diff options
| author | dj <dj@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-06-01 00:20:13 +0000 |
|---|---|---|
| committer | dj <dj@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-06-01 00:20:13 +0000 |
| commit | 0663398065295b8b03266c3f4a1df130d6bdf712 (patch) | |
| tree | ad8920def875a4093b66cd5ff53f14ecb758f32a /gcc/expr.c | |
| parent | 58f70b5c59a190feb5fb0b1beb8ee9b6dad292ef (diff) | |
| download | gcc-0663398065295b8b03266c3f4a1df130d6bdf712.tar.gz | |
* expr.c (convert_move): When a partial_int requires multiple
conversion steps, make sure successive steps convert the
intermediate value, not the original value.
* expmed.c (expand_mult): Convert partial_int multiplies to
shift/add combinations too.
* genmodes.c (mode_data): Add wider_2x.
(calc_wider_mode): Calculate twice-wider mode too.
(emit_mode_wider): Emit twice-wider mode too.
* machmode.h (mode_2xwider, GET_MODE_2XWIDER_MODE): New.
* expr.c (expand_expr_real_1): Use it for expanding
multiplies.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@100414 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/gcc/expr.c b/gcc/expr.c index 459c248f420..5cb883a7ef0 100644 --- a/gcc/expr.c +++ b/gcc/expr.c @@ -466,19 +466,27 @@ convert_move (rtx to, rtx from, int unsignedp) } if (GET_MODE_CLASS (from_mode) == MODE_PARTIAL_INT) { + rtx new_from; enum machine_mode full_mode = smallest_mode_for_size (GET_MODE_BITSIZE (from_mode), MODE_INT); gcc_assert (sext_optab->handlers[full_mode][from_mode].insn_code != CODE_FOR_nothing); - emit_unop_insn (sext_optab->handlers[full_mode][from_mode].insn_code, - to, from, UNKNOWN); if (to_mode == full_mode) - return; + { + emit_unop_insn (sext_optab->handlers[full_mode][from_mode].insn_code, + to, from, UNKNOWN); + return; + } + + new_from = gen_reg_rtx (full_mode); + emit_unop_insn (sext_optab->handlers[full_mode][from_mode].insn_code, + new_from, from, UNKNOWN); /* else proceed to integer conversions below. */ from_mode = full_mode; + from = new_from; } /* Now both modes are integers. */ @@ -7747,7 +7755,7 @@ expand_expr_real_1 (tree exp, rtx target, enum machine_mode tmode, optab other_optab = zextend_p ? smul_widen_optab : umul_widen_optab; this_optab = zextend_p ? umul_widen_optab : smul_widen_optab; - if (mode == GET_MODE_WIDER_MODE (innermode)) + if (mode == GET_MODE_2XWIDER_MODE (innermode)) { if (this_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing) { |