http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49257
--- Comment #2 from Uros Bizjak <ubizjak at gmail dot com> 2011-06-01 17:57:44 UTC --- The problem is in floatunsdidf2 expander that is currently disabled on x86_32 due to TARGET_KEEPS_VECTOR_ALIGNED_STACK. Without this expander, gcc generates unsigned DImode->XFmode conversion using floatdixf pattern with XFmode x87 registers. Since latest x86_32 ABI linux ABI mandates 16 byte alignment, we can perhaps: Index: config/i386/linux.h =================================================================== --- config/i386/linux.h (revision 174535) +++ config/i386/linux.h (working copy) @@ -24,3 +24,6 @@ #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2" #define MD_UNWIND_SUPPORT "config/i386/linux-unwind.h" + +#undef TARGET_KEEPS_VECTOR_ALIGNED_STACK +#define TARGET_KEEPS_VECTOR_ALIGNED_STACK 1
