https://gcc.gnu.org/g:24df430108c0cdf83d7cccd69367a977adca7da0
commit r15-6351-g24df430108c0cdf83d7cccd69367a977adca7da0
Author: Vladimir N. Makarov <vmaka...@redhat.com>
Date: Wed Dec 18 14:00:38 2024 -0500
[PR117248][LRA]: Fix calculation of conflict hard regs of pseudo
The 1st patch for PR117248 resulted in PR117299 (libgo failures on arm).
So this is a patch
solving the problem in another way.
gcc/ChangeLog:
PR rtl-optimization/117248
* lra-lives.cc (process_bb_lives): Update conflict hard regs even
when clobber hard reg is not marked as dead.
Diff:
---
gcc/lra-lives.cc | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/gcc/lra-lives.cc b/gcc/lra-lives.cc
index 510f7d927ab0..94cb000bc5a1 100644
--- a/gcc/lra-lives.cc
+++ b/gcc/lra-lives.cc
@@ -1006,7 +1006,15 @@ process_bb_lives (basic_block bb, int &curr_point, bool
dead_insn_p)
clobbered_regset))
break;
if (reg2 == NULL)
- make_hard_regno_dead (reg->regno);
+ {
+ make_hard_regno_dead (reg->regno);
+ }
+ else
+ {
+ EXECUTE_IF_SET_IN_SPARSESET (pseudos_live, j)
+ SET_HARD_REG_BIT (lra_reg_info[j].conflict_hard_regs,
+ reg->regno);
+ }
}
/* Increment the current program point if we must. */
