diff options
Diffstat (limited to 'gcc/explow.c')
| -rw-r--r-- | gcc/explow.c | 36 |
1 files changed, 2 insertions, 34 deletions
diff --git a/gcc/explow.c b/gcc/explow.c index fe50787..7387dad 100644 --- a/gcc/explow.c +++ b/gcc/explow.c @@ -1,6 +1,6 @@ /* Subroutines for manipulating rtx's in semantically interesting ways. - Copyright (C) 1987, 1991, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 + Copyright (C) 1987, 1991, 1994, 1995, 1996, 1997, 1998, 1999, 2000, + 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. This file is part of GCC. @@ -1249,38 +1249,6 @@ allocate_dynamic_stack_space (rtx size, unsigned size_align, size_align = extra_align; } -#ifdef SETJMP_VIA_SAVE_AREA - /* If setjmp restores regs from a save area in the stack frame, - avoid clobbering the reg save area. Note that the offset of - virtual_incoming_args_rtx includes the preallocated stack args space. - It would be no problem to clobber that, but it's on the wrong side - of the old save area. - - What used to happen is that, since we did not know for sure - whether setjmp() was invoked until after RTL generation, we - would use reg notes to store the "optimized" size and fix things - up later. These days we know this information before we ever - start building RTL so the reg notes are unnecessary. */ - if (cfun->calls_setjmp) - { - rtx dynamic_offset - = expand_binop (Pmode, sub_optab, virtual_stack_dynamic_rtx, - stack_pointer_rtx, NULL_RTX, 1, OPTAB_LIB_WIDEN); - - size = expand_binop (Pmode, add_optab, size, dynamic_offset, - NULL_RTX, 1, OPTAB_LIB_WIDEN); - - /* The above dynamic offset cannot be computed statically at this - point, but it will be possible to do so after RTL expansion is - done. Record how many times we will need to add it. */ - if (flag_stack_usage_info) - current_function_dynamic_alloc_count++; - - /* ??? Can we infer a minimum of STACK_BOUNDARY here? */ - size_align = BITS_PER_UNIT; - } -#endif /* SETJMP_VIA_SAVE_AREA */ - /* Round the size to a multiple of the required stack alignment. Since the stack if presumed to be rounded before this allocation, this will maintain the required alignment. |