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git.ipfire.org Git - thirdparty/gcc.git/commit - gcc/config/riscv/riscv-vsetvl.cc
RISC-V: Fix ICE in extract_single_source
This patch fixes the following ICE in VSETVL PASS:
bug.c:39:1: internal compiler error: Segmentation fault
39 | }
| ^
0x1ad5a08 crash_signal
../../../../gcc/gcc/toplev.cc:316
0x7f7f55feb90f ???
./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0x218d7c7 extract_single_source
../../../../gcc/gcc/config/riscv/riscv-vsetvl.cc:583
0x218d95d extract_single_source
../../../../gcc/gcc/config/riscv/riscv-vsetvl.cc:604
0x218fbc5 pre_vsetvl::compute_lcm_local_properties()
../../../../gcc/gcc/config/riscv/riscv-vsetvl.cc:2703
0x2190ef4 pre_vsetvl::earliest_fuse_vsetvl_info()
../../../../gcc/gcc/config/riscv/riscv-vsetvl.cc:2890
0x2193e62 pass_vsetvl::lazy_vsetvl()
../../../../gcc/gcc/config/riscv/riscv-vsetvl.cc:3537
0x219406a pass_vsetvl::execute(function*)
../../../../gcc/gcc/config/riscv/riscv-vsetvl.cc:3584
The rootcause we have a case that the def info can not be traced:
(insn 208 327 333 27 (use (reg/i:DI 10 a0)) "bug.c":36:1 -1
(nil))
It's obvious, we conservatively disable any optimization in this situation if
AVL def_info can not be tracded.
Committed as it is obvious.
gcc/ChangeLog:
* config/riscv/riscv-vsetvl.cc (extract_single_source): Fix ICE.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/vsetvl/avl_use_bug-1.c: New test.