diff options
| author | Markus Trippelsdorf <markus@trippelsdorf.de> | 2014-11-20 16:36:14 +0000 |
|---|---|---|
| committer | Markus Trippelsdorf <trippels@gcc.gnu.org> | 2014-11-20 16:36:14 +0000 |
| commit | d7ca26e4167f1c7abe50041c838111ee4fab15d1 (patch) | |
| tree | bd5b144b7bbe1e7b714275f855291e53127e214a /gcc/loop-iv.c | |
| parent | 46ed60245a76b90e6161134fc6a22480aa1248fe (diff) | |
PR63426 Fix various signed integer overflows
Running the testsuite after bootstrap-ubsan on gcc112 shows several issues. See
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426 for the full list.
This patch fixes several of them.
2014-11-20 Markus Trippelsdorf <markus@trippelsdorf.de>
* config/rs6000/constraints.md: Avoid signed integer overflows.
* config/rs6000/predicates.md: Likewise.
* config/rs6000/rs6000.c (num_insns_constant_wide): Likewise.
(includes_rldic_lshift_p): Likewise.
(includes_rldicr_lshift_p): Likewise.
* emit-rtl.c (const_wide_int_htab_hash): Likewise.
* loop-iv.c (determine_max_iter): Likewise.
(iv_number_of_iterations): Likewise.
* tree-ssa-loop-ivopts.c (get_computation_cost_at): Likewise.
* varasm.c (get_section_anchor): Likewise.
From-SVN: r217886
Diffstat (limited to 'gcc/loop-iv.c')
| -rw-r--r-- | gcc/loop-iv.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/loop-iv.c b/gcc/loop-iv.c index 8ea458c3fc5..f55cea2a985 100644 --- a/gcc/loop-iv.c +++ b/gcc/loop-iv.c @@ -2311,7 +2311,7 @@ determine_max_iter (struct loop *loop, struct niter_desc *desc, rtx old_niter) } get_mode_bounds (desc->mode, desc->signed_p, desc->mode, &mmin, &mmax); - nmax = INTVAL (mmax) - INTVAL (mmin); + nmax = UINTVAL (mmax) - UINTVAL (mmin); if (GET_CODE (niter) == UDIV) { @@ -2649,7 +2649,7 @@ iv_number_of_iterations (struct loop *loop, rtx_insn *insn, rtx condition, down = INTVAL (CONST_INT_P (iv0.base) ? iv0.base : mode_mmin); - max = (up - down) / inc + 1; + max = (uint64_t) (up - down) / inc + 1; if (!desc->infinite && !desc->assumptions) record_niter_bound (loop, max, false, true); |