From: Andreas Larsson <andr...@gaisler.com>
LEON5 has a deeper write-buffer and hence stb is not enough to flush a
write out. For compatibility, use the default V8 approach for both
LEON3 and LEON5.
This reverts commit 49cc765db35a5a21cab2aece27a44983fa70b94b,
"sync.md (*membar_storeload_leon3): New insn."
gcc/ChangeLog:
* config/sparc/sync.md (*membar_storeload_leon3): Remove
(*membar_storeload): Enable for LEON
---
gcc/config/sparc/sync.md | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/gcc/config/sparc/sync.md b/gcc/config/sparc/sync.md
index 8808ed5bc14e..ac291420b8b9 100644
--- a/gcc/config/sparc/sync.md
+++ b/gcc/config/sparc/sync.md
@@ -64,19 +64,11 @@
"stbar"
[(set_attr "type" "multi")])
-;; For LEON3, STB has the effect of membar #StoreLoad.
-(define_insn "*membar_storeload_leon3"
- [(set (match_operand:BLK 0 "" "")
- (unspec:BLK [(match_dup 0) (const_int 2)] UNSPEC_MEMBAR))]
- "TARGET_LEON3"
- "stb\t%%g0, [%%sp-1]"
- [(set_attr "type" "store")])
-
;; For V8, LDSTUB has the effect of membar #StoreLoad.
(define_insn "*membar_storeload"
[(set (match_operand:BLK 0 "" "")
(unspec:BLK [(match_dup 0) (const_int 2)] UNSPEC_MEMBAR))]
- "TARGET_V8 && !TARGET_LEON3"
+ "TARGET_V8"
"ldstub\t[%%sp-1], %%g0"
[(set_attr "type" "multi")])
--
2.40.1
