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author | Walter Lee <walt@tilera.com> | 2014-01-25 20:26:31 +0000 |
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committer | Walter Lee <walt@gcc.gnu.org> | 2014-01-25 20:26:31 +0000 |
commit | 905c20c1239ab74388b3c9017356e7509d7cd845 (patch) | |
tree | 017057535d21524b879bc55c3a38370afbce581e /gcc/config/tilegx | |
parent | 8e90a6255fdf3cb39dbd2e80fc8e7c091834b68b (diff) | |
download | gcc-905c20c1239ab74388b3c9017356e7509d7cd845.zip gcc-905c20c1239ab74388b3c9017356e7509d7cd845.tar.gz gcc-905c20c1239ab74388b3c9017356e7509d7cd845.tar.bz2 |
tilegx.c (tilegx_function_arg): Start 16-byte arguments on even registers.
2014-01-25 Walter Lee <walt@tilera.com>
* config/tilegx/tilegx.c (tilegx_function_arg): Start 16-byte
arguments on even registers.
(tilegx_function_arg_advance): Ditto.
(tilegx_gimplify_va_arg_expr): Align 16-byte var args to
STACK_BOUNDARY.
* config/tilegx/tilegx.h (STACK_BOUNDARY): Change to 16 bytes.
(BIGGEST_ALIGNMENT): Ditto.
(BIGGEST_FIELD_ALIGNMENT): Ditto.
From-SVN: r207082
Diffstat (limited to 'gcc/config/tilegx')
-rw-r--r-- | gcc/config/tilegx/tilegx.c | 36 | ||||
-rw-r--r-- | gcc/config/tilegx/tilegx.h | 6 |
2 files changed, 36 insertions, 6 deletions
diff --git a/gcc/config/tilegx/tilegx.c b/gcc/config/tilegx/tilegx.c index 7694e31..f3c68e3 100644 --- a/gcc/config/tilegx/tilegx.c +++ b/gcc/config/tilegx/tilegx.c @@ -220,10 +220,18 @@ tilegx_function_arg (cumulative_args_t cum_v, CUMULATIVE_ARGS cum = *get_cumulative_args (cum_v); int byte_size = ((mode == BLKmode) ? int_size_in_bytes (type) : GET_MODE_SIZE (mode)); + bool doubleword_aligned_p; if (cum >= TILEGX_NUM_ARG_REGS) return NULL_RTX; + /* See whether the argument has doubleword alignment. */ + doubleword_aligned_p = + tilegx_function_arg_boundary (mode, type) > BITS_PER_WORD; + + if (doubleword_aligned_p) + cum += cum & 1; + /* The ABI does not allow parameters to be passed partially in reg and partially in stack. */ if ((cum + (byte_size + UNITS_PER_WORD - 1) / UNITS_PER_WORD) @@ -245,6 +253,14 @@ tilegx_function_arg_advance (cumulative_args_t cum_v, int byte_size = ((mode == BLKmode) ? int_size_in_bytes (type) : GET_MODE_SIZE (mode)); int word_size = (byte_size + UNITS_PER_WORD - 1) / UNITS_PER_WORD; + bool doubleword_aligned_p; + + /* See whether the argument has doubleword alignment. */ + doubleword_aligned_p = + tilegx_function_arg_boundary (mode, type) > BITS_PER_WORD; + + if (doubleword_aligned_p) + *cum += *cum & 1; /* If the current argument does not fit in the pretend_args space, skip over it. */ @@ -417,7 +433,7 @@ tilegx_setup_incoming_varargs (cumulative_args_t cum, generates code equivalent to: - paddedsize = (sizeof(TYPE) + 3) & -4; + paddedsize = (sizeof(TYPE) + 7) & -8; if ( (VALIST.__args + paddedsize > VALIST.__skip) & (VALIST.__args <= VALIST.__skip)) addr = VALIST.__skip + STACK_POINTER_OFFSET; @@ -457,9 +473,23 @@ tilegx_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, size = int_size_in_bytes (type); rsize = ((size + UNITS_PER_WORD - 1) / UNITS_PER_WORD) * UNITS_PER_WORD; - /* Assert alignment assumption. */ - gcc_assert (STACK_BOUNDARY == PARM_BOUNDARY); + /* If the alignment of the type is greater than the default for a + parameter, align to the STACK_BOUNDARY. */ + if (TYPE_ALIGN (type) > PARM_BOUNDARY) + { + /* Assert the only case we generate code for: when + stack boundary = 2 * parm boundary. */ + gcc_assert (STACK_BOUNDARY == PARM_BOUNDARY * 2); + + tmp = build2 (BIT_AND_EXPR, sizetype, + fold_convert (sizetype, unshare_expr (args)), + size_int (PARM_BOUNDARY / 8)); + tmp = build2 (POINTER_PLUS_EXPR, ptr_type_node, + unshare_expr (args), tmp); + gimplify_assign (unshare_expr (args), tmp, pre_p); + } + /* Build conditional expression to calculate addr. The expression will be gimplified later. */ tmp = fold_build_pointer_plus_hwi (unshare_expr (args), rsize); diff --git a/gcc/config/tilegx/tilegx.h b/gcc/config/tilegx/tilegx.h index 68f466c..9eab51e 100644 --- a/gcc/config/tilegx/tilegx.h +++ b/gcc/config/tilegx/tilegx.h @@ -59,9 +59,9 @@ #define UNITS_PER_WORD 8 #define PARM_BOUNDARY BITS_PER_WORD -#define STACK_BOUNDARY 64 +#define STACK_BOUNDARY 128 #define FUNCTION_BOUNDARY 64 -#define BIGGEST_ALIGNMENT 64 +#define BIGGEST_ALIGNMENT 128 #define STRICT_ALIGNMENT 1 #define INT_TYPE_SIZE 32 @@ -74,7 +74,7 @@ #define PCC_BITFIELD_TYPE_MATTERS 1 #define FASTEST_ALIGNMENT 64 -#define BIGGEST_FIELD_ALIGNMENT 64 +#define BIGGEST_FIELD_ALIGNMENT 128 #define WIDEST_HARDWARE_FP_SIZE 64 /* Unaligned moves trap and are very slow. */ |