We found that using the latest compiled gcc will cause a miscompare error
when running spec2006 400.perlbench test with -flto turned on. After testing,
it was found that only the LoongArch architecture will report errors.
The first error commit was located through the git bisect command as
r14-3773-g5b857e87201335. Through debugging, it was found that the problem
was that the split condition of the *bstrins_<mode>_for_ior_mask template was
empty, which should actually be consistent with the insn condition.
gcc/ChangeLog:
* config/loongarch/loongarch.md: Adjust.
---
gcc/config/loongarch/loongarch.md | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/config/loongarch/loongarch.md
b/gcc/config/loongarch/loongarch.md
index 7021105b241..2b0609f2f31 100644
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -1489,7 +1489,7 @@ (define_insn_and_split "*bstrins_<mode>_for_ior_mask"
"loongarch_pre_reload_split () && \
loongarch_use_bstrins_for_ior_with_mask (<MODE>mode, operands)"
"#"
- ""
+ "&& true"
[(set (match_dup 0) (match_dup 1))
(set (zero_extract:GPR (match_dup 0) (match_dup 2) (match_dup 4))
(match_dup 3))]
--
2.39.3
