| commit | 4b421728289e6f1caa0dfaa953a11698ab95d37d | |
| author | Yang Yujie <yangyujie@loongson.cn> | |
| Fri, 8 Dec 2023 10:01:18 +0000 (8 18:01 +0800) | ||
| committer | Lulu Cheng <chenglulu@loongson.cn> | |
| Tue, 12 Dec 2023 02:02:03 +0000 (12 10:02 +0800) | ||
| tree | 6da9a92785d6030ff769006e35222bdc8423cf0d | treesnapshot (tar.gz zip) |
| parent | 46cfafad9b3e64e9cd060b7a26bfe1890c74135f | commitdiff |
LoongArch: Fix eh_return epilogue for normal returns.
On LoongArch, the regitsters $r4 - $r7 (EH_RETURN_DATA_REGNO) will be saved
and restored in the function prologue and epilogue if the given function calls
__builtin_eh_return. This causes the return value to be overwritten on normal
return paths and breaks a rare case of libgcc's _Unwind_RaiseException.
gcc/ChangeLog:
* config/loongarch/loongarch.cc: Do not restore the saved eh_return
data registers ($r4-$r7) for a normal return of a function that calls
__builtin_eh_return elsewhere.
* config/loongarch/loongarch-protos.h: Same.
* config/loongarch/loongarch.md: Same.
gcc/testsuite/ChangeLog:
* gcc.target/loongarch/eh_return-normal-return.c: New test.
On LoongArch, the regitsters $r4 - $r7 (EH_RETURN_DATA_REGNO) will be saved
and restored in the function prologue and epilogue if the given function calls
__builtin_eh_return. This causes the return value to be overwritten on normal
return paths and breaks a rare case of libgcc's _Unwind_RaiseException.
gcc/ChangeLog:
* config/loongarch/loongarch.cc: Do not restore the saved eh_return
data registers ($r4-$r7) for a normal return of a function that calls
__builtin_eh_return elsewhere.
* config/loongarch/loongarch-protos.h: Same.
* config/loongarch/loongarch.md: Same.
gcc/testsuite/ChangeLog:
* gcc.target/loongarch/eh_return-normal-return.c: New test.