It's relatively common to have to add an instruction at the end of a BB.
More exactly, at the end but just before the terminator instruction.
What is done for this is:
1) remove the terminator
2) add the new instruction
3) add the terminator back
This is a bit tedious, need to declare a temporary variable for the
terminator and, more generally, it's low-level details.
So, add an helper for doing this: insert_last_instruction().
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
linearize.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/linearize.h b/linearize.h
index b6c8bf134065..493f6be1074c 100644
--- a/linearize.h
+++ b/linearize.h
@@ -195,6 +195,14 @@ static inline void add_instruction(struct instruction_list **list, struct instru
add_ptr_list(list, insn);
}
+static inline void insert_last_instruction(struct basic_block *bb, struct instruction *insn)
+{
+ struct instruction *last = delete_last_instruction(&bb->insns);
+ add_instruction(&bb->insns, insn);
+ add_instruction(&bb->insns, last);
+ insn->bb = bb;
+}
+
static inline void add_multijmp(struct multijmp_list **list, struct multijmp *multijmp)
{
add_ptr_list(list, multijmp);
--
2.31.0
