diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/gcse.c | 5 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr79574.c | 10 |
4 files changed, 23 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index defd543..ec8049b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2017-02-17 Martin Liska <mliska@suse.cz> + PR rtl-optimization/79574 + * gcse.c (want_to_gcse_p): Prevent integer overflow. + +2017-02-17 Martin Liska <mliska@suse.cz> + PR tree-optimization/79529 * tree-ssa-loop-unswitch.c (is_maybe_undefined): Use ssa_defined_default_def_p to handle cases which are implicitly @@ -790,7 +790,7 @@ want_to_gcse_p (rtx x, machine_mode mode, int *max_distance_ptr) /* PRE doesn't implement max_distance restriction. */ { int cost; - int max_distance; + HOST_WIDE_INT max_distance; gcc_assert (!optimize_function_for_speed_p (cfun) && optimize_function_for_size_p (cfun)); @@ -798,7 +798,8 @@ want_to_gcse_p (rtx x, machine_mode mode, int *max_distance_ptr) if (cost < COSTS_N_INSNS (GCSE_UNRESTRICTED_COST)) { - max_distance = (GCSE_COST_DISTANCE_RATIO * cost) / 10; + max_distance + = ((HOST_WIDE_INT)GCSE_COST_DISTANCE_RATIO * cost) / 10; if (max_distance == 0) return 0; diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index abd9308..d0a95d4 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2017-02-17 Martin Liska <mliska@suse.cz> + + PR rtl-optimization/79574 + * gcc.dg/pr79574.c: New test. + 2017-02-17 Marek Polacek <polacek@redhat.com> PR middle-end/79536 diff --git a/gcc/testsuite/gcc.dg/pr79574.c b/gcc/testsuite/gcc.dg/pr79574.c new file mode 100644 index 0000000..1b666e2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr79574.c @@ -0,0 +1,10 @@ +/* PR rtl-optimization/79574 */ +/* { dg-do compile } */ +/* { dg-options "-Os --param gcse-cost-distance-ratio=2147483647" } */ + +void a (void) +{ + volatile int b; + for (;; b) + ; +} |