From: Matthew Fortune <[email protected]>
Expose it with an option: -mblockmov-limit. A memcpy strictly less than
this value will be considered for inlining.
gcc/ChangeLog:
* config/mips/mips.cc (mips_expand_block_move): Add support to
control size of inlined memcpy.
* config/mips/mips.opt (mblockmov-limit): New option.
Cherry-picked cf1e4960a4f80301e4c8f71a35cbbc8fef1ce6fd
from https://github.com/MIPS/gcc
Signed-off-by: Matthew Fortune <[email protected]>
Signed-off-by: Faraz Shahbazker <[email protected]>
Signed-off-by: Aleksandar Rakic <[email protected]>
---
gcc/config/mips/mips.cc | 21 ++++++++++++---------
gcc/config/mips/mips.opt | 3 +++
2 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/gcc/config/mips/mips.cc b/gcc/config/mips/mips.cc
index 32fe62ce79b..d9c913f2e23 100644
--- a/gcc/config/mips/mips.cc
+++ b/gcc/config/mips/mips.cc
@@ -9360,16 +9360,19 @@ mips_expand_block_move (rtx dest, rtx src, rtx length)
|| MEM_ALIGN (dest) < MIPS_MIN_MOVE_MEM_ALIGN))
return false;
- if (INTVAL (length) <= MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER)
+ if (mips_movmem_limit == -1 || INTVAL (length) < mips_movmem_limit)
{
- mips_block_move_straight (dest, src, INTVAL (length));
- return true;
- }
- else if (optimize)
- {
- mips_block_move_loop (dest, src, INTVAL (length),
- MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER);
- return true;
+ if (INTVAL (length) <= MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER)
+ {
+ mips_block_move_straight (dest, src, INTVAL (length));
+ return true;
+ }
+ else if (optimize)
+ {
+ mips_block_move_loop (dest, src, INTVAL (length),
+ MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER);
+ return true;
+ }
}
return false;
diff --git a/gcc/config/mips/mips.opt b/gcc/config/mips/mips.opt
index 012ca91560f..a4b93de924d 100644
--- a/gcc/config/mips/mips.opt
+++ b/gcc/config/mips/mips.opt
@@ -556,3 +556,6 @@ munique-sections=FILE Use to specify sections that should
be made unique.
mfunc-opt-list=
Target RejectNegative Joined Var(mips_func_opt_list_file) Init(0) Defer
mfunc-opt-list=FILE Use to specify per function optimizations.
+
+mblockmov-limit=
+Target RejectNegative Undocumented Joined UInteger Var(mips_movmem_limit)
Init(-1)
--
2.34.1
