From: "Torbjörn SVENSSON" <torbjorn.svensson@foss.st.com>
To: <gcc-patches@gcc.gnu.org>
Cc: vmakarov@redhat.com, yvan.roux@foss.st.com,
"Torbjörn SVENSSON" <torbjorn.svensson@foss.st.com>
Subject: [PATCH] IRA: Make sure array is big enough
Date: Tue, 25 Oct 2022 12:01:04 +0200 [thread overview]
Message-ID: <20221025100103.1736564-1-torbjorn.svensson@foss.st.com> (raw)
In commit 081c96621da, the call to resize_reg_info() was moved before
the call to remove_scratches() and the latter one can increase the
number of regs and that would cause an out of bounds usage on the
reg_renumber global array.
Without this patch, the following testcase randomly fails with:
during RTL pass: ira
In file included from /src/gcc/testsuite/gcc.dg/compat//struct-by-value-5b_y.c:13:
/src/gcc/testsuite/gcc.dg/compat//struct-by-value-5b_y.c: In function 'checkgSf13':
/src/gcc/testsuite/gcc.dg/compat//fp-struct-test-by-value-y.h:28:1: internal compiler error: Segmentation fault
/src/gcc/testsuite/gcc.dg/compat//struct-by-value-5b_y.c:22:1: note: in expansion of macro 'TEST'
gcc/ChangeLog:
* ira.c: Resize array after reg number increased.
Co-Authored-By: Yvan ROUX <yvan.roux@foss.st.com>
Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>
---
gcc/ira.cc | 1 +
1 file changed, 1 insertion(+)
diff --git a/gcc/ira.cc b/gcc/ira.cc
index 42c9cead9f8..d28a67b2546 100644
--- a/gcc/ira.cc
+++ b/gcc/ira.cc
@@ -5718,6 +5718,7 @@ ira (FILE *f)
regstat_free_ri ();
regstat_init_n_sets_and_refs ();
regstat_compute_ri ();
+ resize_reg_info ();
};
int max_regno_before_rm = max_reg_num ();
--
2.25.1
next reply other threads:[~2022-10-25 10:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-25 10:01 Torbjörn SVENSSON [this message]
2022-10-26 20:26 ` Vladimir Makarov
2022-10-27 7:42 ` Torbjorn SVENSSON
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