[PATCH] RISC-V: In pipeline scheduling, insns should not be fusion in different BB blocks.

[Jin Ma via Gcc-patches]

When the last insn1 of BB1 and the first insn2 of BB2 are fusion, insn2 will
clear all dependencies in the function chain_to_prev_insn, resulting in insn2
may mov to any BB, and the program calculation result is wrong.

gcc/ChangeLog:

        * sched-deps.cc (sched_macro_fuse_insns): Insns should not be fusion
        in different BB blocks
---
 gcc/sched-deps.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/sched-deps.cc b/gcc/sched-deps.cc
index 2aa6623ad2e..998fe930804 100644
--- a/gcc/sched-deps.cc
+++ b/gcc/sched-deps.cc
@@ -2833,7 +2833,7 @@ sched_macro_fuse_insns (rtx_insn *insn)
      compile time complexity.  */
   if (DEBUG_INSN_P (insn))
     return;
-  prev = prev_nonnote_nondebug_insn (insn);
+  prev = prev_nonnote_nondebug_insn_bb (insn);
   if (!prev)
     return;
 
-- 
2.17.1