diff options
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/gcc/function.c b/gcc/function.c index 4cff6bb..cd39757 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -68,6 +68,10 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT #endif +#ifndef STARTING_FRAME_PHASE +#define STARTING_FRAME_PHASE 0 +#endif + /* Some systems use __main in a way incompatible with its use in gcc, in these cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to give the same symbol without quotes for an alternative entry point. You @@ -567,9 +571,9 @@ assign_stack_local_1 (mode, size, align, function) like. So we instead assume that ALIGNMENT is a power of two and use logical operations which are unambiguous. */ #ifdef FRAME_GROWS_DOWNWARD - function->x_frame_offset = FLOOR_ROUND (function->x_frame_offset, alignment); + function->x_frame_offset = FLOOR_ROUND (function->x_frame_offset - STARTING_FRAME_PHASE, alignment) + STARTING_FRAME_PHASE; #else - function->x_frame_offset = CEIL_ROUND (function->x_frame_offset, alignment); + function->x_frame_offset = CEIL_ROUND (function->x_frame_offset - STARTING_FRAME_PHASE, alignment) + STARTING_FRAME_PHASE; #endif /* On a big-endian machine, if we are allocating more space than we will use, @@ -3477,6 +3481,21 @@ instantiate_virtual_regs (fndecl, insns) rtx insn; unsigned int i; + if (STARTING_FRAME_PHASE > 0) + { + /* Make sure the frame offset and phase displacement are aligned as + advertised. + + Only do the sanity check if we have a STARTING_FRAME_PHASE, + else we might trigger this abort on ports who claim to have + STARTING_FRAME_OFFSET aligned properly, but don't. I suppose + we could enable this and fix those ports. */ + + if ((STARTING_FRAME_OFFSET + STARTING_FRAME_PHASE) + % (STACK_BOUNDARY / BITS_PER_UNIT)) + abort (); + } + /* Compute the offsets to use for this function. */ in_arg_offset = FIRST_PARM_OFFSET (fndecl); var_offset = STARTING_FRAME_OFFSET; |