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| author | Bernd Schmidt <bernds@codesourcery.com> | 2011-07-06 14:21:03 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2011-07-06 14:21:03 +0000 |
| commit | 2d0c270fd266218ff040965bb8231729df9144f1 (patch) | |
| tree | 2a2d891d415bcfdd26b794dc666ecd03b7565eee /gcc/expr.c | |
| parent | 6d6c952527c53637280297b2e6a48d6b21606294 (diff) | |
| download | gcc-2d0c270fd266218ff040965bb8231729df9144f1.zip gcc-2d0c270fd266218ff040965bb8231729df9144f1.tar.gz gcc-2d0c270fd266218ff040965bb8231729df9144f1.tar.bz2 | |
cse.c (find_comparison_args): Use val_mode_signbit_set_p.
* cse.c (find_comparison_args): Use val_mode_signbit_set_p.
* simplify-rtx.c (mode_signbit_p): Use GET_MODE_PRECISION.
(val_mode_signbit_p, val_mode_signbit_set_p): New functions.
(simplify_const_unary_operation, simplify_binary_operation_1,
simplify_const_binary_operation,
simplify_const_relational_operation): Use them. Use
GET_MODE_MASK for masking and sign-extensions.
* combine.c (set_nonzero_bits_and_sign_copies, simplify_set,
combine_simplify_rtx, force_to_mode, reg_nonzero_bits_for_combine,
simplify_shift_const_1, simplify_comparison): Likewise.
* expr.c (convert_modes): Likewise.
* rtlanal.c (nonzero_bits1, canonicalize_condition): Likewise.
* expmed.c (emit_cstore, emit_store_flag_1, emit_store_flag):
Likewise.
* rtl.h (val_mode_signbit_p, val_mode_signbit_set_p): Declare.
From-SVN: r175917
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 7 |
1 files changed, 3 insertions, 4 deletions
@@ -764,14 +764,13 @@ convert_modes (enum machine_mode mode, enum machine_mode oldmode, rtx x, int uns && GET_MODE_SIZE (mode) > GET_MODE_SIZE (oldmode)) { HOST_WIDE_INT val = INTVAL (x); - int width = GET_MODE_BITSIZE (oldmode); /* We must sign or zero-extend in this case. Start by zero-extending, then sign extend if we need to. */ - val &= ((HOST_WIDE_INT) 1 << width) - 1; + val &= GET_MODE_MASK (oldmode); if (! unsignedp - && (val & ((HOST_WIDE_INT) 1 << (width - 1)))) - val |= (HOST_WIDE_INT) (-1) << width; + && val_signbit_known_set_p (oldmode, val)) + val |= ~GET_MODE_MASK (oldmode); return gen_int_mode (val, mode); } |