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re PR middle-end/79809 (ICE in alloca_call_type, at gimple-ssa-warn-alloca.c:282)

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PR middle-end/79809
	* gimple-ssa-warn-alloca.c (pass_walloca::gate): Use HOST_WIDE_INT.
	(alloca_call_type): Likewise.

	* g++.dg/Walloca1.C: New test.

From-SVN: r245955
This commit is contained in:
Marek Polacek 2017-03-07 17:30:53 +00:00 committed by Marek Polacek
parent ec38330401
commit d8a90142db
4 changed files with 21 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-03-07 Marek Polacek <polacek@redhat.com>
PR middle-end/79809
* gimple-ssa-warn-alloca.c (pass_walloca::gate): Use HOST_WIDE_INT.
(alloca_call_type): Likewise.
2017-03-07 Martin Liska <mliska@suse.cz>
* gcov.c (process_args): Put comment to correct location.

7
gcc/gimple-ssa-warn-alloca.c
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@ -78,7 +78,8 @@ pass_walloca::gate (function *fun ATTRIBUTE_UNUSED)
if (first_time_p)
return warn_alloca != 0;
return warn_alloca_limit > 0 || warn_vla_limit > 0;
return ((unsigned HOST_WIDE_INT) warn_alloca_limit > 0
|| (unsigned HOST_WIDE_INT) warn_vla_limit > 0);
}
// Possible problematic uses of alloca.
@ -278,8 +279,8 @@ alloca_call_type (gimple *stmt, bool is_vla, tree *invalid_casted_type)
wide_int min, max;
struct alloca_type_and_limit ret = alloca_type_and_limit (ALLOCA_UNBOUNDED);
gcc_assert (!is_vla || warn_vla_limit > 0);
gcc_assert (is_vla || warn_alloca_limit > 0);
gcc_assert (!is_vla || (unsigned HOST_WIDE_INT) warn_vla_limit > 0);
gcc_assert (is_vla || (unsigned HOST_WIDE_INT) warn_alloca_limit > 0);
// Adjust warn_alloca_max_size for VLAs, by taking the underlying
// type into account.

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2017-03-07 Marek Polacek <polacek@redhat.com>
PR middle-end/79809
* g++.dg/Walloca1.C: New test.
2017-03-07 Martin Liska <mliska@suse.cz>
PR middle-end/68270

6
gcc/testsuite/g++.dg/Walloca1.C Normal file
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@ -0,0 +1,6 @@
/* PR middle-end/79809 */
/* { dg-do compile } */
/* { dg-options "-Walloca-larger-than=4207115063 -Wvla-larger-than=1233877270 -O2" } */
int a;
char *b = static_cast<char *>(__builtin_alloca (a)); // { dg-warning "argument to .alloca. may be too large" }