Hi, I am working on 32bit Pmode for x32:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50797 It removes all LEAs, which convert 32bit address to 64bit, and uses 0x67 address prefix instead. I got 5% speed up in SPEC CPU 2K/2006. But assert in _Unwind_SetGRValue: gcc_assert (dwarf_reg_size_table[index] == sizeof (_Unwind_Context_Reg_Val)); failed on return column since init_return_column_size use Pmode, not word_mode. In this case, _Unwind_Context_Reg_Val is 64bit, but return column size is 32bit. This patch changes it to assert DWARF register size <= saved reg size. OK for trunk? Thanks. H.J. --- 2011-11-11 H.J. Lu <hongjiu...@intel.com> * unwind-dw2.c (_Unwind_SetGRValue): Assert DWARF register size <= saved reg size. diff --git a/libgcc/unwind-dw2.c b/libgcc/unwind-dw2.c index 475ad00..db1c757 100644 --- a/libgcc/unwind-dw2.c +++ b/libgcc/unwind-dw2.c @@ -294,7 +294,8 @@ _Unwind_SetGRValue (struct _Unwind_Context *context, int index, { index = DWARF_REG_TO_UNWIND_COLUMN (index); gcc_assert (index < (int) sizeof(dwarf_reg_size_table)); - gcc_assert (dwarf_reg_size_table[index] == sizeof (_Unwind_Context_Reg_Val)); + /* Return column size may be smaller than _Unwind_Context_Reg_Va. */ + gcc_assert (dwarf_reg_size_table[index] <= sizeof (_Unwind_Context_Reg_Val)); context->by_value[index] = 1; context->reg[index] = _Unwind_Get_Unwind_Context_Reg_Val (val);
