf with -O2 and the soon attached testcase (from glibc sysdeps/posix/spawni.c and the CRIS glibc port, to be re-submitted) when assembling:
spawni.s: Assembler messages: spawni.s:172: Error: gcc bug: $r4,$r10 misallocated1, must be $r9,$r10 This is due to gcc bug-asserts in the asm syscalls (which were put there after an earlier bug), the generated code looking like: ... move.d $r4,$r9 #APP ;# 175 "../sysdeps/posix/spawni.c" 1 .ifnc $r4-$r10,$r9-$r10 .error "gcc bug: $r4,$r10 misallocated1, must be $r9,$r10" .endif Note that $r9 and $r4 hold the same value, hence the "almost" in the subject. Something or other is not updated for the asm, which is certainly bad enough. -- Summary: asm-declared register misnamed when feeding asm, "almost" misallocated. Product: gcc Version: 4.3.3 Status: UNCONFIRMED Severity: normal Priority: P3 Component: rtl-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: hp at gcc dot gnu dot org GCC host triplet: x86_64-unknown-linux-gnu GCC target triplet: cris-*-* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38412