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author | Marc Glisse <marc.glisse@inria.fr> | 2013-08-24 00:16:08 +0200 |
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committer | Marc Glisse <glisse@gcc.gnu.org> | 2013-08-23 22:16:08 +0000 |
commit | 0cadbfaa89805ce4d1b93bed04c10d7c7bf1f6e2 (patch) | |
tree | fd1a5007e3c6c876ebf4f1982aa74584d82afc0d /gcc/expmed.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/expmed.c')
-rw-r--r-- | gcc/expmed.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index 79f3424..d18f09f 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -3697,11 +3697,11 @@ expand_smod_pow2 (enum machine_mode mode, rtx op0, HOST_WIDE_INT d) masklow = ((HOST_WIDE_INT) 1 << logd) - 1; if (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT) { - masklow |= (HOST_WIDE_INT) -1 << (GET_MODE_BITSIZE (mode) - 1); + masklow |= HOST_WIDE_INT_M1U << (GET_MODE_BITSIZE (mode) - 1); maskhigh = -1; } else - maskhigh = (HOST_WIDE_INT) -1 + maskhigh = HOST_WIDE_INT_M1U << (GET_MODE_BITSIZE (mode) - HOST_BITS_PER_WIDE_INT - 1); temp = expand_binop (mode, and_optab, op0, @@ -3715,7 +3715,7 @@ expand_smod_pow2 (enum machine_mode mode, rtx op0, HOST_WIDE_INT d) temp = expand_binop (mode, sub_optab, result, const1_rtx, result, 0, OPTAB_LIB_WIDEN); - masklow = (HOST_WIDE_INT) -1 << logd; + masklow = HOST_WIDE_INT_M1U << logd; maskhigh = -1; temp = expand_binop (mode, ior_optab, temp, immed_double_const (masklow, maskhigh, mode), |