Pushed to r14-5864.
在 2023/11/23 上午11:05, Guo Jie 写道:
gcc/ChangeLog:
* config/loongarch/loongarch.cc (loongarch_split_plus_constant):
avoid left shift of negative value -0x8000.
---
gcc/config/loongarch/loongarch.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/config/loongarch/loongarch.cc
b/gcc/config/loongarch/loongarch.cc
index 33357c670e1..81cd9fa1e7c 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -4249,7 +4249,7 @@ 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 ();