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| author | Richard Sandiford <r.sandiford@uk.ibm.com> | 2014-05-13 13:51:32 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2014-05-13 13:51:32 +0000 |
| commit | 5c0f009c926cc78fb15f1c5cfa46071a4359c9e9 (patch) | |
| tree | a2681403400c9db983ff2514e2db4f046aee6a3a /gcc/fold-const.c | |
| parent | 460d1e22353835f4cf8749aedd07387185146eb6 (diff) | |
| download | gcc-5c0f009c926cc78fb15f1c5cfa46071a4359c9e9.zip gcc-5c0f009c926cc78fb15f1c5cfa46071a4359c9e9.tar.gz gcc-5c0f009c926cc78fb15f1c5cfa46071a4359c9e9.tar.bz2 | |
fold-const.c (optimize_bit_field_compare): Use wi:: operations instead of const_binop.
gcc/
* fold-const.c (optimize_bit_field_compare): Use wi:: operations
instead of const_binop.
(fold_binary_loc): Likewise.
From-SVN: r210378
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 0fcb87f..5e064df 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -3444,7 +3444,7 @@ optimize_bit_field_compare (location_t loc, enum tree_code code, { HOST_WIDE_INT lbitpos, lbitsize, rbitpos, rbitsize, nbitpos, nbitsize; tree type = TREE_TYPE (lhs); - tree signed_type, unsigned_type; + tree unsigned_type; int const_p = TREE_CODE (rhs) == INTEGER_CST; enum machine_mode lmode, rmode, nmode; int lunsignedp, runsignedp; @@ -3489,7 +3489,6 @@ optimize_bit_field_compare (location_t loc, enum tree_code code, /* Set signed and unsigned types of the precision of this mode for the shifts below. */ - signed_type = lang_hooks.types.type_for_mode (nmode, 0); unsigned_type = lang_hooks.types.type_for_mode (nmode, 1); /* Compute the bit position and size for the new reference and our offset @@ -3538,10 +3537,7 @@ optimize_bit_field_compare (location_t loc, enum tree_code code, if (lunsignedp) { - if (! integer_zerop (const_binop (RSHIFT_EXPR, - fold_convert_loc (loc, - unsigned_type, rhs), - size_int (lbitsize)))) + if (wi::lrshift (rhs, lbitsize) != 0) { warning (0, "comparison is always %d due to width of bit-field", code == NE_EXPR); @@ -3550,10 +3546,8 @@ optimize_bit_field_compare (location_t loc, enum tree_code code, } else { - tree tem = const_binop (RSHIFT_EXPR, - fold_convert_loc (loc, signed_type, rhs), - size_int (lbitsize - 1)); - if (! integer_zerop (tem) && ! integer_all_onesp (tem)) + wide_int tem = wi::arshift (rhs, lbitsize - 1); + if (tem != 0 && tem != -1) { warning (0, "comparison is always %d due to width of bit-field", code == NE_EXPR); @@ -10356,9 +10350,8 @@ fold_binary_loc (location_t loc, && TREE_CODE (arg1) == BIT_AND_EXPR && TREE_CODE (TREE_OPERAND (arg0, 1)) == INTEGER_CST && TREE_CODE (TREE_OPERAND (arg1, 1)) == INTEGER_CST - && integer_zerop (const_binop (BIT_AND_EXPR, - TREE_OPERAND (arg0, 1), - TREE_OPERAND (arg1, 1)))) + && wi::bit_and (TREE_OPERAND (arg0, 1), + TREE_OPERAND (arg1, 1)) == 0) { code = BIT_IOR_EXPR; goto bit_ior; @@ -11478,9 +11471,8 @@ fold_binary_loc (location_t loc, && TREE_CODE (arg1) == BIT_AND_EXPR && TREE_CODE (TREE_OPERAND (arg0, 1)) == INTEGER_CST && TREE_CODE (TREE_OPERAND (arg1, 1)) == INTEGER_CST - && integer_zerop (const_binop (BIT_AND_EXPR, - TREE_OPERAND (arg0, 1), - TREE_OPERAND (arg1, 1)))) + && wi::bit_and (TREE_OPERAND (arg0, 1), + TREE_OPERAND (arg1, 1)) == 0) { code = BIT_IOR_EXPR; goto bit_ior; |