On 2020-11-02 4:30 p.m., Vladimir Makarov via Gcc-patches wrote:
On 2020-11-02 3:12 p.m., Christophe Lyon wrote:
Hi,
This patch causes ICEs on arm (eg arm-none-linux-gnueabi)
gcc.c-torture/compile/sync-3.c -O1 (internal compiler error)
gcc.c-torture/compile/sync-3.c -O2 (internal compiler error)
gcc.c-torture/compile/sync-3.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none (internal compiler error)
gcc.c-torture/compile/sync-3.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects (internal compiler error)
gcc.c-torture/compile/sync-3.c -O3 -g (internal compiler error)
gcc.c-torture/compile/sync-3.c -Os (internal compiler error)
gcc.log says:
FAIL: gcc.c-torture/compile/sync-3.c -O1 (internal compiler error)
PASS: gcc.c-torture/compile/sync-3.c -O1 (test for warnings, line )
FAIL: gcc.c-torture/compile/sync-3.c -O1 (test for excess errors)
Excess errors:
during RTL pass: ira
/gcc/testsuite/gcc.c-torture/compile/sync-3.c:85:1: internal compiler
error: Segmentation fault
0xcf8b1f crash_signal
/gcc/toplev.c:330
0xaeb0a0 fix_reg_equiv_init
/gcc/ira.c:2671
0xaf2113 find_moveable_pseudos
/gcc/ira.c:4874
0xaf48e8 ira
/gcc/ira.c:5533
0xaf48e8 execute
/gcc/ira.c:5861
Thank you for sending this info. I reproduced the crash with
x86-64-arm cross-compiler although it is absent on native arm
environment. I will have a fix tomorrow.
I've fixed it.
