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| author | Marc Glisse <marc.glisse@inria.fr> | 2013-08-24 00:16:08 +0200 |
|---|---|---|
| committer | Marc Glisse <glisse@gcc.gnu.org> | 2013-08-23 22:16:08 +0000 |
| commit | 0cadbfaa89805ce4d1b93bed04c10d7c7bf1f6e2 (patch) | |
| tree | fd1a5007e3c6c876ebf4f1982aa74584d82afc0d /gcc/tree.c | |
| parent | 4500f676e138a5ea3337ebd47745d8b49ba775b5 (diff) | |
| download | gcc-0cadbfaa89805ce4d1b93bed04c10d7c7bf1f6e2.zip gcc-0cadbfaa89805ce4d1b93bed04c10d7c7bf1f6e2.tar.gz gcc-0cadbfaa89805ce4d1b93bed04c10d7c7bf1f6e2.tar.bz2 | |
re PR other/57324 (Undefined behavior issues found with clang's -fsanitize=undefined)
2013-08-24 Marc Glisse <marc.glisse@inria.fr>
PR other/57324
* hwint.h (HOST_WIDE_INT_UC, HOST_WIDE_INT_1U, HOST_WIDE_INT_M1,
HOST_WIDE_INT_M1U): New macros.
* fold-const.c (sign_bit_p, build_range_check, fold_unary_loc,
fold_binary_loc, fold_ternary_loc): Use the new macros. Use an
unsigned -1 for lshift.
* cse.c (cse_insn): Likewise.
* double-int.c (rshift_double, lshift_double): Likewise.
* builtins.c (fold_builtin_bitop): Likewise.
* combine.c (force_to_mode): Likewise.
* tree.c (integer_pow2p, tree_log2, tree_floor_log2): Likewise.
* simplify-rtx.c (simplify_const_unary_operation,
simplify_const_binary_operation): Likewise.
* tree-stdarg.c (va_list_counter_bump, va_list_ptr_read,
check_va_list_escapes): Likewise.
* rtlanal.c (nonzero_bits1): Likewise.
* expmed.c (expand_smod_pow2): Likewise.
* tree-ssa-structalias.c (UNKNOWN_OFFSET): Use HOST_WIDE_INT_MIN.
From-SVN: r201953
Diffstat (limited to 'gcc/tree.c')
| -rw-r--r-- | gcc/tree.c | 12 |
1 files changed, 6 insertions, 6 deletions
@@ -2051,12 +2051,12 @@ integer_pow2p (const_tree expr) if (prec == HOST_BITS_PER_DOUBLE_INT) ; else if (prec > HOST_BITS_PER_WIDE_INT) - high &= ~((HOST_WIDE_INT) (-1) << (prec - HOST_BITS_PER_WIDE_INT)); + high &= ~(HOST_WIDE_INT_M1U << (prec - HOST_BITS_PER_WIDE_INT)); else { high = 0; if (prec < HOST_BITS_PER_WIDE_INT) - low &= ~((HOST_WIDE_INT) (-1) << prec); + low &= ~(HOST_WIDE_INT_M1U << prec); } if (high == 0 && low == 0) @@ -2115,12 +2115,12 @@ tree_log2 (const_tree expr) if (prec == HOST_BITS_PER_DOUBLE_INT) ; else if (prec > HOST_BITS_PER_WIDE_INT) - high &= ~((HOST_WIDE_INT) (-1) << (prec - HOST_BITS_PER_WIDE_INT)); + high &= ~(HOST_WIDE_INT_M1U << (prec - HOST_BITS_PER_WIDE_INT)); else { high = 0; if (prec < HOST_BITS_PER_WIDE_INT) - low &= ~((HOST_WIDE_INT) (-1) << prec); + low &= ~(HOST_WIDE_INT_M1U << prec); } return (high != 0 ? HOST_BITS_PER_WIDE_INT + exact_log2 (high) @@ -2152,12 +2152,12 @@ tree_floor_log2 (const_tree expr) if (prec == HOST_BITS_PER_DOUBLE_INT || prec == 0) ; else if (prec > HOST_BITS_PER_WIDE_INT) - high &= ~((HOST_WIDE_INT) (-1) << (prec - HOST_BITS_PER_WIDE_INT)); + high &= ~(HOST_WIDE_INT_M1U << (prec - HOST_BITS_PER_WIDE_INT)); else { high = 0; if (prec < HOST_BITS_PER_WIDE_INT) - low &= ~((HOST_WIDE_INT) (-1) << prec); + low &= ~(HOST_WIDE_INT_M1U << prec); } return (high != 0 ? HOST_BITS_PER_WIDE_INT + floor_log2 (high) |