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| author | Guo Jie <guojie@loongson.cn> | 2023-11-23 11:05:56 +0800 |
|---|---|---|
| committer | Lulu Cheng <chenglulu@loongson.cn> | 2023-11-27 10:47:48 +0800 |
| commit | 8b9d0e8cf482287b6c37b5a268d0eb2d0a964561 (patch) | |
| tree | c23e84bc7c6f8ddce0928595fe61a167e7a43569 | |
| parent | 96577dfae97e49a052c0b4d9843fb10f89632fd9 (diff) | |
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LoongArch: Fix runtime error in a gcc build with --with-build-config=bootstrap-ubsan
gcc/ChangeLog:
* config/loongarch/loongarch.cc (loongarch_split_plus_constant):
avoid left shift of negative value -0x8000.
| -rw-r--r-- | gcc/config/loongarch/loongarch.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc index c95fc83..d3896d7 100644 --- a/gcc/config/loongarch/loongarch.cc +++ b/gcc/config/loongarch/loongarch.cc @@ -4269,7 +4269,7 @@ loongarch_split_plus_constant (rtx *op, machine_mode mode) else if (loongarch_addu16i_imm12_operand_p (v, mode)) a = (v & ~HWIT_UC_0xFFF) + ((v & 0x800) << 1); else if (mode == DImode && DUAL_ADDU16I_OPERAND (v)) - a = (v > 0 ? 0x7fff : -0x8000) << 16; + a = (v > 0 ? 0x7fff0000 : ~0x7fffffff); else gcc_unreachable (); |