On 2022-10-25 06:01, Torbjörn SVENSSON wrote:
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.
The patch is ok to commit it into gcc-11,12 branches and master.
Thank you for fixing this.
Co-Authored-By: Yvan ROUX <yvan.r...@foss.st.com>
Signed-off-by: Torbjörn SVENSSON <torbjorn.svens...@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 ();
